# Enstrom F-28F

- Type: Aircraft model (FAA registry)
- Registry code: 3300412
- Manufacturer (registry): ENSTROM
- Model: F-28F
- Aircraft type: Rotorcraft
- Category: Rotorcraft
- Engines: 1 · Reciprocating
- Seats: 3
- Weight class: Up to 12,499 lb
- Certification: Type certificated
- Data sheet: [TCDS H1CE](https://openairdocs.org/tcds/H1CE) (OpenAirDocs)
- Holder: The Enstrom Helicopter Corporation
- Registered aircraft: 62
- Page: https://openairdocs.org/model/enstrom-f-28f

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023
- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023
- [AD 2018-02-01](https://openairdocs.org/ad/2018-02-01): Main Rotor Head · Enstrom Helicopter Corporation, The 280, 280C, 280F and 8 more. Effective Feb 21, 2018
- [AD 2017-26-03](https://openairdocs.org/ad/2017-26-03): Main Rotor System · Enstrom Helicopter Corporation, The 280, 280C, 280F and 11 more. Effective Jan 4, 2018
- [AD 2012-11-05](https://openairdocs.org/ad/2012-11-05): Main Rotor Control · Enstrom Helicopter Corporation, The 280C, 280F, 280FX and 6 more. Effective Jul 3, 2012
- [AD 2007-11-02](https://openairdocs.org/ad/2007-11-02): Main rotor push-pull control rod (push-pull rod) · Enstrom Helicopter Corporation, The 280, 280C, 280F and 7 more. Effective Oct 2, 2007
- [AD 2007-16-01](https://openairdocs.org/ad/2007-16-01): Main rotor blade retention pin (retention pin) · Enstrom Helicopter Corporation, The 280, 280C, 280F and 11 more. Effective Aug 15, 2007
- [AD 2002-08-03](https://openairdocs.org/ad/2002-08-03): Main Rotor Transmission and Radius of Upper Fillet of Shaft · Enstrom Helicopter Corporation, The 280, 280C, 280F and 21 more. Effective May 2, 2002
- [AD 96-06-03](https://openairdocs.org/ad/96-06-03): Main Rotor Transmission Clutch Assembly · Enstrom Helicopter Corporation, The 280, 280C, 280F and 6 more. Effective Apr 23, 1996
- [AD 94-17-15](https://openairdocs.org/ad/94-17-15): Main Rotor Feathering Bearing · Enstrom Helicopter Corporation, The 280, 280C, 280F and 5 more. Effective Sep 15, 1994
- [AD 93-24-13](https://openairdocs.org/ad/93-24-13): Trim System · Enstrom Helicopter Corporation, The 280C, 280F, 280FX and 3 more. Effective Aug 26, 1994
- [AD 94-13-03](https://openairdocs.org/ad/94-13-03): Tail Rotor Spindle Inspection · Enstrom Helicopter Corporation, The 280C, 280F, 280FX and 3 more. Effective Aug 12, 1994
- [AD 93-15-10](https://openairdocs.org/ad/93-15-10): Composite-Wrapped Main Rotor Shaft · Enstrom Helicopter Corporation, The 280, 280C, 280F and 5 more. Effective Jan 28, 1994
- [AD 90-17-03](https://openairdocs.org/ad/90-17-03): Tail Rotor Drive Shaft Couplings · Enstrom Helicopter Corporation, The 280, 280C, 280F and 5 more. Effective Sep 7, 1990
- [AD 90-17-02](https://openairdocs.org/ad/90-17-02): Tail Rotor Drive Shaft Couplings · Enstrom Helicopter Corporation, The 280, 280C, 280F and 6 more. Effective Sep 7, 1990
- [AD 90-01-06](https://openairdocs.org/ad/90-01-06): Tail Rotor Gearbox · Enstrom Helicopter Corporation, The 280, 280C, 280F and 6 more. Effective Feb 1, 1990
- [AD 88-11-06](https://openairdocs.org/ad/88-11-06): Horizontal Stabilizer · Enstrom Helicopter Corporation, The F-28, F-28A, F-28C and 4 more. Effective May 31, 1988
- [AD 82-24-01](https://openairdocs.org/ad/82-24-01): Drivebelt Clutch Mechanism · Enstrom Helicopter Corporation, The 280, 280C, 280F and 3 more. Effective Nov 30, 1982
- [AD 82-16-09](https://openairdocs.org/ad/82-16-09): Main Rotor Blade Grips · Enstrom Helicopter Corporation, The 280, 280C, 280F and 3 more. Effective Aug 4, 1982
- [AD 81-17-01](https://openairdocs.org/ad/81-17-01): Starting Vibrator Assemblies · Bendix Starting Vibrator Assemblies, B-2, B-2A and 49 more. Effective Aug 13, 1981
- [AD 79-07-02](https://openairdocs.org/ad/79-07-02): Batteries · Aircraft Parts & Development A, A-2, A-3 and 149 more. Effective Apr 3, 1979

Historical (superseded or no longer in force):

- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021
- [AD 2015-08-51](https://openairdocs.org/ad/2015-08-51) (historical): Main Rotor Head · Enstrom Helicopter Corporation, The 280, 280C, 280F and 8 more. Effective Jun 2, 2015
- [AD 2015-04-51](https://openairdocs.org/ad/2015-04-51) (historical): Main Rotor Head · Enstrom Helicopter Corporation, The 280, 280C, 280F and 8 more
- [AD 2011-26-10](https://openairdocs.org/ad/2011-26-10) (historical): Cyclic trim system · Enstrom Helicopter Corporation, The 280C, 280F, 280FX and 6 more. Effective Jan 23, 2012
- [AD 2001-22-01](https://openairdocs.org/ad/2001-22-01) (historical): Main Rotor Shaft · Enstrom Helicopter Corporation, The 280, 280C, 280F and 8 more. Effective Nov 13, 2001

## Information bulletins (advisory) (3)

- [SAIB SW-12-45](https://openairdocs.org/saib/SW-12-45): Garmin Model 400W/500W Series GPS-WAAS Navigation System. Issued Oct 3, 2012
- [SAIB SW-12-10R1](https://openairdocs.org/saib/SW-12-10R1): Fuel Level Indication. Issued Feb 3, 2012
- [SAIB SW-09-30](https://openairdocs.org/saib/SW-09-30): Cracked Pylons. Issued May 27, 2009

## Registered aircraft (62, first 50)

- [N100EN](https://openairdocs.org/aircraft/N100EN): [Downingtown, PA](https://openairdocs.org/faa-place/PA/Downingtown), S/N 816, Registration pending, pending cancellation
- [N109JH](https://openairdocs.org/aircraft/N109JH): [Roeloffs Arie](https://openairdocs.org/faa-owner/ROELOFFS%20ARIE), [Wendell, ID](https://openairdocs.org/faa-place/ID/Wendell), built 1997, S/N 808
- [N128T](https://openairdocs.org/aircraft/N128T): [Blakesmith Don G](https://openairdocs.org/faa-owner/BLAKESMITH%20DON%20G), [London Mills, IL](https://openairdocs.org/faa-place/IL/London%20Mills), built 1990, S/N 770
- [N137R](https://openairdocs.org/aircraft/N137R): [Cowboy Up Aviation LLC](https://openairdocs.org/faa-owner/COWBOY%20UP%20AVIATION%20LLC), [Frenchglen, OR](https://openairdocs.org/faa-place/OR/Frenchglen), built 1995, S/N 804
- [N171DH](https://openairdocs.org/aircraft/N171DH): [Oul LLC](https://openairdocs.org/faa-owner/OUL%20LLC), [Hermon, ME](https://openairdocs.org/faa-place/ME/Hermon), S/N 757
- [N171HH](https://openairdocs.org/aircraft/N171HH): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1988, S/N 758
- [N17BZ](https://openairdocs.org/aircraft/N17BZ): [Cotton Ag Inc](https://openairdocs.org/faa-owner/COTTON%20AG%20INC), [Walters, OK](https://openairdocs.org/faa-place/OK/Walters), built 1981, S/N 702
- [N1952C](https://openairdocs.org/aircraft/N1952C): [Butler William J II](https://openairdocs.org/faa-owner/BUTLER%20WILLIAM%20J%20II), [Juntura, OR](https://openairdocs.org/faa-place/OR/Juntura), built 1981, S/N 709
- [N1952Z](https://openairdocs.org/aircraft/N1952Z): [Butler William J II](https://openairdocs.org/faa-owner/BUTLER%20WILLIAM%20J%20II), [Juntura, OR](https://openairdocs.org/faa-place/OR/Juntura), built 1987, S/N 746
- [N199LB](https://openairdocs.org/aircraft/N199LB): [L A B Flying Service Inc](https://openairdocs.org/faa-owner/L%20A%20B%20FLYING%20SERVICE%20INC), [Renton, WA](https://openairdocs.org/faa-place/WA/Renton), S/N 790
- [N19BZ](https://openairdocs.org/aircraft/N19BZ): [Styer David B](https://openairdocs.org/faa-owner/STYER%20DAVID%20B), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1983, S/N 727
- [N223RS](https://openairdocs.org/aircraft/N223RS): [Jsh Farms Inc](https://openairdocs.org/faa-owner/JSH%20FARMS%20INC), [Hermiston, OR](https://openairdocs.org/faa-place/OR/Hermiston), built 1987, S/N 748
- [N228F](https://openairdocs.org/aircraft/N228F): [Enstrom Helicopter Corp](https://openairdocs.org/faa-owner/ENSTROM%20HELICOPTER%20CORP), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 2007, S/N 819
- [N247NW](https://openairdocs.org/aircraft/N247NW): [Crazy Mountain Rotors LLC](https://openairdocs.org/faa-owner/CRAZY%20MOUNTAIN%20ROTORS%20LLC), [Harlowton, MT](https://openairdocs.org/faa-place/MT/Harlowton), S/N 829
- [N258SH](https://openairdocs.org/aircraft/N258SH): [Wilmarth Russell](https://openairdocs.org/faa-owner/WILMARTH%20RUSSELL), [Alton Bay, NH](https://openairdocs.org/faa-place/NH/Alton%20Bay), built 2008, S/N 826
- [N280M](https://openairdocs.org/aircraft/N280M): [Mrr Spraying LLC](https://openairdocs.org/faa-owner/MRR%20SPRAYING%20LLC), [Shelby, MT](https://openairdocs.org/faa-place/MT/Shelby), S/N 749
- [N280MW](https://openairdocs.org/aircraft/N280MW): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 743
- [N288SH](https://openairdocs.org/aircraft/N288SH): [J&J Shop Heliair LLC](https://openairdocs.org/faa-owner/J%26J%20SHOP%20HELIAIR%20LLC), [Laurel, DE](https://openairdocs.org/faa-place/DE/Laurel), built 2016, S/N 831
- [N28EH](https://openairdocs.org/aircraft/N28EH): [Chapin Ray DBA](https://openairdocs.org/faa-owner/CHAPIN%20RAY%20DBA), [Geneva, NY](https://openairdocs.org/faa-place/NY/Geneva), built 1981, S/N 509
- [N307RT](https://openairdocs.org/aircraft/N307RT): [Northwest Aircraft LLC](https://openairdocs.org/faa-owner/NORTHWEST%20AIRCRAFT%20LLC), [Anaconda, MT](https://openairdocs.org/faa-place/MT/Anaconda), built 1990, S/N 768
- [N44XA](https://openairdocs.org/aircraft/N44XA): [Mackechnie Martin J](https://openairdocs.org/faa-owner/MACKECHNIE%20MARTIN%20J), [Palm Harbor, FL](https://openairdocs.org/faa-place/FL/Palm%20Harbor), S/N 771
- [N503PD](https://openairdocs.org/aircraft/N503PD): [Wjt Investments LLC](https://openairdocs.org/faa-owner/WJT%20INVESTMENTS%20LLC), [Gurley, AL](https://openairdocs.org/faa-place/AL/Gurley), S/N 813
- [N516BY](https://openairdocs.org/aircraft/N516BY): [Iberlin James M](https://openairdocs.org/faa-owner/IBERLIN%20JAMES%20M), [Gillette, WY](https://openairdocs.org/faa-place/WY/Gillette), built 1992, S/N 788
- [N518EG](https://openairdocs.org/aircraft/N518EG): [Styer David B](https://openairdocs.org/faa-owner/STYER%20DAVID%20B), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 812
- [N51PD](https://openairdocs.org/aircraft/N51PD): [Bcww LLC](https://openairdocs.org/faa-owner/BCWW%20LLC), [Bakersfield, CA](https://openairdocs.org/faa-place/CA/Bakersfield), built 1996, S/N 806
- [N52PD](https://openairdocs.org/aircraft/N52PD): [Aviation Endeavors LLC](https://openairdocs.org/faa-owner/AVIATION%20ENDEAVORS%20LLC), [Houston, TX](https://openairdocs.org/faa-place/TX/Houston), built 1996, S/N 807
- [N5698E](https://openairdocs.org/aircraft/N5698E): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 506-2
- [N56999](https://openairdocs.org/aircraft/N56999): [Lofty Images LLC](https://openairdocs.org/faa-owner/LOFTY%20IMAGES%20LLC), [Owosso, MI](https://openairdocs.org/faa-place/MI/Owosso), S/N 517
- [N5699D](https://openairdocs.org/aircraft/N5699D): [Clear Lake Management Corp](https://openairdocs.org/faa-owner/CLEAR%20LAKE%20MANAGEMENT%20CORP), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1981, S/N 510
- [N5699U](https://openairdocs.org/aircraft/N5699U): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 511
- [N5699V](https://openairdocs.org/aircraft/N5699V): [Mesmer Robert F](https://openairdocs.org/faa-owner/MESMER%20ROBERT%20F), [Grand Island, NY](https://openairdocs.org/faa-place/NY/Grand%20Island), built 1981, S/N 512
- [N669CE](https://openairdocs.org/aircraft/N669CE): [One Pft LLC](https://openairdocs.org/faa-owner/ONE%20PFT%20LLC), [Denton, MT](https://openairdocs.org/faa-place/MT/Denton), built 1992, S/N 787
- [N726RM](https://openairdocs.org/aircraft/N726RM): [Eaves Christopher C](https://openairdocs.org/faa-owner/EAVES%20CHRISTOPHER%20C), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1997, S/N 810
- [N730H](https://openairdocs.org/aircraft/N730H): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 730
- [N756H](https://openairdocs.org/aircraft/N756H): [Styer David B](https://openairdocs.org/faa-owner/STYER%20DAVID%20B), [Milton Freewater, OR](https://openairdocs.org/faa-place/OR/Milton%20Freewater), S/N 756
- [N762A](https://openairdocs.org/aircraft/N762A): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1989, S/N 762
- [N825SH](https://openairdocs.org/aircraft/N825SH): [J L Loewen Md Sc](https://openairdocs.org/faa-owner/J%20L%20LOEWEN%20MD%20SC), [Niagara, WI](https://openairdocs.org/faa-place/WI/Niagara), built 2009, S/N 827
- [N857MM](https://openairdocs.org/aircraft/N857MM): [Vigilante Helicopters LLC](https://openairdocs.org/faa-owner/VIGILANTE%20HELICOPTERS%20LLC), [Lewistown, MT](https://openairdocs.org/faa-place/MT/Lewistown), built 1982, S/N 723
- [N8617H](https://openairdocs.org/aircraft/N8617H): [Toutant Roland J](https://openairdocs.org/faa-owner/TOUTANT%20ROLAND%20J), [Woodstock, CT](https://openairdocs.org/faa-place/CT/Woodstock), built 1981, S/N 701
- [N8619A](https://openairdocs.org/aircraft/N8619A): [Cowboy Up Aviation LLC](https://openairdocs.org/faa-owner/COWBOY%20UP%20AVIATION%20LLC), [Frenchglen, OR](https://openairdocs.org/faa-place/OR/Frenchglen), built 1981, S/N 705
- [N8620C](https://openairdocs.org/aircraft/N8620C): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), S/N 706
- [N8622E](https://openairdocs.org/aircraft/N8622E): [Chapin Ray DBA](https://openairdocs.org/faa-owner/CHAPIN%20RAY%20DBA), [Geneva, NY](https://openairdocs.org/faa-place/NY/Geneva), built 1982, S/N 716
- [N8622U](https://openairdocs.org/aircraft/N8622U): [Miller Mark E](https://openairdocs.org/faa-owner/MILLER%20MARK%20E), [Willow, AK](https://openairdocs.org/faa-place/AK/Willow), built 1982, S/N 721
- [N8622X](https://openairdocs.org/aircraft/N8622X): [Northern Construction Inc](https://openairdocs.org/faa-owner/NORTHERN%20CONSTRUCTION%20INC), [Haines, AK](https://openairdocs.org/faa-place/AK/Haines), built 1982, S/N 722
- [N86238](https://openairdocs.org/aircraft/N86238): [Crawford Thomas P](https://openairdocs.org/faa-owner/CRAWFORD%20THOMAS%20P), [Elgin, IL](https://openairdocs.org/faa-place/IL/Elgin), built 1985, S/N 737
- [N8623B](https://openairdocs.org/aircraft/N8623B): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1982, S/N 728
- [N86243](https://openairdocs.org/aircraft/N86243): [Miller Mark](https://openairdocs.org/faa-owner/MILLER%20MARK), [Willow, AK](https://openairdocs.org/faa-place/AK/Willow), built 1982, S/N 724
- [N86244](https://openairdocs.org/aircraft/N86244): [Burke Clint H](https://openairdocs.org/faa-owner/BURKE%20CLINT%20H), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), S/N 763
- [N8624B](https://openairdocs.org/aircraft/N8624B): [Summit Peak Holdings LLC](https://openairdocs.org/faa-owner/SUMMIT%20PEAK%20HOLDINGS%20LLC), [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula), S/N 752
- [N8624G](https://openairdocs.org/aircraft/N8624G): [Temair LLC](https://openairdocs.org/faa-owner/TEMAIR%20LLC), [San Francisco, CA](https://openairdocs.org/faa-place/CA/San%20Francisco), S/N 745

All 62: https://openairdocs.org/model/enstrom-f-28f/aircraft.md

## NTSB investigations (38)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR26LA270](https://openairdocs.org/ntsb/WPR26LA270), Jul 21, 2026: Enstrom F-28F (N8624B), Malad City, ID, substantial damage, investigation ongoing
- [NTSB CEN26LA154](https://openairdocs.org/ntsb/CEN26LA154), Mar 29, 2026: Enstrom F-28F (N942MA), Oelwein, IA, substantial damage. Probable cause: The pilot's failure to maintain directional control during the hover taxi with a quartering tailwind.
- [NTSB ERA22FA262](https://openairdocs.org/ntsb/ERA22FA262), Jun 7, 2022: Enstrom F28 (N600TA), Greenville, OH, substantial damage, 2 fatal. Probable cause: An impact with terrain for undetermined reasons.
- [NTSB ANC21LA038](https://openairdocs.org/ntsb/ANC21LA038), May 9, 2021: Enstrom F-28F (N8627J), Palmer, AK, substantial damage. Probable cause: A loss of drive to the rotor system due to the disengagement of the main belt drive tensioning system, which resulted in a forced landing. The disengagement was due to inadequate clearance between…
- [NTSB WPR17IA198](https://openairdocs.org/ntsb/WPR17IA198), Aug 22, 2017: Enstrom F 28F (N52PD), Glendale, AZ, incident, no damage. Probable cause: An internal failure of the turbo-compressor, which resulted in oil leaking into the turbo-compressor’s exhaust.
- [NTSB GAA16LA100](https://openairdocs.org/ntsb/GAA16LA100), Jan 13, 2016: Enstrom F-28 (N756H), Ritter Butte, OR, substantial damage. Probable cause: The pilot’s improper fuel management, which resulted in a total loss of engine power due to fuel exhaustion and subsequent impact with terrain.
- [NTSB CEN15LA224](https://openairdocs.org/ntsb/CEN15LA224), May 6, 2015: Enstrom F-28F (N8011Q), Argyle, TX, substantial damage. Probable cause: The pilot and flight instructor's inadvertent encounter with settling with power during a confined area takeoff at an altitude that was too low for recovery.
- [NTSB CEN14LA412](https://openairdocs.org/ntsb/CEN14LA412), Aug 7, 2014: Enstrom F 28F (N213BL), Tomah, WI, substantial damage. Probable cause: A loss of engine power due to the malfunction of the No. 4 cylinder intake valve.
- [NTSB WPR13LA167](https://openairdocs.org/ntsb/WPR13LA167), Mar 27, 2013: Enstrom F-28F (N918DK), Twin Falls, ID, substantial damage. Probable cause: A total loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal…
- [NTSB CEN11CA638](https://openairdocs.org/ntsb/CEN11CA638), Aug 29, 2011: Enstrom F-28F (N228F), Menominee, MI, substantial damage. Probable cause: The pilot's failure to maintain control of the helicopter during a hover.
- [NTSB CHI08CA203](https://openairdocs.org/ntsb/CHI08CA203), Jul 23, 2008: Enstrom F28F (N8626E), Amberg, WI, substantial damage. Probable cause: The unsuitable terrain encountered by the pilot during a forced landing following a loss of engine power due to a cylinder head separation. Contributing to the accident was the tree.
- [NTSB LAX07LA106](https://openairdocs.org/ntsb/LAX07LA106), Mar 6, 2007: Enstrom F-28F (N785M), Monmouth, OR, substantial damage. Probable cause: The failure of the main drive belt tension assembly shaft due to high cycle, low stress fatigue.
- [NTSB FTW04LA212](https://openairdocs.org/ntsb/FTW04LA212), Aug 7, 2004: Enstrom F-28F (N78616), De Leon, TX, substantial damage. Probable cause: The pilot's failure to properly secure a fuel line, which resulted in a loss of engine power due to leakage and subsequent fuel starvation.
- [NTSB FTW03LA122](https://openairdocs.org/ntsb/FTW03LA122), Apr 5, 2003: Enstrom F-28F (N86238), Monroe, LA, substantial damage. Probable cause: The pilot's failure to maintain control of the helicopter. A contributing factor was the crosswind.
- [NTSB SEA01LA003](https://openairdocs.org/ntsb/SEA01LA003), Oct 10, 2000: Enstrom F-28F (N223RS), Twin Falls, ID, substantial damage. Probable cause: The pilot's failure to maintain adequate rotor rpm. Unsuitable terrain was selected for the maintenance test flight operation.
- [NTSB LAX99LA112](https://openairdocs.org/ntsb/LAX99LA112), Feb 27, 1999: Enstrom F-28F (N5700C), San Jose, CA, substantial damage. Probable cause: The loss of aircraft control due to the pilot's sudden application of collective combined with excessive cyclic inputs.
- [NTSB MIA98LA221](https://openairdocs.org/ntsb/MIA98LA221), Aug 12, 1998: Enstrom F-28F (N19BZ), Marco Island, FL, substantial damage. Probable cause: The pilot's inadequate fuel management which led to fuel exhaustion. A related factor was the pilot's improper use of the flight controls during autorotation.
- [NTSB ANC98LA109](https://openairdocs.org/ntsb/ANC98LA109), Jul 25, 1998: Enstrom F-28F (N8622U), Skwentna, AK, substantial damage. Probable cause: A loss of engine power due to a fractured number three cylinder intake manifold flange, and the pilot's inability to maintain the proper rate of descent during the autorotation flare. A contributing…
- [NTSB CHI98LA166](https://openairdocs.org/ntsb/CHI98LA166), May 14, 1998: Enstrom F28 (N86238), West Chicago, IL, substantial damage. Probable cause: the student pilot attempting a tailwind landing and improper compensation for the wind resulting in too high of a sink rate and the hard landing.
- [NTSB ANC98LA037](https://openairdocs.org/ntsb/ANC98LA037), Apr 12, 1998: Enstrom F-28F (N199LB), Haines, AK, substantial damage. Probable cause: The pilot flaring too low during an improper practice autorotation.
- [NTSB SEA98FA055](https://openairdocs.org/ntsb/SEA98FA055), Mar 30, 1998: Enstrom F28F (N171HH), Baker, OR, substantial damage. Probable cause: Fatigue failure of the steel tubing pylon structure. Factors include inadequate inspection by maintenance personnel of damage after a previous accident.
- [NTSB SEA98LA021](https://openairdocs.org/ntsb/SEA98LA021), Dec 6, 1997: Enstrom F-28F (N171HH), John Day, OR, substantial damage. Probable cause: a loss of engine power for undetermined reasons.
- [NTSB LAX97LA224](https://openairdocs.org/ntsb/LAX97LA224), Jun 25, 1997: Enstrom F-28-F (N99YC), Riverside, CA, substantial damage. Probable cause: failure by unknown maintenance personnel to retorque the nuts on the retainer cover.
- [NTSB CHI97FA025](https://openairdocs.org/ntsb/CHI97FA025), Nov 11, 1996: Enstrom F28F (N86214), Gutherie, IL, destroyed, 3 fatal. Probable cause: the pilot's inadequate preflight preparation and not maintaining control of the helicopter during its rearward flight. A factor was the pilot's over-confidence in his personal ability.
- [NTSB CHI91LA154](https://openairdocs.org/ntsb/CHI91LA154), May 11, 1991: Enstrom F28 (N86214), Hampshire, IL, substantial damage. Probable cause: AIRCRAFT CONTROL WAS NOT MAINTAINED WHEN THE AIRCRAFT ENCOUNTERED AN UNCOTROLLED DESCENT BY THE PILOT. REMEDIAL ACTION BY THE PILOT WAS INADEQUATE. A FACTOR RELATED TO THE ACIDENT WAS LACK OF TOTAL…
- [NTSB LAX90LA335](https://openairdocs.org/ntsb/LAX90LA335), Sep 6, 1990: Enstrom F28F (N8620A), Beatty, NV, substantial damage. Probable cause: THE PILOT'S SELECTION OF UNSUITABLE TERRAIN ON WHICH TO LAND. LOOSE SHALE ROCK AND SLOPING DOWNHILL TERRAIN WERE FACTORS IN THE ACCIDENT.
- [NTSB LAX90LA155](https://openairdocs.org/ntsb/LAX90LA155), Apr 27, 1990: Enstrom F28F (N756H), Corona, CA, substantial damage. Probable cause: THE PARTIAL FAILURE OF THE ENGINE'S RIGHT MAGNETO, WHICH RESULTED IN A LOSS OF ENGINE POWER.
- [NTSB BFO90LA011](https://openairdocs.org/ntsb/BFO90LA011), Nov 14, 1989: Enstrom F-28F (N8627J), Wilmington, DE, substantial damage. Probable cause: A LOSS OF ENGINE POWER AS A RESULT OF THE STUDENT PILOT INADVERTENTLY PULLING THE MIXTURE CONTROL TO THE IDLE CUT-OFF POSITION, AND THE FLIGHT INSTRUCTOR'S INADEQUATE SUPERVISION. A CONTRIBUTING…
- [NTSB LAX89FA238](https://openairdocs.org/ntsb/LAX89FA238), Jul 11, 1989: Enstrom F28F (N288), Oakland, CA, substantial damage. Probable cause: FAILURE OF THE PILOT TO PROPERLY MAINTAIN ROTOR RPM THROUGHOUT THE AUTOROTATION.
- [NTSB MIA88LA247](https://openairdocs.org/ntsb/MIA88LA247), Aug 6, 1988: Enstrom F-28F (N280MW), Boca Raton, FL, substantial damage
- [NTSB SEA88LA127](https://openairdocs.org/ntsb/SEA88LA127), Jul 13, 1988: Enstrom F-28F (N8620C), Haines, AK, substantial damage
- [NTSB ANC87FA137](https://openairdocs.org/ntsb/ANC87FA137), Sep 5, 1987: Enstrom F-28F (N8622A), Anchorage, AK, substantial damage, 1 fatal
- [NTSB NYC87MA024](https://openairdocs.org/ntsb/NYC87MA024), Oct 22, 1986: Enstrom F-28F (N8617B), Manhattan, NY, destroyed, 1 fatal
- [NTSB NYC85LA208](https://openairdocs.org/ntsb/NYC85LA208), Aug 12, 1985: Enstrom F-28F (N8623X), Groton, CT, substantial damage
- [NTSB DEN85FA134](https://openairdocs.org/ntsb/DEN85FA134), May 12, 1985: Enstrom F-28F (N8618A), Carrizozo, NM, substantial damage, 1 fatal
- [NTSB SEA84LA021](https://openairdocs.org/ntsb/SEA84LA021), Nov 15, 1983: Enstrom F28F (N8622U), Hillsboro, OR, substantial damage
- [NTSB DEN83LA099](https://openairdocs.org/ntsb/DEN83LA099), Apr 17, 1983: Enstrom F-28F (N8623B), Belfield, ND, substantial damage
- [NTSB ANC82DA075](https://openairdocs.org/ntsb/ANC82DA075), Aug 17, 1982: Enstrom F-28F (N5698E), Near Sutton, AK, substantial damage

## FAA accident and incident reports (47)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20260721010279A](https://openairdocs.org/incident/20260721010279A), Jul 21, 2026: Enstrom F-28F (N8624B), Malad, ID, Substantial damage. On July 21, 2026, about 0815 mountain daylight time, an Enstrom F-28F helicopter, [privacy data omitted], was substantially damaged when it was involved in an…
- [Incident 20260516007019I](https://openairdocs.org/incident/20260516007019I), May 16, 2026: Enstrom F-28F (N857MM), Helena, MT, Minor damage. On 16 may pilot attempted to land helicopter to a level unimproved lz in a pasture, as he was lowering the collective the right side of the helicopter appeared…
- [Accident 20260329003769A](https://openairdocs.org/incident/20260329003769A), Mar 29, 2026: Enstrom F-28F (N942MA), Oelwein, IA, Substantial damage. Pilot had recently obtained his certification as a helicopter pilot with limited time in the airframe and experienced a tail wind gust that exceeded his…
- [Accident 20220607009729A](https://openairdocs.org/incident/20220607009729A), Jun 7, 2022: Enstrom F-28F (N600TA), Greenville, OH, Destroyed, 2 fatal. On June 7, 2022, about 0935 eastern standard time, an Enstrom F28 helicopter, [privacy data omitted] sustained substantial damage when it impacted the ground…
- [Accident 20210509011859A](https://openairdocs.org/incident/20210509011859A), May 9, 2021: Enstrom F-28F (N8627J), Palmer, AK, Substantial damage. Aircraft was in cruise flight at about 1.5 into sightseeing operations. While in cruise at ~350 AGL, clutch light flickered and then fully disengaged. Due to…
- [Incident 20161228024619I](https://openairdocs.org/incident/20161228024619I), Dec 28, 2016: Enstrom F-28F (N52PD), No damage. Aircraft was conducting cross- country flight instruction. After take-off the CFI noted there was a smell of smoke. It was not clear where the smell was coming…
- [Accident 20160113000809A](https://openairdocs.org/incident/20160113000809A), Jan 13, 2016: Enstrom F-28F (N756H), Long Creek, OR, Substantial damage. On 1/14/2016 this office was notified of the accident involving acft N756H that had occurred on 1/13/2016 at approx 10:00 am. I contacted grant county sheriff…
- [Accident 20150506008519A](https://openairdocs.org/incident/20150506008519A), May 6, 2015: Enstrom F-28F (N8011Q), Denton, TX, Destroyed. While conducting a confined area takeoff in helicopter N8011Q the aircraft failed to gain sufficient rotor speed to maintain lift as the aircraft began to…
- [Accident 20140807014129A](https://openairdocs.org/incident/20140807014129A), Aug 7, 2014: Enstrom F-28F (N213BL), Tomah, WI, Substantial damage. August 7, 2014 N213BL an Enstrom F28-F helicopter crash landed in a corn field at 20526 glider ave. in Tomah Wisconsin. The helicopter was conducting aerial…
- [Incident 20131011018509I](https://openairdocs.org/incident/20131011018509I), Oct 11, 2013: Enstrom F-28F (N620TA), Jordan Valley, OR, Minor damage. Aircraft lifted off and experienced a loss of power at approximately 50 feet in air. Experienced a hard landing. Damage minimal.
- [Accident 20130327004259A](https://openairdocs.org/incident/20130327004259A), Mar 27, 2013: Enstrom F-28F (N918DK), Twin Falls, ID, Substantial damage. Pilot was in left traffic pattern for runway 12 twf. At approximatey 500 AGL, pilot stated engine began losing power. At 200-300 AGL engine quit. Pilot…
- [Incident 20120417006029I](https://openairdocs.org/incident/20120417006029I), Apr 17, 2012: Enstrom F-28F (N171HH), Pendleton, OR, Minor damage. On landing the engine lost power and the helicopter made harder than normal touch down. The left rear fitting fractured at the skid tube. The pilot thought the…
- [Accident 20110829020209A](https://openairdocs.org/incident/20110829020209A), Aug 29, 2011: Enstrom F-28F (N228F), Menominee, MI, Substantial damage. According to the pilot, the purpose of the company test flight was to measure collective stick forces with the collective bias disabled. The pilot, who was the…
- [Accident 20090801012619A](https://openairdocs.org/incident/20090801012619A), Aug 1, 2009: Enstrm F28F (N8620C), Terrell, TX, Substantial damage. (-23) On August 1, 2009, at 1040 central daylight time, a PA-22-135, N8602C, operated by [privacy data omitted] a private pilot, received substantial damage…
- [Accident 20080723843349A](https://openairdocs.org/incident/20080723843349A), Jul 23, 2008: Enstrm F28F (N8626E), Amberg, WI, Destroyed. (-23) On July 23, 2008 at approximately 1030 cdlt the pilot of this Enstrom helicopter experienced a transient yaw to the left in cruise flight approximately…
- [Incident 20080719850699I](https://openairdocs.org/incident/20080719850699I), Jul 19, 2008: Enstrm F28F (N8011Q), Crandall, TX, Minor damage. (-23) On July 19, 2008, about 0900 central daylight time, single-engine Enstrom, F-28P, helicopter, N8011Q, received minor damaged to the landing skids upon…
- [Incident 20080418837719I](https://openairdocs.org/incident/20080418837719I), Apr 18, 2008: Enstrm F28F (N516BY), Fairmont, WV, Substantial damage, 1 fatal. (-23) The pilot was performing a ground run on the aircraft with no intention of flight. The pilot was not wearing the seat belt and shoulder harness. The…
- [Accident 20070306003369A](https://openairdocs.org/incident/20070306003369A), Mar 6, 2007: Enstrm F28F (N785M), Monmouth, OR, Substantial damage. (-23) On March 6, 2007 at 11:00 am, N785M, while maneuvering for aerial application at approximately 30 feet above the ground, experienced spring capsule shaft…
- [Accident 20040807023399A](https://openairdocs.org/incident/20040807023399A), Aug 7, 2004: Enstrm F28F (N78616), Deleon, TX, Substantial damage. (-23) On August 7, 2004 at 1505CDT, an Enstrom F-28F helicopter, N78616, registered to arrowhead helicopters, inc. p.o. box 4028, kingman, Arizona 86402, lost…
- [Incident 20040807019029I](https://openairdocs.org/incident/20040807019029I), Aug 7, 2004: Enstrm F28F (N1952Z), Parma, ID, Minor damage. (-23) On approach to pollinate a corn field, william butler, pilot of N1952Z, struck and sheared a power line. The helicopter safely landed and incurred only…
- [Accident 20030405011399A](https://openairdocs.org/incident/20030405011399A), Apr 5, 2003: Enstrm F28F (N86238), Monroe, LA, Substantial damage. (-23) The student helicopter pilot was on a local solo flight when he lost control of the aircraft while practicing hovering. The pilot stated that he lost…
- [Accident 20001010018969A](https://openairdocs.org/incident/20001010018969A), Oct 10, 2000: Enstrm F28F (N223RS), Twin Falls, ID, No damage. (-23)These flights were maintenance test flights. During the third auto-rotation of N233RS, when the collective was dropped. The engine throttle rolled off too…
- [Incident 20000808025709I](https://openairdocs.org/incident/20000808025709I), Aug 8, 2000: Enstrm F28F (N8623B), Twin Falls, ID, Minor damage. (-23)Instructor stated that prior to training flight fuel gauge was checked and 12 gallons of fuel added to give 2 hours of flight time. The instruction flight…
- [Accident 19990227042349A](https://openairdocs.org/incident/19990227042349A), Feb 27, 1999: Enstrm F28F (N5700C), San Jose, CA, Substantial damage. (.4)The pilot and a mechanic were performing a postmaintenance test flight following tracking of the main rotor blades. One test flight had already been…
- [Accident 19980812020619A](https://openairdocs.org/incident/19980812020619A), Aug 12, 1998: Enstrm F28F (N19BZ), Marco Island, FL, Substantial damage. The pilot was in cruise flight when the helicopter experienced a total loss of engine power. The pilot entered autorotation and selected a forced landing area.…
- [Accident 19980725017549A](https://openairdocs.org/incident/19980725017549A), Jul 25, 1998: Enstrm F28F (N8622U), Skwentna, AK, Substantial damage. Crashed en route, anchoragae, AK. (-23) on July 25, 1998, at approximately 1400, Alaska daylight time, an Enstrom F28F, N8622U helicopter landed hard after…
- [Accident 19980514016179A](https://openairdocs.org/incident/19980514016179A), May 14, 1998: Enstrm F28F (N86238), Chicago/West Ch, IL, Substantial damage. Made hard downwind landing. (.4)the helicopter was substantially damaged during a hard landing and subsequent roll over during a positioning flight at the…
- [Accident 19980412006729A](https://openairdocs.org/incident/19980412006729A), Apr 12, 1998: Enstrm F28F (N199LB), Haines, AK, Substantial damage. Main rotor blade failed on hard landing from practice autorotaiton. Rotors hit tailboom. (.4)the pilot stated that he held his flare too long during a practice…
- [Accident 19980330010129A](https://openairdocs.org/incident/19980330010129A), Mar 30, 1998: Enstrm F28F (N171HH), Baker, OR, Substantial damage. Refueling on a road. Lifted to clear road for traffic. Vibration caused loss of control. Suspect delaminataed rotor (.4)the pilot stated that he had lifted off…
- [Accident 19971206037439A](https://openairdocs.org/incident/19971206037439A), Dec 6, 1997: Enstrm F28F (N171HH), John Day, OR, Substantial damage. On December 6, 1997, about 1400 pacific standard time, N171HH, an Enstrom F-28F helicoper, operated by the owner/pilot, impacted terrain during a forced…
- [Accident 19970625040829A](https://openairdocs.org/incident/19970625040829A), Jun 25, 1997: Enstrm F28F (N99YC), Riverside, CA, Substantial damage. Engine quit on climbout 200 ft AGL unable auto landed hard. Intake valve rocker shaft came loose. New engine. (.4) during takeoff, the helicopter lost power…
- [Accident 19961111035009A](https://openairdocs.org/incident/19961111035009A), Nov 11, 1996: Enstrm F28F (N86214), Gutherie, IL, Destroyed, 3 fatal. Rolled over backing up on arial taxi. Rotors hit farm truck. Plane rolled inverted and crashed. No backing dual. (-23) on 11/11/96, at approximately 1130 CST,…
- [Incident 19950811031909I](https://openairdocs.org/incident/19950811031909I), Aug 11, 1995: Enstrm F28A (N199LB), Haines, AK, Minor damage. Landing downwind tail veered left struck a bank.
- [Incident 19940805033769I](https://openairdocs.org/incident/19940805033769I), Aug 5, 1994: Enstrm F28F (N86214), Hickley, IL, Minor damage. Demo practice autorotation. Misjudged flare. Tail rotor guard struck the ground.
- [Accident 19910511015749A](https://openairdocs.org/incident/19910511015749A), May 11, 1991: Enstrm F28F (N86214), Hampshire, IL, Substantial damage. Student helicopter pilot slowed at low altitude to look at landing site,got into settling with power. Hit ground.
- [Accident 19900904045869A](https://openairdocs.org/incident/19900904045869A), Sep 4, 1990: Enstrm F28F (N8620A), Beatty, NV, Substantial damage. Landed on shale rock on top of a knoll. Skids slipped off knoll and helicopter rolled over.
- [Accident 19900427013059A](https://openairdocs.org/incident/19900427013059A), Apr 27, 1990: Enstrm F28F (N756H), Corona, CA, Substantial damage. Engine quit on practice autorotations. Landed soft terrain and rolled over. 400 RPM mag drop on post accident test.
- [Accident 19891114045269A](https://openairdocs.org/incident/19891114045269A), Nov 14, 1989: Enstrm F28F (N8627J), Wilmington, DE, Substantial damage. CFI told student to enrich mixture for landing. Student pulled mixture to idle cut off. Made autoroted run landing.
- [Accident 19890711021899A](https://openairdocs.org/incident/19890711021899A), Jul 11, 1989: Enstrm F28F (N288), Oakland, CA, Substantial damage. Allowed rotor RPM to decay on practice autorotation with power recovery. Unable recover hit hard. Collapsed skids.
- [Incident 19881008070389I](https://openairdocs.org/incident/19881008070389I), Oct 8, 1988: Enstrm F28F (N288), Tampa, FL. Smoke in cockpit. Declared emergency and landed. Deplaned on runway. APU generator control unit burned out.
- [Accident 19880806030689A](https://openairdocs.org/incident/19880806030689A), Aug 6, 1988: Enstrm F28F (N280MW), Boca Raton, FL, Substantial damage. Report power loss. Autorotated into shallow water offshore. No defects found. May have been throttle creep.
- [Accident 19880713065119A](https://openairdocs.org/incident/19880713065119A), Jul 13, 1988: Enstrm F28F (N8620C), Haines, AK, Substantial damage. Pilot failed to hold down collective with engine idling when friction lock was released. Helicopter rolled over.
- [Accident 19870905050079A](https://openairdocs.org/incident/19870905050079A), Sep 5, 1987: Enstrm F28C (N8622A), Anchorage, AK, Substantial damage, 1 fatal. Appears pilot lost control in climbout. Crashed into trees south of runway. Localized post impact fire.
- [Accident 19861022087409A](https://openairdocs.org/incident/19861022087409A), Oct 22, 1986: Enstrm F28F (N8617B), Manhattan, NY, Destroyed, 1 fatal. Lost main rotor drive flying at low altitude. Crashed into a fence and river. Incorrect sprague clutch installed.
- [Accident 19850512017919A](https://openairdocs.org/incident/19850512017919A), May 12, 1985: Enstrm F28F (N8618A), Carrizozo, NM, Destroyed. Main fuel pump seal worn, fuel leaked. Tank sending unit rusty,false fuel signal. Out of fuel. Too low for landing.
- [Accident 19831115057649A](https://openairdocs.org/incident/19831115057649A), Nov 15, 1983: Enstrm F28F (N8622U), Hillsboro, OR, Substantial damage. Helicopter engine lost power on climb after takeoff. Crash occurred during autorotation landing.
- [Accident 19830417013869A](https://openairdocs.org/incident/19830417013869A), Apr 17, 1983: Enstrm F28F (N8623B), Belfield, ND, Substantial damage. Touched left skid on a slope landing. Overcompensated and rolled over to the right on the downslope.

## Service difficulty reports (38)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2017FA0000418](https://openairdocs.org/sdr/2017FA0000418), Oct 14, 2016: FUEL CELL. DETERIORATED. DURING PREFLIGHT, SMALL PARTICLES WERE FOUND WHILE CHECKING THE FUEL SUMPS. ON FURTHER INVESTIGATION, IT WAS DETERMINED THAT THE EC776 SLOSHING COMPOUND INSTALL
- [SDR 2009FA0000284](https://openairdocs.org/sdr/2009FA0000284), Mar 31, 2009: MOUNT. CRACKED. TROUBLESHOOTING A TRACKING DISCREPANCY, IT WAS FOUND THAT THE RT FWD MOUNT LOCATION OF THE PYLON HAD CRACKED AS WELL AS THE GUSSET. THE CRACK WAS NOT VISIBLE TH
- [SDR 2008FA0000654](https://openairdocs.org/sdr/2008FA0000654), Jul 23, 2008: CYLINDER HEAD. DAMAGED. DURING CYLINDER OVERHAUL A DAMAGE SEAT POCKET CUTTER USE USED. THIS RESULTED IN A VALVE SEAT POCKET THAT MEASURED WITHIN LIMITS BUT LACKED THE PROPER SURFACE CO
- [SDR EAHR200500002](https://openairdocs.org/sdr/EAHR200500002), Sep 30, 2005: ADAPTER. BROKEN. WELD BROKEN AT TURBO-CHARGER FLANGE.
- [SDR 2003FA0000351](https://openairdocs.org/sdr/2003FA0000351), Jan 4, 2002: LINE. BROKEN. THE TUBE FAILED ADJACENT TO FERRULE ON THE ENGINE DRIVEN FUEL PUMP FITTING. FAILURE WAS FOUND UPON REMOVAL OF THE PART FROM THE AIRCRAFT TO PERFORM OTHER MAINTE
- [SDR 20000524SH010](https://openairdocs.org/sdr/20000524SH010), Apr 28, 2000: CAPACITOR. FAILED. SUBJECT CAPACITOR WAS INSTALLED NEW IN AUGUST, 1999. MAGNETO WAS PART OF SPARE ENGINE NOT INSTALLED UNTIL THIS MONTHV. THE CAPACITOR HAD VERY FEW HOURS (13.3 HR
- [SDR 20000615SH012](https://openairdocs.org/sdr/20000615SH012), Apr 4, 2000: SERVO. LEAKING. ENGINE QUIT IN-FLIGHT. HELICOPTER AUTOROTATED TO GROUND. INSPECTION FOUND FUEL LEAKING INSIDE THE SERVO. SERVO TO REPAIR STATION FOR REPAIR. DEBRIS FOUND IN BAL
- [SDR 20000714SH022](https://openairdocs.org/sdr/20000714SH022), Jun 9, 1999: GUARD. CRACKED. TAIL ROTOR GUARD CRACKED DUE TO VIBRATION.
- [SDR 99ZZZX1720](https://openairdocs.org/sdr/99ZZZX1720), Mar 24, 1999: POINTS. FAILED. POINTS CLOSED AND MAGNETO QUIT DUE TO MELTED CAM FOLLOWER. LYCOMING FACTORY OVERHAULED ENGINE, TELEDYNE CONT FACTORY OVERHAULED MAG, AND SLICK OVERHAULED HARNES
- [SDR 99ZZZX1719](https://openairdocs.org/sdr/99ZZZX1719), Mar 24, 1999: CAPACITOR. FAILED. POINTS CLOSED AND MAGNETO QUIT DUE TO MELTED CAM FOLLOWER. LYCOMING FACTORY OVERHAULED ENGINE, TELEDYNE CONT FACTORY OVERHAULED MAG, AND SLICK OVERHAULED HARNES
- [SDR 99ZZZX856](https://openairdocs.org/sdr/99ZZZX856), Jan 28, 1999: GEARBOX. MAKING METAL. 2.5 HOURS AFTER OIL CHANGE, M/R GEARBOX HAD CHIP LIGHT. LARGE FLAKES, BLACK OIL, SMELLED BURNT. OIL LEVEL CORRECT. OIL SAMPLE TAKEN.
- [SDR 98ZZZX1349](https://openairdocs.org/sdr/98ZZZX1349), Mar 25, 1998: CONTROL CABLE. BINDING. THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 7 WEEKS.
- [SDR 98ZZZX1350](https://openairdocs.org/sdr/98ZZZX1350), Mar 9, 1998: CONTROL CABLE. BINDING. THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 36 WEEKS.
- [SDR 98ZZZX1348](https://openairdocs.org/sdr/98ZZZX1348), Mar 6, 1998: CONTROL CABLE. BINDING. THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 20 WEEKS.
- [SDR 97ZZZX4492](https://openairdocs.org/sdr/97ZZZX4492), Oct 2, 1997: TRANSMISSION. MAKING METAL. TRANSMISSION GENERATING CHIP LIGHTS SINCE NEW ON AVERAGE OF 7-10 HOURS OF OPERATION. MFG SUGGESTED LESS SENSITIVE CHIP PLUG. XMSN CONTINUED TO GENERATE METAL. A
- [SDR 98ZZZX1351](https://openairdocs.org/sdr/98ZZZX1351), Jul 8, 1997: CONTROL CABLE. BINDING. THROTTLE CONTROL CABLE INTERNAL BINDING CAUSES PARTIAL TO FULL LOSS OF THROTTLE CONTROL. UNIT IN SERVICE 12 WEEKS.
- [SDR 97ZZZX3759](https://openairdocs.org/sdr/97ZZZX3759), Jun 25, 1997: AMPLIFIER. FAILED. DURING CLIMB-OUT AT 200 FEET AND 60 MPH, THE ENGINE LOST POWER DUE TO THE NR 2 CYLINDER INTAKE VALVE ROCKER ARM SHAFT FALLING OUT OF THE CYLINDER HEAD. THE LOW 
- [SDR 97ZZZX3758](https://openairdocs.org/sdr/97ZZZX3758), Jun 25, 1997: SEAT. DEFORMED. THIN COMPOSIT BENCH SEAT ACROSS 15.50 INCH WIDE ALUMINUM SEAT STRUCTURE. NOT ADEQUATE FOR TWO PASSENGERS. LOSS OF ENGINE POWER WHEN A VALVE ROCKER ARM SHAFT FEL
- [SDR 97ZZZX3551](https://openairdocs.org/sdr/97ZZZX3551), Jun 25, 1997: ROCKER SHAFT. FAILED. LOOSE RETAINING NUTS WORKED OFF STUDS ALLOWING THE PORT COVER TO FALL OFF AND NR 2 CYLINDER INTAKE VALVE ROCKER ARM SHAFT TO FALL OUT OF THE ENGINE RESULTING IN
- [SDR 97ZZZX2773](https://openairdocs.org/sdr/97ZZZX2773), May 19, 1997: ROD END BEARING. WORN. ACCELERATED LATERAL BEARING WEAR. EXCEEDED LIMITS WITHIN 304 HOURS. THIS ROD END NORMALLY LASTS UP TO 1,000 HOURS IN SERVICE. INSTALLED 2 NEW 01-691-04 BEARINGS
- [SDR 97ZZZX2554](https://openairdocs.org/sdr/97ZZZX2554), May 19, 1997: ROD END BEARING. WORN. ACCELERATED LATERAL BEARING WEAR. EXCEEDED LIMITS WITHIN 304 HOURS. THIS ROD END NORMALLY LASTS UP TO 1,000 HRS IN SERVICE. INSTALLED 2 NEW 01-691-04 BEARINGS.
- [SDR 97ZZZX2769](https://openairdocs.org/sdr/97ZZZX2769), May 18, 1997: UNIVERSAL HSNG. CRACKED. MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS
- [SDR 97ZZZX2771](https://openairdocs.org/sdr/97ZZZX2771), May 14, 1997: UNIVERSAL HSNG. CRACKED. MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS
- [SDR 97ZZZX2557](https://openairdocs.org/sdr/97ZZZX2557), May 14, 1997: UNIVERSAL HSNG. CRACKED. MOUNTING WEBS FOR CONTORL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS
- [SDR 97ZZZX2556](https://openairdocs.org/sdr/97ZZZX2556), May 13, 1997: UNIVERSAL HSNG. CRACKED. MOUNTING WEBS FOR CONTORL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS
- [SDR 96ZZZX5175](https://openairdocs.org/sdr/96ZZZX5175), Sep 11, 1996: RELAY. STUCK CONTACTS. POINTS IN RELAY FUSE TOGETHER CAUSING RUNAWAY TRIM ACTION RESULTING IN UNCONTROLLED ATTITUDES OF ACFT. REQUIRES TWO PILOTS ON CYCLIC TO OVERRIDE AND LAND ACFT. 
- [SDR 96ZZZX4104](https://openairdocs.org/sdr/96ZZZX4104), Jul 8, 1996: ROCKER COVER. GROOVED. ENGINE DISASSEMBLED DUE TO ROTOR BLADE STRIKE. FOUND SEVERAL DEEP RINGS WORN IN ROCKER COVERS WHERE ROCKER SHAFTS RIDE. (NOT CAUSED BY ACCIDENT.) SUBMITTER STAT
- [SDR 96ZZZX5540](https://openairdocs.org/sdr/96ZZZX5540), Jun 7, 1996: YOKE. CRACKED. CRACKS FOUND BETWEEN CONTROL ROD AND UNIVERSAL YOKES. CRACK RUNS DOWN THE WEB BETWEEN BOTH AT 2 LOCATIONS. SUBMITTER STATED THIS IS SECOND FOUND THIS MONTH. THE
- [SDR 96ZZZX4185](https://openairdocs.org/sdr/96ZZZX4185), Jun 7, 1996: SWASHPLATE YOKE. CRACKED. CRACKS FOUND BETWEEN CONTROL ROD AND UNIVERSAL YOKES. CRACK RUNS DOWN THE WEB BETWEEN BOTH AT 2 LOCATIONS. THIS IS SECOND FOUND THIS MONTH. THE OTHER CRACKED SW
- [SDR 96ZZZX5176](https://openairdocs.org/sdr/96ZZZX5176), May 21, 1996: RELAY. STUCK CONTACTS. POINTS IN RELAY FUSE TOGETHER CAUSING RUNAWAY TRIM ACTION RESULTING IN UNCONTROLLED ATTITUDES OF AIRCRAFT. REQUIRES BOTH PILOTS ON CYCLIC TO OVERRIDE. RELAY MFG
- [SDR 96ZZZX2936](https://openairdocs.org/sdr/96ZZZX2936), May 21, 1996: RELAY. FAILED. POINTS IN RELAY FUSE TOGETHER CAUSING RUNAWAY TRIM ACTION RESULTING IN UNCONTROLLED ATTITUDES OF AIRCRAFT. REQUIRES BOTH PILOTS ON CYCLIC TO OVERRIDE. RELAY MFG
- [SDR 97ZZZX2770](https://openairdocs.org/sdr/97ZZZX2770), May 6, 1996: UNIVERSAL HSNG. CRACKED. MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS
- [SDR 97ZZZX2555](https://openairdocs.org/sdr/97ZZZX2555), May 6, 1996: UNIVERSAL HSNG. CRACKED. MOUNTING WEBS FOR CONTROL ROD BEARINGS AND UNIVERSAL JOINT OF LOWER SWASHPLATE FOUND CRACKED AT INSPECTION. THIS IS A PRIMARY FLIGHT CONTROL PART. THIS PART HAS
- [SDR 96ZZZX2937](https://openairdocs.org/sdr/96ZZZX2937), May 2, 1996: TRANSMISSION. MAKING METAL. TRANSMISSION GENERATING CHIP LIGHTS EVERY FIVE MINUTES OF OPERATION. TOOTH OF RING GEAR HAD CHUNK MISSING 1.25 INCHES LONG BY .25 INCH DEEP. INSTALLED ZERO TIME
- [SDR 96ZZZX2796](https://openairdocs.org/sdr/96ZZZX2796), Apr 8, 1996: WASTEGATE. FAILED. BUTTERFLY IN WASTEGATE WARPED AND LOSE FROM CRACKED WELDS JAMMING THROTTLE. BUTTERFLY SHAFT WORN AT PIVOT POINTS ALSO CAUSING THROTTLE BINDING. SUBMITTER STATES
- [SDR 96ZZZX2789](https://openairdocs.org/sdr/96ZZZX2789), Apr 1, 1996: CONTROL CABLE. FRAYED. INFORMATION APPLICABLE TO MODELS, F28C, F28C-2 F28-F, 280F, 280FX. INSPECTION FOUND TAIL ROTOR CABLES FRAYED WHERE THEY PASS OVER THE AFT ALIGNMENT PULLEYS IN T
- [SDR CA960227012](https://openairdocs.org/sdr/CA960227012), Feb 7, 1996: CLAMP. CRACKED. (CAN)CRACKED CLAMP ON FORWARD CROSSTUBE. AIRCRAFT USED AS A TRAINER.
- [SDR 96ZZZX615](https://openairdocs.org/sdr/96ZZZX615), Jan 24, 1996: WASTEGATE. WARPED. BUTTERFLY IN WASTEGATE FOUND WARPED AT EACH 100-HOUR INSPECTION. WARPED WASTEGATE AND WORN BUTTERFLY AND SHAFT CAUSE THROTTLE BINDING. BUTTERFLY MUST BE STRAIGH

## STCs that may be installed (OpenAirDocs) (41)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SR03173CH](https://openairdocs.org/stc/SR03173CH): Installation of Isolair Innovator 11 Model 3900-280 Spray System. Isolair Inc
- [STC SR00063DE](https://openairdocs.org/stc/SR00063DE): Installation of Inframetrics IRTV-445G infrared imaging system. Dart Aerospace Company
- [STC SR02120SE](https://openairdocs.org/stc/SR02120SE): Installation of Garmin GTN 6XX/7XX Navigation System. Garmin International Inc
- [STC SH492NW](https://openairdocs.org/stc/SH492NW): Installation of cargo racks Model 100 (rectangular) or Model 101(tapered) on each side. The ENSTROM Helicopter Corporation
- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SA11137SC](https://openairdocs.org/stc/SA11137SC): Installation of Plane-Power ALT-FLX alternator. Hartzell Engine Technologies, LLC
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC
- [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SR00568NY](https://openairdocs.org/stc/SR00568NY): Installation of remote mounted oil filter, model AFC-500 or AFC-600, and kit AFC-K014. Airwolf Filter Corporation
- [STC SA2586NM](https://openairdocs.org/stc/SA2586NM): Installation of J.P. Instruments temperature monitoring systems. J P Instruments
- [STC SR02487AK](https://openairdocs.org/stc/SR02487AK): Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System. ADS-B Technologies, LLC
- [STC SR03465CH](https://openairdocs.org/stc/SR03465CH): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-ECD-084-280, or AA-ECD-084-480. Airwolf Aerospace LLC
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC
- [STC SH4061NM](https://openairdocs.org/stc/SH4061NM): Installation of Pneumatic Door Actuators. Air Comm Corporation
- [STC SR03353CH](https://openairdocs.org/stc/SR03353CH): Installation of Aspen Avionics Evolution Primary and Multi-Functional Flight Displays. AspenSTC Inc
- [STC SR02232LA](https://openairdocs.org/stc/SR02232LA): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin AT Inc
- [STC SA00068SE](https://openairdocs.org/stc/SA00068SE): Installation of fuel flow/pressure instruments. (W/TSIO-360-MB1). Electronics International Inc
- [STC SA2693NM](https://openairdocs.org/stc/SA2693NM): Installation of Electronics International digital volt/amp gauges and accessories. Electronics International Inc
- [STC SA4172NM](https://openairdocs.org/stc/SA4172NM): Installation of Aviation Development oil filter. Aviation Development Corporation
- [STC SA02033AT](https://openairdocs.org/stc/SA02033AT): Modification to install an air-oil separator to prevent oil from being aspirated from the engine breather line. M-20 Oil Separators LLC
- [STC SA00680SE](https://openairdocs.org/stc/SA00680SE): Installation of Electronics International model UBG-16 or UBG-16T bar graph engine analyzer. Electronics International
- [STC SR01430LA](https://openairdocs.org/stc/SR01430LA): Installation of Stainless Steel Skid shoes. Papas Gary Los Angeles Laboratories Inc
- [STC SA02520AT](https://openairdocs.org/stc/SA02520AT): Installation of M-20 Oil Separator, model 600-WP. M-20 Oil Separators LLC
- [STC SA2687NM](https://openairdocs.org/stc/SA2687NM): Installation of Truboplus/ Electronics Int'l gauges and switches. Aero Manufacturing Inc
- [STC SA00061LA](https://openairdocs.org/stc/SA00061LA): Installation of JPI digital tachometer. J P Instruments
- [STC SA00238SE](https://openairdocs.org/stc/SA00238SE): Installation of Aviation Development Corporation's sump mounted chip detector. Aviation Development Corporation
- [STC SR00179DE](https://openairdocs.org/stc/SR00179DE): Installation of Oilamatic preoiler system. Oilamatic Inc
- [STC SR00757AT](https://openairdocs.org/stc/SR00757AT): Installation of Inframetrics Model IRTV 445G thermal imager. Palmetto Helicopters, Inc
- [STC SR00382AT](https://openairdocs.org/stc/SR00382AT): Installation of FLIR 2000 series thermal imager. Palmetto Helicopters, Inc
- [STC SR00255AT](https://openairdocs.org/stc/SR00255AT): Installation of Spectrolab SX-5 searchlight. Palmetto Helicopters, Inc
- [STC SA1626NM PAGE 1](https://openairdocs.org/stc/SA1626NM%20PAGE%201): Installation of Electronics Int'l Digital EGT/CHT Instruments and accessories. (201 Series). Electronics International
- [STC SA2350NM PAGE 1](https://openairdocs.org/stc/SA2350NM%20PAGE%201): Installation of Electronics International Inc digital carburetor/outside air temperature gauges. Electronics International
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International
- [STC SA3862NM PAGE 1](https://openairdocs.org/stc/SA3862NM%20PAGE%201): Installation of Electronics International Primary TIT/EGT/CHT instruments, remote switches and associated accessories. Electronics International
- [STC SA2867NM](https://openairdocs.org/stc/SA2867NM): Installation of Turboplus/ Electronics Int'l digital temperature gauges. Turboplus, Inc. Lists F-28 Series
- [STC SA2190NM PAGE 1](https://openairdocs.org/stc/SA2190NM%20PAGE%201): Installation of electronics International Digital Volt/Amp Gauges and Accessories. Electronics International
- [STC SH4803SW](https://openairdocs.org/stc/SH4803SW): Install electroformed nickel leading edge protective strip on main rotor blade. Composite Technics, Inc. Lists F-28 Series
- [STC SH591GL](https://openairdocs.org/stc/SH591GL): Install structural provisions for cabinmounted electronic news gathering equipment (TV monitor/ receiver, audio/video switching, AM headset control box, UHF FM control head, associated switches and circuit breakers) not to exceed 30 lbs., baggage-box- mounted UHF/VHF transmitters/receivers not to exceed 20 lbs., and wiring harness. Airborne Microwave, Inc
- [STC SH592GL](https://openairdocs.org/stc/SH592GL): Install Tayburn Electronics microwave antennae, microwave transmitter, and microwave receiver to landing gear skid. Airborne Microwave, Inc
- [STC SA2350NM](https://openairdocs.org/stc/SA2350NM) (historical): Installation of Electronics International Inc digital carburetor/outside air temperature gauges listed on the attached continuation sheet and the associated accessories. Electronics International

## PMA parts (OpenAirDocs) (103, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [MDL TD 031851](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID188062838120250508133549.0001): VA-1A( )AndAccessories. Electronics International Inc · PMA PQ0088NM · Modification part · Apr 10, 2025
- [01-0790906-00](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136486675220220610124334.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · Jun 6, 2022
- [600700-0000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID388381186520220308142525.0001): Turbocharger Assy. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Rajay Model 301E10-2, P/N RJ0328 … · Dec 16, 2021
- [ALE-2008AE-AC](https://drs.faa.gov/browse/excelExternalWindow/E2B30B020A91DE91862585DE00509F79.0001): Stator. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-2008AE, as used in alternators ALT… · Sep 1, 2020
- [ALE-2008AA-AC](https://drs.faa.gov/browse/excelExternalWindow/C617AAB83C6B799B862585DE0050A01D.0001): Stator. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-2008AA, as used in alternators ALY… · Sep 1, 2020
- [XA-943FS-AC](https://drs.faa.gov/browse/excelExternalWindow/B7CC6ECA46AA2F14862585DE00509E71.0001): Pos. Diode. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces XA-943FS, as used in alternators ALE… · Sep 1, 2020
- [ALE-1013AS-AC](https://drs.faa.gov/browse/excelExternalWindow/9F424D3467678943862585DE00509EFC.0001): Alternator Brush. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-1013AS, as used in alternators ALE… · Sep 1, 2020
- [ALU-3045BS-AC](https://drs.faa.gov/browse/excelExternalWindow/68353ACEF594EACF862585DE0050A127.0001): Brush Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALU-3045BS, as used in alternators ALE… · Sep 1, 2020
- [ALE-2008ABS-AC](https://drs.faa.gov/browse/excelExternalWindow/6583E821C11FC24F862585DE0050A086.0001): Stator. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-2008ABS, as used in alternators… · Sep 1, 2020
- [XA-944JS-AC](https://drs.faa.gov/browse/excelExternalWindow/0388185039CFC4DD862585DE00509DDD.0001): Neg. Diode. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces XA-944JS, as used in alternators ALE… · Sep 1, 2020
- [ALE-2008ABS-AC](https://drs.faa.gov/browse/excelExternalWindow/D6FF39FD09272684862585A80035E2C3.0001): Stator. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-2008ABS as used in Kelly… · Jul 14, 2020
- [ALU-3045BS-AC](https://drs.faa.gov/browse/excelExternalWindow/BDCE1BF615C7C07F862585A80035E30E.0001): Brush Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALU-3045BS as used in Kelly Aerospace… · Jul 14, 2020
- [XA-944JS-AC](https://drs.faa.gov/browse/excelExternalWindow/7D10ABF30982F851862585A80035E125.0001): Neg. Diode. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces XA-944JS as used in Kelly Aerospace… · Jul 14, 2020
- [ALE-2008AE-AC](https://drs.faa.gov/browse/excelExternalWindow/653EDB41D36E637B862585A80035E22A.0001): Stator. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-2008AE as used in Kelly Aerospace… · Jul 14, 2020
- [ALE-1013AS-AC](https://drs.faa.gov/browse/excelExternalWindow/5023594FC72E2A5F862585A80035E1DF.0001): Alternator Brush. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-1013AS as used in Kelly Aerospace… · Jul 14, 2020
- [ALE-2008AA-AC](https://drs.faa.gov/browse/excelExternalWindow/4077186575E9032A862585A80035E272.0001): Stator. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces ALE-2008AA as used in Kelly Aerospace… · Jul 14, 2020
- [XA-943FS-AC](https://drs.faa.gov/browse/excelExternalWindow/2B2BE444A62E7876862585A80035E196.0001): Pos. Diode. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces XA-943FS as used in Kelly Aerospace… · Jul 14, 2020
- [AA-ECD-084-280](https://drs.faa.gov/browse/excelExternalWindow/66AC7A188E91A107862585D20047E1E4.0001): Tension-Torsion Strap Assy. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Modification part · Apr 16, 2020
- [P/N AFC-K014](https://drs.faa.gov/browse/excelExternalWindow/EFBC446405E5127286258567003E46D1.0001): Airwolf Remote Oil Filter Kit. Airwolf Filter Corp. · PMA PQ3870SW · Modification part · Oct 8, 2019
- [96394-01](https://drs.faa.gov/browse/excelExternalWindow/D61885C356FABE7286258439006DEF02.0001): ENGINE MOUNT. Hutchinson Aerospace & Industry Inc · PMA PQ0524NM · Replaces 96394-01 · Oct 1, 2018
- [87-05208-001](https://drs.faa.gov/browse/excelExternalWindow/C4B8A8A2B2422B728625822E007853B6.0001): Assembly, Light, PAR 46 Landing. Astronics Luminescent Systems Inc · PMA PQ0786NE · Replaces 01-0790750-20 · Jan 23, 2018
- [A10019-E](https://drs.faa.gov/browse/excelExternalWindow/A43393C3FB19A1D08625818B00616FAA.0001): Pump-Motor Assembly. Weldon Pump · PMA PQ2411CE · Replaces Weldon Pump A10019-E, The Enstrom… · Aug 21, 2017
- [A10019-D](https://drs.faa.gov/browse/excelExternalWindow/181DC2E42593B7228625818B00616F1E.0001): Pump-Motor Assembly. Weldon Pump · PMA PQ2411CE · Replaces Weldon Pump A10019-D, The Enstrom… · Aug 21, 2017
- [87-05207-002](https://drs.faa.gov/browse/excelExternalWindow/4BE4BA39295AB01E862581760058C64D.0001): Assembly, Light, PAR 36 Taxi. Astronics Luminescent Systems Inc · PMA PQ0786NE · Replaces 01-0771833-25 · Aug 1, 2017
- [87-05207-001](https://drs.faa.gov/browse/excelExternalWindow/4ACD6BDF5990D9C7862581760058C571.0001): Assembly, Light, PAR 36 Landing. Astronics Luminescent Systems Inc · PMA PQ0786NE · Replaces 01-0771833-20 · Aug 1, 2017
- [10-357290-1](https://drs.faa.gov/browse/excelExternalWindow/60264AF302AFF2898625810200794B69.0001): Switch, Ignition. Continental Motors Inc · PMA PQ1269CE · Replaces 10-357290-1 · Feb 16, 2017
- [01-0790750-20](https://drs.faa.gov/browse/excelExternalWindow/DF585F07385239BF86257F000060B609.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Oct 28, 2015
- [01-0771833-20](https://drs.faa.gov/browse/excelExternalWindow/B3ED2FAAA3DCF33C86257F000060B51A.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Oct 28, 2015
- [01-0790750-10](https://drs.faa.gov/browse/excelExternalWindow/9D6AFCBD1348AD6186257F000060B5B8.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Oct 28, 2015
- [01-0771833-15](https://drs.faa.gov/browse/excelExternalWindow/687551E9968AF90886257F000060B4C0.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Oct 28, 2015
- [01-0771833-25](https://drs.faa.gov/browse/excelExternalWindow/368AB879B374E71086257F000060B56A.0001): LED Taxi Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Oct 28, 2015
- [01-0771833-10](https://drs.faa.gov/browse/excelExternalWindow/0973C66BC006449A86257F000060B467.0001): LED Landing Light. Whelen Engineering Co Inc · PMA PQ0610NE · Modification part · Oct 28, 2015
- [AA-28-14389-11](https://drs.faa.gov/browse/excelExternalWindow/F816FBBCD3798DDA862585D200488B0C.0001): Cover. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14389-11 · Oct 1, 2015
- [AA-28-14383-13](https://drs.faa.gov/browse/excelExternalWindow/F2E392CD52D3ACE386257ED7004D4E10.0001): Cylinder. Airwolf Aerospace, LLC · PMA PQ2480CE · Replaces 28-14383-13 · Oct 1, 2015
- [AA-28-14239-1](https://drs.faa.gov/browse/excelExternalWindow/CFA6312DCA0B8F99862585D200488799.0001): Cover. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14239-1 · Oct 1, 2015
- [AA-28-14382-19](https://drs.faa.gov/browse/excelExternalWindow/B419DC76E8741B4C86257ED7004D4E0E.0001): Pin. Airwolf Aerospace, LLC · PMA PQ2480CE · Replaces 28-14382-19 · Oct 1, 2015
- [AA-28-14387-13](https://drs.faa.gov/browse/excelExternalWindow/AE0938F98D95416E86257ED7004D4E12.0001): Spindle Adapter. Airwolf Aerospace, LLC · PMA PQ2480CE · Replaces 28-14387-13 · Oct 1, 2015
- [AA-28-14382-19](https://drs.faa.gov/browse/excelExternalWindow/A70FC46B6D2C7EAE862585D200488856.0001): Pin. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14382-19 · Oct 1, 2015
- [AA-28-14382-21](https://drs.faa.gov/browse/excelExternalWindow/881DE1EE8B6EE50986257ED7004D4E0F.0001): Pin. Airwolf Aerospace, LLC · PMA PQ2480CE · Replaces 28-14382-21 · Oct 1, 2015
- [AA-28-14384-13](https://drs.faa.gov/browse/excelExternalWindow/76A22EF3F41C022D862585D2004889E1.0001): Lug. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14384-13 · Oct 1, 2015
- [AA-28-14389-13](https://drs.faa.gov/browse/excelExternalWindow/74E9C2018FD511F886257ED7004D4E14.0001): Cover. Airwolf Aerospace, LLC · PMA PQ2480CE · Replaces 28-14389-13 · Oct 1, 2015
- [AA-28-14239-1](https://drs.faa.gov/browse/excelExternalWindow/646C20B4DB5DFB7386257ED7004D4E0B.0001): Cover. Airwolf Aerospace, LLC · PMA PQ2480CE · Replaces 28-14239-1 · Oct 1, 2015
- [AA-28-14382-21](https://drs.faa.gov/browse/excelExternalWindow/40BFAA605AEAB6EE862585D2004888E0.0001): Pin. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14382-21 · Oct 1, 2015
- [AA-28-14383-13](https://drs.faa.gov/browse/excelExternalWindow/4088AC9F7F363C0E862585D200488963.0001): Cylinder. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14383-13 · Oct 1, 2015
- [AA-28-14389-13](https://drs.faa.gov/browse/excelExternalWindow/2F4056D0E5AA5CD2862585D200488BA8.0001): Cover. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14389-13 · Oct 1, 2015
- [AA-28-14387-13](https://drs.faa.gov/browse/excelExternalWindow/13BDE31D9F1C0866862585D200488A68.0001): Spindle Adapter. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14387-13 · Oct 1, 2015
- [AA-28-14386-5](https://drs.faa.gov/browse/excelExternalWindow/FDF380CC1692466E862585D20047E323.0001): Grip Assembly. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14386-5 · Aug 23, 2015
- [AA-28-14385-15](https://drs.faa.gov/browse/excelExternalWindow/E4804D1F11CA0E70862585D20047E269.0001): Spindle. Airwolf Aerospace LLC (formerly Airwolf Helicopter) · PMA PQ2684CE · Replaces 28-14385-15, 28-14385-13 · Aug 23, 2015
- [A-0750161-25](https://drs.faa.gov/browse/excelExternalWindow/5083DFE4689D480B86257D47005879B2.0001): Exhaust Half Clamp. Aerospace Welding Minneapolis, Inc. · PMA PQ2712CE · Replaces Enstrom P/N 099005-401 EL-037360-401 · Aug 25, 2014
- [DEL099005-100](https://drs.faa.gov/browse/excelExternalWindow/FA3593FCB70AEC1D86257BA2005122BF.0001): Bead Clamp Seal. Dawley Manufacturing Corp · PMA PQ2563CE · Replaces 099005-401, EL-037360-401 · Jul 1, 2013

All of them: https://openairdocs.org/model/enstrom-f-28f/pma.md

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Enstrom Helicopter F28F](https://openairdocs.org/model/enstrom-helicopter-f28f): 2 registered aircraft, registry code 3300413

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