# Enstrom F-28A - Type: Aircraft model (FAA registry) - Registry code: 3300406 - Manufacturer (registry): ENSTROM - Model: F-28A - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Reciprocating - Seats: 3 - Weight class: Up to 12,499 lb - Cruise speed: 75 mph - Certification: Type certificated - Data sheet: [TCDS H1CE](https://openairdocs.org/tcds/H1CE) (OpenAirDocs) - Holder: The Enstrom Helicopter Corporation - Registered aircraft: 38 - Page: https://openairdocs.org/model/enstrom-f-28a 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 2023-11-07](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 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 97-20-04](https://openairdocs.org/ad/97-20-04): Voltage Regulator and Over-Voltage Relay · Enstrom Helicopter Corporation, The 280, 280C, F-28A and 1 more. Effective Oct 7, 1997 - [AD 96-06-02](https://openairdocs.org/ad/96-06-02): Swashplate Bearings · Enstrom Helicopter Corporation, The 280, 280C, F-28A and 2 more. Effective Apr 25, 1996 - [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 93-15-10](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 83-04-04](https://openairdocs.org/ad/83-04-04): Main Rotor Gearboxes · Enstrom Helicopter Corporation, The 280 and F-28A. Effective Mar 1, 1983 - [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 - [AD 77-20-02](https://openairdocs.org/ad/77-20-02): Tail Rotor Spindle · Enstrom Helicopter Corporation, The 280, 280C, F-28 and 2 more. Effective Oct 6, 1977 - [AD 75-22-01](https://openairdocs.org/ad/75-22-01): Main Rotor System · Enstrom Helicopter Corporation, The F-28A. Effective Jul 1, 1976 - [AD 76-05-11](https://openairdocs.org/ad/76-05-11): Tail Cone Attach Bolts · Enstrom Helicopter Corporation, The 280 and F-28A. Effective Mar 18, 1976 - [AD 75-22-10](https://openairdocs.org/ad/75-22-10): Hub Lock Washer · Enstrom Helicopter Corporation, The 280 and F-28A. Effective Oct 28, 1975 - [AD 74-12-01](https://openairdocs.org/ad/74-12-01): Forged Idler Yoke · Enstrom Helicopter Corporation, The F-28 and F-28A. Effective Sep 4, 1974 - [AD 74-17-07](https://openairdocs.org/ad/74-17-07): Main Rotor Gear Box · Enstrom Helicopter Corporation, The F-28A. Effective Aug 24, 1974 - [AD 72-11-04](https://openairdocs.org/ad/72-11-04): Failure Tail Rotor Drive Pins · Enstrom Helicopter Corporation, The F-28A. Effective Jun 1, 1972 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 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 - [AD 76-17-08 R1](https://openairdocs.org/ad/76-17-08-R1) (historical): Main Rotor Shaft · Enstrom Helicopter Corporation, The 280, F-28 and F-28A. Effective Oct 4, 1977 - [AD 76-17-08](https://openairdocs.org/ad/76-17-08) (historical): Main Rotor Shaft · Enstrom Helicopter Corporation, The 280, F-28 and F-28A. Effective Oct 4, 1977 ## Information bulletins (advisory) (1) - [SAIB SW-12-10R1](https://openairdocs.org/saib/SW-12-10R1): Fuel Level Indication. Issued Feb 3, 2012 ## Registered aircraft (38) - [N13CM](https://openairdocs.org/aircraft/N13CM): [Bolin William E](https://openairdocs.org/faa-owner/BOLIN%20WILLIAM%20E), [Smithville, OH](https://openairdocs.org/faa-place/OH/Smithville), built 1972, S/N 090 - [N173](https://openairdocs.org/aircraft/N173): [Shafer Robert T](https://openairdocs.org/faa-owner/SHAFER%20ROBERT%20T), [Grosse Ile, MI](https://openairdocs.org/faa-place/MI/Grosse%20Ile), built 1974, S/N 218 - [N194E](https://openairdocs.org/aircraft/N194E): [Bechtel Friend](https://openairdocs.org/faa-owner/BECHTEL%20FRIEND), [Dry Ridge, KY](https://openairdocs.org/faa-place/KY/Dry%20Ridge), S/N 009 - [N200EH](https://openairdocs.org/aircraft/N200EH): [D & M Aviation Inc](https://openairdocs.org/faa-owner/D%20%26%20M%20AVIATION%20INC), [Amelia, OH](https://openairdocs.org/faa-place/OH/Amelia), built 1974, S/N 200 - [N24RB](https://openairdocs.org/aircraft/N24RB): [Breeden Wayne M](https://openairdocs.org/faa-owner/BREEDEN%20WAYNE%20M), [Memphis, TN](https://openairdocs.org/faa-place/TN/Memphis), built 1971, S/N 057 - [N285Q](https://openairdocs.org/aircraft/N285Q): [Adams Aircraft LLC](https://openairdocs.org/faa-owner/ADAMS%20AIRCRAFT%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), S/N 297 - [N286Q](https://openairdocs.org/aircraft/N286Q): [Pagni Peter P](https://openairdocs.org/faa-owner/PAGNI%20PETER%20P), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), built 1975, S/N 300 - [N296Q](https://openairdocs.org/aircraft/N296Q): [Steffens Robert S](https://openairdocs.org/faa-owner/STEFFENS%20ROBERT%20S), [Peapack, NJ](https://openairdocs.org/faa-place/NJ/Peapack), built 1975, S/N 316 - [N297Q](https://openairdocs.org/aircraft/N297Q): [Blue Sky Helicopter Service LLC](https://openairdocs.org/faa-owner/BLUE%20SKY%20HELICOPTER%20SERVICE%20LLC), [Owendale, MI](https://openairdocs.org/faa-place/MI/Owendale), S/N 317 - [N31216](https://openairdocs.org/aircraft/N31216): [Valley Aire Inc](https://openairdocs.org/faa-owner/VALLEY%20AIRE%20INC), [Marlboro, NY](https://openairdocs.org/faa-place/NY/Marlboro), built 1975, S/N 290 - [N40DL](https://openairdocs.org/aircraft/N40DL): [Styer David B](https://openairdocs.org/faa-owner/STYER%20DAVID%20B), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1971, S/N 071 - [N46MU](https://openairdocs.org/aircraft/N46MU): [Medic Choppers LLC](https://openairdocs.org/faa-owner/MEDIC%20CHOPPERS%20LLC), [Springdale, AR](https://openairdocs.org/faa-place/AR/Springdale), S/N 253 - [N4874](https://openairdocs.org/aircraft/N4874): [Goin Jeff Trustee](https://openairdocs.org/faa-owner/GOIN%20JEFF%20TRUSTEE), [Polk City, FL](https://openairdocs.org/faa-place/FL/Polk%20City), built 1968, S/N 025 - [N4878](https://openairdocs.org/aircraft/N4878): [Medic Choppers LLC](https://openairdocs.org/faa-owner/MEDIC%20CHOPPERS%20LLC), [Springdale, AR](https://openairdocs.org/faa-place/AR/Springdale), built 1969, S/N 029 - [N4889](https://openairdocs.org/aircraft/N4889): [Albert Lea Arpt Inc](https://openairdocs.org/faa-owner/ALBERT%20LEA%20ARPT%20INC), [Albert Lea, MN](https://openairdocs.org/faa-place/MN/Albert%20Lea), built 1969, S/N 041 - [N494H](https://openairdocs.org/aircraft/N494H): [West Palm Beach, FL](https://openairdocs.org/faa-place/FL/West%20Palm%20Beach), built 1975, S/N 309, Sale reported, pending cancellation - [N501EH](https://openairdocs.org/aircraft/N501EH): [Dupont Pierre B](https://openairdocs.org/faa-owner/DUPONT%20PIERRE%20B), [Menominee, MI](https://openairdocs.org/faa-place/MI/Menominee), built 1966, S/N 5 - [N519H](https://openairdocs.org/aircraft/N519H): [Cain James W](https://openairdocs.org/faa-owner/CAIN%20JAMES%20W), [Big Rapids, MI](https://openairdocs.org/faa-place/MI/Big%20Rapids), built 1975, S/N 322 - [N520H](https://openairdocs.org/aircraft/N520H): [Kirsch Kenneth L](https://openairdocs.org/faa-owner/KIRSCH%20KENNETH%20L), [Carneys Point, NJ](https://openairdocs.org/faa-place/NJ/Carneys%20Point), built 1975, S/N 325 - [N56U](https://openairdocs.org/aircraft/N56U): [D&M Aviation Inc](https://openairdocs.org/faa-owner/D%26M%20AVIATION%20INC), [Amelia, OH](https://openairdocs.org/faa-place/OH/Amelia), S/N 139 - [N600RB](https://openairdocs.org/aircraft/N600RB): [Gates Steven](https://openairdocs.org/faa-owner/GATES%20STEVEN), [Midlothian, TX](https://openairdocs.org/faa-place/TX/Midlothian), built 1974, S/N 247 - [N755RD](https://openairdocs.org/aircraft/N755RD): [Eastern Stearman Inc Trustee](https://openairdocs.org/faa-owner/EASTERN%20STEARMAN%20INC%20TRUSTEE), [Leesburg, VA](https://openairdocs.org/faa-place/VA/Leesburg), built 1972, S/N 075 - [N9077](https://openairdocs.org/aircraft/N9077): [Lrh Equipment LLC](https://openairdocs.org/faa-owner/LRH%20EQUIPMENT%20LLC), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1974, S/N 186 - [N90775](https://openairdocs.org/aircraft/N90775): [Dubois Aviation Inc](https://openairdocs.org/faa-owner/DUBOIS%20AVIATION%20INC), [Chino, CA](https://openairdocs.org/faa-place/CA/Chino), built 1969, S/N 039 - [N9093](https://openairdocs.org/aircraft/N9093): [Zimsim LLC](https://openairdocs.org/faa-owner/ZIMSIM%20LLC), [Charleston, SC](https://openairdocs.org/faa-place/SC/Charleston), built 1974, S/N 212 - [N9238](https://openairdocs.org/aircraft/N9238): [Cronite Global Corp](https://openairdocs.org/faa-owner/CRONITE%20GLOBAL%20CORP), [Parsippany, NJ](https://openairdocs.org/faa-place/NJ/Parsippany), built 1974, S/N 229 - [N9244](https://openairdocs.org/aircraft/N9244): [Wahner Rudolf M Jr Trustee](https://openairdocs.org/faa-owner/WAHNER%20RUDOLF%20M%20JR%20TRUSTEE), [Aston, PA](https://openairdocs.org/faa-place/PA/Aston), built 1974, S/N 202 - [N9266](https://openairdocs.org/aircraft/N9266): [Olivers Helicopters Inc](https://openairdocs.org/faa-owner/OLIVERS%20HELICOPTERS%20INC), [Hampshire, IL](https://openairdocs.org/faa-place/IL/Hampshire), built 1974, S/N 216 - [N9274](https://openairdocs.org/aircraft/N9274): [Just Right Solutions LLC](https://openairdocs.org/faa-owner/JUST%20RIGHT%20SOLUTIONS%20LLC), [Negaunee, MI](https://openairdocs.org/faa-place/MI/Negaunee), S/N 248 - [N9563](https://openairdocs.org/aircraft/N9563): [Marzich Frank M](https://openairdocs.org/faa-owner/MARZICH%20FRANK%20M), [Rockford, IL](https://openairdocs.org/faa-place/IL/Rockford), built 1971, S/N 076 - [N9565](https://openairdocs.org/aircraft/N9565): [Bailey Gordon J](https://openairdocs.org/faa-owner/BAILEY%20GORDON%20J), [Fayetteville, GA](https://openairdocs.org/faa-place/GA/Fayetteville), S/N 088 - [N9568](https://openairdocs.org/aircraft/N9568): [Medic Choppers LLC](https://openairdocs.org/faa-owner/MEDIC%20CHOPPERS%20LLC), [Springdale, AR](https://openairdocs.org/faa-place/AR/Springdale), built 1972, S/N 091 - [N9573](https://openairdocs.org/aircraft/N9573): [Styer David B](https://openairdocs.org/faa-owner/STYER%20DAVID%20B), [Pendleton, OR](https://openairdocs.org/faa-place/OR/Pendleton), built 1972, S/N 131 - [N9576](https://openairdocs.org/aircraft/N9576): [Roznick John A](https://openairdocs.org/faa-owner/ROZNICK%20JOHN%20A), [Stillwater, MN](https://openairdocs.org/faa-place/MN/Stillwater), built 1972, S/N 133 - [N9590](https://openairdocs.org/aircraft/N9590): [Stone Heli LLC](https://openairdocs.org/faa-owner/STONE%20HELI%20LLC), [Carrollton, GA](https://openairdocs.org/faa-place/GA/Carrollton), built 1973, S/N 128 - [N9591](https://openairdocs.org/aircraft/N9591): [Freelance Enterprise LLC](https://openairdocs.org/faa-owner/FREELANCE%20ENTERPRISE%20LLC), [Clayton, WA](https://openairdocs.org/faa-place/WA/Clayton), built 1973, S/N 122 - [N9604](https://openairdocs.org/aircraft/N9604): [Medic Choppers LLC](https://openairdocs.org/faa-owner/MEDIC%20CHOPPERS%20LLC), [Springdale, AR](https://openairdocs.org/faa-place/AR/Springdale), S/N 154 - [N9GP](https://openairdocs.org/aircraft/N9GP): [Grangaard Orin T](https://openairdocs.org/faa-owner/GRANGAARD%20ORIN%20T), [Yerington, NV](https://openairdocs.org/faa-place/NV/Yerington), S/N 252 ## NTSB investigations (161, newest 50) 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 ERA26FA077](https://openairdocs.org/ntsb/ERA26FA077), Dec 28, 2025: Enstrom F28 (N520H), Hammonton, NJ, substantial damage, 2 fatal, investigation ongoing - [NTSB WPR21LA293](https://openairdocs.org/ntsb/WPR21LA293), Jul 28, 2021: Enstrom F-28A (N46MU), Mountain Home, ID, substantial damage. Probable cause: The pilot's improper fuel planning and improper in-flight decision-making, which resulted in a total loss of engine power due to fuel exhaustion and a subsequent hard landing on uneven terrain. - [NTSB CEN20LA051](https://openairdocs.org/ntsb/CEN20LA051), Dec 31, 2019: Enstrom F28 (N57SJ), Danbury, TX, substantial damage. Probable cause: The failure of the engine's No.3 intake valve resulting is a loss of engine power and a rollover following the autorotation to soft ground. - [NTSB ERA14LA108](https://openairdocs.org/ntsb/ERA14LA108), Jan 29, 2014: Enstrom F 28A (N24RB), Memphis, TN, substantial damage. Probable cause: A skid tube clamp weld failure due to high residual stress, which resulted in a skid collapse during landing. Contributing to the accident was the airplane manufacturer’s lack of adequate guidance… - [NTSB CEN13LA437](https://openairdocs.org/ntsb/CEN13LA437), Jul 26, 2013: Enstrom F-28A (N287Q), Danbury, TX, substantial damage. Probable cause: The loss of collective control for reasons that could not be determined due to extensive fire damage. - [NTSB CEN13LA360](https://openairdocs.org/ntsb/CEN13LA360), Jun 19, 2013: Enstrom F-28A (N485PM), Danbury, TX, destroyed. Probable cause: The total loss of engine power due to the failure of a connecting rod for reasons that could not be determined during postaccident examination. - [NTSB CEN12CA647](https://openairdocs.org/ntsb/CEN12CA647), Sep 16, 2012: Enstrom F-28A (N194E), Fort Worth, TX, substantial damage. Probable cause: The noncertificated pilot's operation of the helicopter, which resulted in the tail boom's contact with the refueling pump. - [NTSB DFW07CA053](https://openairdocs.org/ntsb/DFW07CA053), Jan 5, 2007: Enstrom F28A (N764PC), Bruceville, TX, substantial damage. Probable cause: The instructor pilot's improper demonstration of an autorotation, resulting in the helicopter's main rotor blades impacting the ground. - [NTSB CHI06LA021](https://openairdocs.org/ntsb/CHI06LA021), Oct 30, 2005: Enstrom F-28A (N266Q), Portland, IN, substantial damage. Probable cause: The pilot's decision to operate the helicopter with a known engine deficiency, the loss of engine power due to the connecting rod failure, and the pilot's failure to maintain directional control… - [NTSB ATL05CA028](https://openairdocs.org/ntsb/ATL05CA028), Nov 22, 2004: Enstrom F-28A (N9235), Smyrna, TN, substantial damage. Probable cause: The loss of engine power for undetermined reasons, and the pilot's improper flare during forced landing, which resulted in an inflight collision into an open field. - [NTSB CHI04CA237](https://openairdocs.org/ntsb/CHI04CA237), Aug 23, 2004: Enstrom F-28A (N9573), Leroy, MN, substantial damage. Probable cause: The partial loss of engine power due to the missing 1/8-27 NPT Allen plug as a result of other maintenance personnel undertorquing the plug. Additionally, the pilot improperly excecuted a run on… - [NTSB CHI03LA104](https://openairdocs.org/ntsb/CHI03LA104), Apr 13, 2003: Enstrom F-28A (N26HW), Lino Lakes, MN, substantial damage. Probable cause: The pilot not maintaining aircraft control while manuevering. - [NTSB CHI02FA001](https://openairdocs.org/ntsb/CHI02FA001), Oct 3, 2001: Enstrom F-28A (N137E), Attica, MI, substantial damage, 1 fatal. Probable cause: The reported loss of engine power due to fuel exhaustion during cruise flight, the pilot not performing an autorotation, the pilot not maintaining rotor RPM during his emergency descent, and the… - [NTSB CHI01LA178](https://openairdocs.org/ntsb/CHI01LA178), Jun 19, 2001: Enstrom F-28A (N612B), Eldridge, IA, substantial damage. Probable cause: The inadequate autorotation and disregarded wind information by the pilot. Factors were the gusting tailwind and the loss of engine power for undetermined reasons. - [NTSB MIA01LA153](https://openairdocs.org/ntsb/MIA01LA153), Jun 5, 2001: Enstrom F28A (N9565), Double Springs, AL, substantial damage. Probable cause: The failure of the pilot to maintain clearance between the skid and trailer while attempting to lift from a trailer resulting in dynamic roll-over. - [NTSB NYC99LA138](https://openairdocs.org/ntsb/NYC99LA138), Jun 12, 1999: Enstrom F-28 (N9588), Cincinnati, OH, substantial damage. Probable cause: The pilot's inadequate evaluation of the weather conditions at the time of departure, which resulted in a downwind takeoff. A factor in the accident was the change in wind direction. - [NTSB LAX98LA242](https://openairdocs.org/ntsb/LAX98LA242), Jul 24, 1998: Enstrom F28A (N288Q), Pleasanton, CA, substantial damage. Probable cause: The flight instructor's delayed remedial action and the student pilot's failure to maintain rotor RPM. A factor was the downhill terrain. - [NTSB NYC98LA076](https://openairdocs.org/ntsb/NYC98LA076), Mar 12, 1998: Enstrom F-28A (N4884), Blue Ash, OH, substantial damage. Probable cause: The failure of a cooling fan blade and the pilot's improper flare. - [NTSB LAX97FA086](https://openairdocs.org/ntsb/LAX97FA086), Jan 12, 1997: Enstrom F28A (N9087), Saipan Island, Sark, destroyed, 2 fatal. Probable cause: loss of engine power due to fuel exhaustion, resulting from improper planning/decision; and the pilot's abrupt handling of the flight controls, while maneuvering to avoid swimmers, which resulted in… - [NTSB FTW96LA149](https://openairdocs.org/ntsb/FTW96LA149), Mar 16, 1996: Enstrom F-28A (N9574), Killeen, TX, substantial damage. Probable cause: The pilot's improper planning/decision, which resulted in fuel exhaustion and a loss of engine power, due to an inadequate supply of fuel. A factor relating to the accident was: lack of suitable… - [NTSB NYC95IA164](https://openairdocs.org/ntsb/NYC95IA164), Jul 9, 1995: Enstrom F-28A (N203Q), Philadelphia, PA, incident, minor damage. Probable cause: the pilot's failure to maintain aircraft control resulting in a collision with the water. - [NTSB NYC95LA012](https://openairdocs.org/ntsb/NYC95LA012), Oct 15, 1994: Enstrom F-28A (N9238), Shelburne, VT, substantial damage. Probable cause: The pilot's inadequate compensation for wind conditions which resulted in a loss of tail rotor effectiveness. - [NTSB BFO94LA137](https://openairdocs.org/ntsb/BFO94LA137), Aug 16, 1994: Enstrom F-28A (N13CM), Stewartsville, NJ, substantial damage. Probable cause: THE LOSS OF ENGINE POWER FOR UNDETERMINED REASON. - [NTSB BFO94LA129](https://openairdocs.org/ntsb/BFO94LA129), Aug 10, 1994: Enstrom F-28A (N292Q), Bangor, ME, destroyed. Probable cause: The pilot's loss of aircraft control. Factors are dark night conditions, and the pilot's execution of an evasive maneuver. - [NTSB NYC93LA175](https://openairdocs.org/ntsb/NYC93LA175), Aug 27, 1993: Enstrom F28A (N269Q), Meriden, CT, substantial damage. Probable cause: THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. - [NTSB NYC93LA128](https://openairdocs.org/ntsb/NYC93LA128), Jun 27, 1993: Enstrom F-28A (N9555), Ironton, OH, substantial damage. Probable cause: THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. THE LACK OF SUITABLE TERRAIN FOR THE FORCED LANDING WAS A FACTOR. - [NTSB NYC93LA016](https://openairdocs.org/ntsb/NYC93LA016), Oct 11, 1992: Enstrom F-28A (N249Q), Kitts Hill, OH, substantial damage. Probable cause: A HARD LANDING DUE TO IMPROPER USE OF THE COLLECTIVE, FOLLOWING A WIRE STRIKE DUE TO INADEQUATE VISUAL LOOKOUT. - [NTSB BFO92LA139](https://openairdocs.org/ntsb/BFO92LA139), Sep 13, 1992: Enstrom F-28A (N950SC), Shelbyville, KY, substantial damage. Probable cause: AN IMPROPER FLARE MADE BY THE PILOT RESULTING IN A HARD LANDING AND MAIN ROTOR BLADE TAIL BOOM STRIKE. - [NTSB LAX92LA245](https://openairdocs.org/ntsb/LAX92LA245), Jun 14, 1992: Enstrom F28A (N159Q), Hanford, CA, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ROTOR RPM DURING THE TAKEOFF. CONTRIBUTING FACTORS WERE: THE PILOT'S LACK OF FAMILIARITY WITH THE AIRCRAFT AND UNFAVORABLE WINDS THAT EXISTED AT THE TIME OF TAKEOFF. - [NTSB NYC92LA100](https://openairdocs.org/ntsb/NYC92LA100), Jun 5, 1992: Enstrom F28A (N296Q), Malvern, PA, substantial damage. Probable cause: THE PILOT ABRUPTLY MOVED THE CYCLIC REARWARD WHICH RESULTED IN THE MAIN ROTOR BLADES STRIKING AND SEPARATING THE TAIL BOOM. A FACTOR IN THIS ACCIDENT WAS THE SOFT MUDDY FIELD. - [NTSB CHI91LA131](https://openairdocs.org/ntsb/CHI91LA131), Apr 12, 1991: Enstrom F-28A (N294Q), Grand Ledge, MI, substantial damage. Probable cause: THE STUDENT'S FAILURE TO MAINTAIN A PROPER ALTITUDE AND CLEARANCE FROM THE TERRAIN ALONG WITH THE CFI'S FAILURE TO ADEQUATELY SUPERVISE THE STUDENT'S ACTIONS. A FACTOR CONTRIBUTING TO THE ACCIDENT… - [NTSB NYC91LA107](https://openairdocs.org/ntsb/NYC91LA107), Apr 6, 1991: Enstrom F28A (N58KC), Leetonia, OH, substantial damage. Probable cause: THE HELICOPTER HOVER PERFORMANCE WAS EXCEEDED BY THE PILOT AND HIS FAILURE TO PERFORM A NORMAL APPROACH TO A LANDING. FACTORS WERE THE HIGH WINDS AND THE TAILWIND CONDITION. - [NTSB NYC90LA200](https://openairdocs.org/ntsb/NYC90LA200), Aug 24, 1990: Enstrom F-28A (N9597), Ravenna, OH, substantial damage. Probable cause: A POWER LOSS, DUE TO CONTAMINATION FROM DETERIORATING FUEL TANK SEALANT, AND THE PILOT'S FAILURE TO NOTICE THE CONTAMINATION DURING PREFLIGHT. - [NTSB MIA90LA120](https://openairdocs.org/ntsb/MIA90LA120), May 13, 1990: Enstrom F-28A (N9056), Marathon, FL, substantial damage. Probable cause: FAILURE OF THE INPUT DRIVE GEAR OF THE TAIL ROTOR GEAR BOX FOR UNDETERMINED REASONS BECAUSE THE DRIVE GEAR WAS NOT RECOVERED FROM THE OCEAN. - [NTSB FTW90LA099](https://openairdocs.org/ntsb/FTW90LA099), Apr 22, 1990: Enstrom F-28A (N287Q), Danbury, TX, substantial damage. Probable cause: PILOT IN COMMAND'S FAILURE TO SEE AND AVOID WIRES DURING THE FINAL STAGE OF AN APPROACH TO A CONFINED AREA. A CONTRIBUTING FACTOR TO THE ACCIDENT WAS THE PILOT'S DISREGARD OF THE OPERATOR'S… - [NTSB MIA90TL#03](https://openairdocs.org/ntsb/MIA90TL%2303), Apr 3, 1990: Enstrom F-28A (N9247), Ft Pierce, FL, substantial damage - [NTSB ANC90FA047](https://openairdocs.org/ntsb/ANC90FA047), Mar 29, 1990: de Havilland DHC-6 (N200EH), Chevak, AK, substantial damage. Probable cause: IMPROPER FLARE BY THE PILOT (PIC) DURING THE LANDING/FLARE. THE WEATHER CONDITION WITH FOG WAS A RELATED FACTOR. - [NTSB NYC89LA213](https://openairdocs.org/ntsb/NYC89LA213), Sep 8, 1989: Enstrom F28A (N203Q), Boston, MA, substantial damage. Probable cause: FAILUE OF PILOT TO MAINTAIN CONTROL OF THE HELICOPTER WHEN A PASSENGER INADVERTENTLY PUSHED THE CYCLIC CONTROL. THE FENCE (NEAR THE HELIPAD) WAS CONSIDERED TO BE A FACTOR. - [NTSB CHI88LA239](https://openairdocs.org/ntsb/CHI88LA239), Sep 18, 1988: Enstrom F28A (N249Q), Celina, OH, destroyed - [NTSB FTW88DRG11](https://openairdocs.org/ntsb/FTW88DRG11), Jul 16, 1988: Enstrom F28A (N9087), Port Isabel, TX, substantial damage - [NTSB LAX88LA198](https://openairdocs.org/ntsb/LAX88LA198), May 27, 1988: Enstrom F28A (N4898), La Verne, CA, substantial damage - [NTSB BFO88FA050](https://openairdocs.org/ntsb/BFO88FA050), May 27, 1988: Enstrom F-28A (N9209), Middletown, DE, substantial damage - [NTSB CHI88LA014](https://openairdocs.org/ntsb/CHI88LA014), Oct 31, 1987: Enstrom F-28A (N9583), Lapeer, MI, substantial damage - [NTSB ATL87LA267](https://openairdocs.org/ntsb/ATL87LA267), Sep 30, 1987: Enstrom F-28A (N29GC), Mansfield, OH, substantial damage - [NTSB NYC87DNC06](https://openairdocs.org/ntsb/NYC87DNC06), Jul 3, 1987: Enstrom F-28A (N9271), Mason, NH, destroyed, 1 fatal. Probable cause: THE LOSS OF AIRCRAFT CONTROL AFTER THE TAIL ROTOR STRUCK THE TREES AND DEPARTED THE AIRCRAFT. THE PILOT'S POOR JUDGEMENT IN FLYING IN WEATHER CONDITIONS BEYOND HIS CAPABILITIES WAS A FACTOR. - [NTSB MKC87LA102](https://openairdocs.org/ntsb/MKC87LA102), May 7, 1987: Enstrom F-28A (N13CM), Fayetteville, AR, substantial damage - [NTSB ATL87DEG05](https://openairdocs.org/ntsb/ATL87DEG05), Apr 30, 1987: Enstrom F-28A (N180Q), Wilmington, OH, substantial damage - [NTSB CHI87LA072](https://openairdocs.org/ntsb/CHI87LA072), Jan 31, 1987: Enstrom F-28A (N9257), Martinsville, IN, destroyed - [NTSB NYC87DNC01](https://openairdocs.org/ntsb/NYC87DNC01), Oct 11, 1986: Enstrom F-28A (N238Q), Belmont, NH, substantial damage - [NTSB NYC86LA173](https://openairdocs.org/ntsb/NYC86LA173), Jun 25, 1986: Enstrom F-28A (N149Q), New York, NY, substantial damage All 161: https://openairdocs.org/model/enstrom-f-28a/ntsb.md ## FAA accident and incident reports (190, newest 50) 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 20251228019712A](https://openairdocs.org/incident/20251228019712A), Dec 28, 2025: Enstrom F-28A (N520H), Hammonton, NJ, Substantial damage, 1 fatal. Enstrom F-28A helicopter collided mid-air with an Enstrom 280C after departure from N81. Both helicopters observed to be flying in close proximity to each… - [Accident 20210728012049A](https://openairdocs.org/incident/20210728012049A), Jul 28, 2021: Enstrom F-28A (N46MU), Mountian Home, ID, Substantial damage. On July 28 pilot[privacy data omitted] determined the helicopter needed fuel. He was unsure about the fuel quantity so he put in 2-3 gallons of fuel. While… - [Incident 20210407001799I](https://openairdocs.org/incident/20210407001799I), Apr 7, 2021: Enstrom F-28A (N9274), Springdale, AR, Minor damage. Investigation: on April 7, 2021 at 1800 local at kasg, the pilot of N9274 while on a solo helicopter flight was performing hovering autorotations on the field… - [Accident 20191231022339A](https://openairdocs.org/incident/20191231022339A), Dec 31, 2019: Enstrom F-28A (N57SJ), Danbury, TX, Destroyed. Aircraft experienced power loss while flying approximately 100 feet above tree tops pilot initiated an autorotation landing when the aircraft landed the skids… - [Incident 20191013017139I](https://openairdocs.org/incident/20191013017139I), Oct 13, 2019: Enstrom F-28A (N286Q), Chugiak, AK, Minor damage. The aircraft was recently rebuilt and conducting its first flight. Off airport inital flight with uneven terrian and tall trees. Airman conducted ground runs… - [Incident 20171204022659I](https://openairdocs.org/incident/20171204022659I), Dec 4, 2017: Enstrom F-28A (N90775), Chino, CA, No damage. While conducting flight operations near the Chino Airport (cno) PIC noted engine running rough. PIC was unable to maintain engine RPM and altitude and made… - [Accident 20140129001159A](https://openairdocs.org/incident/20140129001159A), Jan 29, 2014: Enstrom F-28A (N24RB), Memphis, TN, Substantial damage. On January 29th 2014 at approximately 3:15 pm, N24RB an Enstrom F28A was conducting an instructional flight. The PIC was the certified flight instructor (CFI)… - [Incident 20130802014669I](https://openairdocs.org/incident/20130802014669I), Aug 2, 2013: Enstrom F-28A (N24RB), Memphis, TN, Minor damage. During cruise level flight, the aircraft was struck by a bird breaking out the left-hand windshield. The bird did not enter the aircraft. The glass/plexiglas… - [Accident 20130726019429A](https://openairdocs.org/incident/20130726019429A), Jul 26, 2013: Enstrom F-28A (N287Q), Danbury, TX, Destroyed. On July 26, 2013 the houston flight standards district office (FSDO) was notified of a helicopter crash in Danbury, Texas. The aircraft was reported as N287Q,… - [Accident 20130619013199A](https://openairdocs.org/incident/20130619013199A), Jun 19, 2013: Enstrom F-28A (N485PM), Danbury, TX, Destroyed. On June 19, 2013 upon arrival at Salaika Airport (07TA) at 1330 the helicopter owner escorted us to the accident site located in a pasture one half mile north… - [Accident 20120916026749A](https://openairdocs.org/incident/20120916026749A), Sep 16, 2012: Enstrom F-28A (N194E), Fort Worth, TX, Substantial damage. Airman stated that he was hover taxiing into a refueling area with a strong left croswind. Upon landing the helicopter tail shifted to the right and struck a… - [Accident 20070105000439A](https://openairdocs.org/incident/20070105000439A), Jan 5, 2007: Enstrm F28A (N764PC), Bruceville, TX, Substantial damage. (-23) The flight instructor was demonstrating a hovering autorotation to a student. When the helicopter contacted the ground it pitched forward until the rotor… - [Accident 20051030032119A](https://openairdocs.org/incident/20051030032119A), Oct 30, 2005: Enstrm F28A (N266Q), Portland, IN, Substantial damage. (-23) On October 30, 2005, at 2017 EST a Enstrom F-28A N266Q, registered to the pilot [privacy data omitted] made forced landing into a farm field… - [Accident 20041121034089A](https://openairdocs.org/incident/20041121034089A), Nov 21, 2004: Enstrm F28A (N9235), Smyrna, TN, Substantial damage. (-23) Pilot stated he lost power on landing resulting in a hard landing in soft dirt breaking the left skid and rolling the aircraft on its left side.… - [Accident 20040823019509A](https://openairdocs.org/incident/20040823019509A), Aug 23, 2004: Enstrm F28A (N9573), Leroy, MN, Substantial damage. (-23) Pilot lifted off from pad, climbed to approximately 20 feet and aircraft started to lose power. Pilot performed a right hand descending turn into an open… - [Accident 20030412009359A](https://openairdocs.org/incident/20030412009359A), Apr 12, 2003: Enstrm F28A (N26HW), Lino Lakes, MN, Substantial damage. (-23) On 04/12/2003, at 2123 CDT, an Enstrom F28-A owned by jeff homich and operated by lawrence e. kapplinger crashed in a field while practicing hovering and… - [Accident 20011003032339A](https://openairdocs.org/incident/20011003032339A), Oct 3, 2001: Enstrm F28A (N137E), Arcadiatownship, MI, No damage, 1 fatal. (-23) N137E was on a flight from omans heliport (pvt 6M18) to dupont-lapeer airport (D95), lapeer Michigan for the purpose of tracking and balancing rotor… - [Accident 20010618019559A](https://openairdocs.org/incident/20010618019559A), Jun 18, 2001: Enstrm F28A (N612B), Eldridge, IA, No damage. (-23) Mr. Hopper stated the engine quit on takeoff. He noticed the yellow electric fuel pump light flash at about the same time. The helicopter was at an… - [Accident 20010605014229A](https://openairdocs.org/incident/20010605014229A), Jun 5, 2001: Enstrm F28A (N9565), Double Spring, AL, Substantial damage. (.19)On June 5, 2001, about 1630 central daylight time, an Enstrom F28A, N9565, registered to a private individual, rolled over while lifting off a trailer at… - [Incident 20010214017339I](https://openairdocs.org/incident/20010214017339I), Feb 14, 2001: Enstrm F28A (N291Q), Koblerville, Northern Mariana Islands, Minor damage. (-23) Pilot was practicing autorotations in helicopter. During power recovery, engine hesitated when throttle was advance too fast. Hard landing caused damage… - [Incident 20000420020309I](https://openairdocs.org/incident/20000420020309I), Apr 20, 2000: Enstrm F28A (N46MU), Norwood, MA, Substantial damage. (-23)Aircraft had just landed and was hovering 2 feet off the ground above helicopter (heliport). Engine area caught on fire. Pilot landed a/c and tried to… - [Accident 19990612006989A](https://openairdocs.org/incident/19990612006989A), Jun 12, 1999: Enstrm F28A (N9588), Cincinnati, OH, Destroyed. 1973 Enstrom F-28A helicopter encountered a wind shift on take-off and spun into some ropes around the take-off area, the ropes caught the left skid, the acft… - [Accident 19980723017639A](https://openairdocs.org/incident/19980723017639A), Jul 23, 1998: Enstrm F28A (N288Q), Pleasanton, CA, Substantial damage. (.4)The dual student performed an off-airport pinnacle landing. The CFI stated that the helicopter began to vibrate and moved sideways so he rolled on power.… - [Incident 19980709021919I](https://openairdocs.org/incident/19980709021919I), Jul 9, 1998: Enstrm F28A (N287Q), Danbury, TX, Minor damage. First solo on second approach land fast and hard. Tail rotor hit ground. Damaged drive shaft and tail boom. - [Accident 19980312003169A](https://openairdocs.org/incident/19980312003169A), Mar 12, 1998: Enstrm F28A (N4884), Cincinnati, OH, Substantial damage. Heli was in the pattern for rwy 6/24, on take off the acft climbed to apprx 50FT when the tail rotor shaft failed. (-23) on March 12, 1998, at 1625 EST, an… - [Accident 19970112000329A](https://openairdocs.org/incident/19970112000329A), Jan 12, 1997: Enstrm F28A (N9087), Obyan, Northern Mariana Islands, Destroyed, 2 fatal. Engine power lose. Cyclic control rod seperated. Main rotor blade severed tail drive shaft. Aircraft impacted water. - [Incident 19960421012579I](https://openairdocs.org/incident/19960421012579I), Apr 21, 1996: Enstrm F28A (N4874), Lake Havasu Cit, AZ, Minor damage. Narrative: conducting over water aerial photography of boats, acft began to settle from 30-35 feet on downwind pass. Pilot began turn to upwind direction and… - [Accident 19960316004379A](https://openairdocs.org/incident/19960316004379A), Mar 16, 1996: Enstrm F28A (N9574), Substantial damage. On departure, engine sputtered. Attempted to return, engine failed, autorotated, landed. Hit tail boom. - [Incident 19950709021169I](https://openairdocs.org/incident/19950709021169I), Jul 9, 1995: Enstrm F28A (N203Q), Philadelphia, PA, Minor damage. Took off from helipad and settled into river. Lost rotor RPM during transitional lift. - [Accident 19941015034939A](https://openairdocs.org/incident/19941015034939A), Oct 15, 1994: Enstrm F28A (N9238), Shelburne, VT, Substantial damage. Began uncontrolled spin on landing approach. Landed in trees. Had entered loss of tailrotor effect. Failed to note. - [Accident 19940816021569A](https://openairdocs.org/incident/19940816021569A), Aug 16, 1994: Enstrm F28A (N13CM), Stewartsville, NJ, Substantial damage. Reported power loss. Autorotated to hard landing due low rotor RPM. Chopped tailboom. No engine anomalies found. - [Accident 19940809021069A](https://openairdocs.org/incident/19940809021069A), Aug 9, 1994: Enstrm F28A (N292Q), Bangor, ME, Substantial damage. Lost control avoiding fast moving light that appeared on collision course struck trees. Origin light unknown. - [Incident 19940520021889I](https://openairdocs.org/incident/19940520021889I), May 20, 1994: Enstrm F28A (N288Q), Sacramento, CA. Lost power en route. Auto rotated to ground. NR3 intake valve stuck open and bent causing valve train failure. - [Incident 19940501014769I](https://openairdocs.org/incident/19940501014769I), May 1, 1994: Enstrm F28A (N9270), Mountain Green, UT, Minor damage. Pilot hit a power line while flying at low altitude due to low ceiling. Enter autoratation. Landed on highway. - [Incident 19940414016059I](https://openairdocs.org/incident/19940414016059I), Apr 14, 1994: Enstrm F28A (N287Q), Danbury, TX, Minor damage. Student rolled throttle to idle inadvertently. Power failure, made a hard landing. - [Accident 19930827031609A](https://openairdocs.org/incident/19930827031609A), Aug 27, 1993: Enstrm F28A (N269Q), Meriden, CT, Substantial damage. Lost power on practice autorotation. Impacted ground. Bounced and main rotors chopped tail. Water in fuel system. - [Incident 19930822041779I](https://openairdocs.org/incident/19930822041779I), Aug 22, 1993: Enstrm F28A (N4884), New Richmond, OH, Minor damage. On takeoff from pad on a bluff aircraft descended below bluff. Rotorspeed slowing down. Landed in 10 feet of water. - [Accident 19930627020689A](https://openairdocs.org/incident/19930627020689A), Jun 27, 1993: Enstrm F28A (N9555), Ironton, OH, Substantial damage. Reported engine miss. Tail rotor struck trees on reported precautionary landing. No anomalies found. - [Incident 19930606036109I](https://openairdocs.org/incident/19930606036109I), Jun 6, 1993: Enstrm F28A (N157Q), Miami, FL. Engine lost power after liftoff. - [Accident 19921011041609A](https://openairdocs.org/incident/19921011041609A), Oct 11, 1992: Enstrm F28A (N249Q), Kitts Hill, OH, Substantial damage. Struck wires while landing in a farm field. Wires 16 feet AGL hard to see. Poles hidden by trees. - [Incident 19920914045499I](https://openairdocs.org/incident/19920914045499I), Sep 14, 1992: Enstrm F28A (N9087), Garapan, PS. Lost engine power on sightseeing flight. Autorotation to water. Had NR3 cylinder valve failure. - [Accident 19920913036529A](https://openairdocs.org/incident/19920913036529A), Sep 13, 1992: Enstrm F28A (N950SC), Shelbyville, KY, Substantial damage. Believed engine problem. Made hard impact in a field on precautionary landing. None found. No license or medical. - [Accident 19920614020019A](https://openairdocs.org/incident/19920614020019A), Jun 14, 1992: Enstrm F28A (N159Q), Hanford, CA, Substantial damage. Lost lift on downwind takeoff. Impacted hard,rolled forward. Rotors hit ground. Gross weight and downwind factors. - [Accident 19920605018829A](https://openairdocs.org/incident/19920605018829A), Jun 5, 1992: Enstrm F28A (N296Q), Malvern, PA, Substantial damage. Heavy rain shower prevented landing at base. Landed in muddy field. Front of skids sunk in mud. Chopped tail boom. - [Incident 19920302013789I](https://openairdocs.org/incident/19920302013789I), Mar 2, 1992: Enstrm F28A (N249Q), Jackson County, OH, Minor damage. Aircraft clipped and cut electrical powerlines while attempting to land in an open field. - [Incident 19911214062149I](https://openairdocs.org/incident/19911214062149I), Dec 14, 1991: Enstrm F28A (N1150R), Tulsa, OK, Minor damage. Struck powerlines during air taxi to approach end of runway. Autorotated to ground. - [Accident 19910411010119A](https://openairdocs.org/incident/19910411010119A), Apr 11, 1991: Enstrm F28A (N294Q), Grand Ledge, MI, Substantial damage. While aerial taxiing in from a night dual a skid contacted terrain causing a dynamic rollover. Visual cues limited. - [Accident 19910406009149A](https://openairdocs.org/incident/19910406009149A), Apr 6, 1991: Enstrm F28A (N58KC), Leetonia, OH, Substantial damage. Settled into trees while hovering to land in open field. Gusty strong surface winds in area. - [Incident 19910309010849I](https://openairdocs.org/incident/19910309010849I), Mar 9, 1991: Enstrm F28B (N9584), Meriden, CT, Minor damage. Helicopter turned during hover in strong crosswind. Left skid hit ground and aircraft rolled over on its side. - [Accident 19900824036249A](https://openairdocs.org/incident/19900824036249A), Aug 24, 1990: Enstrm F28A (N9597), Ravenna, OH, Substantial damage. Engine lost power shortly after takeoff. Rotors hit uneven ground landing. Fuel contaminated by fuel cell sealant. All 190: https://openairdocs.org/model/enstrom-f-28a/incidents.md ## Service difficulty reports (6) As reported by operators and repair stations, by the model named in the report. - [SDR 2017FA0000655](https://openairdocs.org/sdr/2017FA0000655), Dec 20, 2017: INTAKE ROCKER. WORN. WHILE CONDUCTION FLIGHT OPERATIONS AND PERFORMING A RIGHT MANEUVER, ENGINE STARTED RUNNING ROUGH. UPON REACHING PATTERN ALTITUDE THE ENGINE COULD NOT MAINTAIN R - [SDR CA141218005](https://openairdocs.org/sdr/CA141218005), Dec 5, 2014: ENGINE. POWER LOSS. (CAN) AFTER NORMAL APPROACH TO LAND, THE TORQUE DROPPED UN-COMMANDED FROM 3400LBS TO 2600LBS, THEN BACK UP AGAIN UN-COMMANDED. OTHER ENGINE PARAMETERS FOLLOWED. - [SDR GWH2011F00000](https://openairdocs.org/sdr/GWH2011F00000), Nov 11, 2011: DRIVE BELT. FRAYED. BELT WAS FOUND TO BE FRAYED ABOUT .5" IN FROM THE AFT SIDE, THE ENTIRE LENGTH OF BELT. PILOT STATED BELT WAS IN GOOD CONDITION WHEN ACFT WAS PREFLIGHTED ABOUT A - [SDR AU980809](https://openairdocs.org/sdr/AU980809), Jul 17, 1998: CYLINDER. CRACKED. (AUS) CYLINDER HEAD SEPARATED FROM BARREL AT THE SECOND THREAD FROM THE TOP. - [SDR 98ZZZX1739](https://openairdocs.org/sdr/98ZZZX1739), Apr 18, 1998: COIL. FAILED. COMPLAINT WAS 'MISFIRE' AT CRUISE POWER. SYMPTOM WAS NOSE YAW AT ERRATIC INTERVALS. NORMAL PREFLIGHT RUN-UP CHECK SHOWED NO PROBLEM. MAGNETO CHECK AT HOVER POWE - [SDR 95ZZZX1314](https://openairdocs.org/sdr/95ZZZX1314), Jan 30, 1995: DISTRIBUTOR GEAR. TEETH FAILED. TEN MINUTES INTO A TOUR FLIGHT, ENGINE BECAME MOMENTARILY ROUGH. UPON RETURNING TO THE HELIPAD, A MAG CHECK REVEALED THE RIGHT MAG WAS DEAD. UPON REMOVAL AND IN ## STCs that may be installed (OpenAirDocs) (40) 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 SR00063DE](https://openairdocs.org/stc/SR00063DE): Installation of Inframetrics IRTV-445G infrared imaging system. Dart Aerospace Company - [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 SR02124SE](https://openairdocs.org/stc/SR02124SE): Installation functionality. of Data Garmin Required: transponders: (1) Garmin GTX Master 345/345R Drawing with List ADS-B (MDL), Out and In 005-00734-A4, functionality;. Garmin International Inc - [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 SR02470AK](https://openairdocs.org/stc/SR02470AK): Installation of the L-3 Communications NGT -1000/2000/2500 ADS-B System. ADS-B Technologies, LLC - [STC SR02471AK](https://openairdocs.org/stc/SR02471AK): Installation of the L-3 Communications NGT -9000/9000R ADS-B 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 SR03520NY](https://openairdocs.org/stc/SR03520NY): Installation of Rotor Head Cover. Spitfire 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 SA01669CH](https://openairdocs.org/stc/SA01669CH): Installation of Challenger Reusable Air Filter. Challenger Aviation Products Inc - [STC SR03353CH](https://openairdocs.org/stc/SR03353CH): Installation of Aspen Avionics Evolution Primary and Multi-Functional Flight Displays. AspenSTC Inc - [STC SA00432SE](https://openairdocs.org/stc/SA00432SE): Installation of EGT 701 series fuel flow instrument. J P Instruments - [STC SA00861SE](https://openairdocs.org/stc/SA00861SE): Installation of J.P. Instruments (JPI) fuel flow indicating system. J P Instruments - [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 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 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 SH592GL](https://openairdocs.org/stc/SH592GL): Install Tayburn Electronics microwave antennae, microwave transmitter, and microwave receiver to landing gear skid. Airborne Microwave, Inc - [STC SH1074SO](https://openairdocs.org/stc/SH1074SO): Installation of an electric rotor engage system with engage and disengage indicators. Aircraft Equipment Certification Corporation - [STC SA2386SW](https://openairdocs.org/stc/SA2386SW): Installation of S.A.F.E., EGT, CHT Systems. Avicon Development Corporation - [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D) (historical): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International 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 ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Enstrom Helicopter F-28A](https://openairdocs.org/model/enstrom-helicopter-f-28a): 1 registered aircraft, registry code 3300401 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.