# Bell 204-B

- Type: Aircraft model (FAA registry)
- Registry code: 1181404
- Manufacturer (registry): BELL
- Model: 204-B
- Aircraft type: Rotorcraft
- Category: Rotorcraft
- Engines: 1 · Turbo-shaft
- Seats: 6
- Weight class: Up to 12,499 lb
- Cruise speed: 103 mph
- Certification: Type certificated
- Data sheet: [TCDS H1SW](https://openairdocs.org/tcds/H1SW) (OpenAirDocs)
- Holder: Bell Textron Inc.
- Registered aircraft: 7
- Page: https://openairdocs.org/model/bell-204-b

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 2024-17-02](https://openairdocs.org/ad/2024-17-02): Rotorcraft Tail Boom · Bell Textron 204B, 205B, 205A-1 and 2 more. Effective Nov 8, 2024
- [AD 2024-19-17](https://openairdocs.org/ad/2024-19-17): Rotorcraft flight control · Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N… (STC SR03408CH). Effective Oct 11, 2024
- [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 2022-20-14](https://openairdocs.org/ad/2022-20-14): Main Rotor Gearbox · Bell Textron 204B, 205A, 205A-1 and 20 more. Effective Dec 27, 2022
- [AD 2022-22-12](https://openairdocs.org/ad/2022-22-12): Nose/Tail Landing Gear Structure/Axle · Replacement crosstubes P/N D212-664 (Dart Aerospace STC SR01298NY). Effective Nov 22, 2022
- [AD 2022-21-11](https://openairdocs.org/ad/2022-21-11): Main rotor blades · Bell Textron 204B, 205A, 205A-1 and 11 more. Effective Nov 16, 2022
- [AD 2022-06-03](https://openairdocs.org/ad/2022-06-03): Main Rotor System · Bell Textron 204B, 205A, 205A-1 and 3 more. Effective Mar 16, 2022
- [AD 2020-19-08](https://openairdocs.org/ad/2020-19-08): Main Rotor · Bell Textron 204B, 205A-1 and 212. Effective Oct 21, 2020
- [AD 2020-16-10](https://openairdocs.org/ad/2020-16-10): Cabin Equipment/Furnishings · Bell Textron 204B, 205A, 205A-1 and 7 more. Effective Sep 3, 2020
- [AD 2018-02-08](https://openairdocs.org/ad/2018-02-08): Main Rotor blades · Bell Helicopter Textron 204B, 205A and 205A-1. Effective Feb 1, 2018
- [AD 2016-22-07](https://openairdocs.org/ad/2016-22-07): Main Rotor Blades · Bell Helicopter Textron 204B, 205A and 205A-1. Effective Nov 30, 2016
- [AD 2015-15-04](https://openairdocs.org/ad/2015-15-04): Main Rotor Blade Grip · Bell Helicopter Textron 204B, 205A, 205A-1 and 1 more. Effective Aug 7, 2015
- [AD 2014-12-04](https://openairdocs.org/ad/2014-12-04): Main Rotor Head · Bell Helicopter Textron 204B, 205A, 205A-1 and 3 more. Effective Jul 24, 2014
- [AD 2014-03-11](https://openairdocs.org/ad/2014-03-11): Tail Rotor Control System · Bell Helicopter Textron 204B. Effective Mar 26, 2014
- [AD 2013-18-07](https://openairdocs.org/ad/2013-18-07): Tail Rotor Control System · Bell Helicopter Textron 204B and 205A-1. Effective Oct 18, 2013
- [AD 2013-03-16](https://openairdocs.org/ad/2013-03-16): Main Rotor Head · Bell Helicopter Textron 204B, 205A, 205A-1 and 3 more. Effective Feb 27, 2013
- [AD 2012-17-08](https://openairdocs.org/ad/2012-17-08): Main Rotor Head · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more. Effective Feb 27, 2013
- [AD 2010-26-52](https://openairdocs.org/ad/2010-26-52): Tail Rotor Blade · Bell Helicopter Textron 204B, 205A, 205A-1 and 6 more. Effective Nov 15, 2011
- [AD 2002-22-14](https://openairdocs.org/ad/2002-22-14): Main rotor tension-torsion (TT) straps · Bell Helicopter Textron 204B, 205A, 205A-1 and 4 more. Effective Dec 13, 2002
- [AD 2002-09-51](https://openairdocs.org/ad/2002-09-51): Tail rotor (T/R) grip · Bell Helicopter Textron 204B, 205A, 205A-1 and 1 more. Effective Aug 22, 2002
- [AD 2001-22-14](https://openairdocs.org/ad/2001-22-14): Fire Extinguishing System Bottle Cartridges · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 105 more. Effective Dec 10, 2001
- [AD 2001-02-11](https://openairdocs.org/ad/2001-02-11): Main Rotor Mast Assembly · Bell Helicopter Textron 204B. Effective Mar 22, 2001
- [AD 2000-15-52](https://openairdocs.org/ad/2000-15-52): Mast and main rotor trunnions · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more. Effective Dec 28, 2000
- [AD 99-17-03](https://openairdocs.org/ad/99-17-03): Tailboom Vertical Fin Spar · Bell Helicopter Textron 204B, 205A and 205A-1. Effective Sep 16, 1999
- [AD 96-12-25](https://openairdocs.org/ad/96-12-25): Tail Rotor Blade · Bell Helicopter Textron 204B. Effective Sep 23, 1996
- [AD 95-10-07](https://openairdocs.org/ad/95-10-07): Tail Rotor Drive Gearbox Assembly · Bell Helicopter Textron 204B, 205A and 205A-1. Effective May 26, 1995
- [AD 93-17-12](https://openairdocs.org/ad/93-17-12): Main Rotor Transmission Lower Planetary Spider · Bell Helicopter Textron 204B, 205A, 205A-1 and 3 more. Effective Jul 29, 1994
- [AD 92-23-01](https://openairdocs.org/ad/92-23-01): Main Rotor Pillow Blocks · Bell Helicopter Textron 204B, 205A, 205A-1 and 10 more. Effective Apr 23, 1993
- [AD 92-13-10](https://openairdocs.org/ad/92-13-10): Tail Rotor Driveshaft Hanger Bearing · Bell Helicopter Textron 204B, 205A, 205A-1 and 3 more. Effective Feb 23, 1993
- [AD 92-07-08](https://openairdocs.org/ad/92-07-08): Swashplate Support Assembly · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more. Effective Mar 25, 1992
- [AD 90-03-10](https://openairdocs.org/ad/90-03-10): Tail Rotor Grips · Arrow Falcon Exporters UH-1H, UH-1F, 204B and 33 more. Effective Oct 18, 1991
- [AD 89-20-12](https://openairdocs.org/ad/89-20-12): Tail Rotor Hub Assembly · Overseas Aircraft Support 204B, 205A, 205A-1 and 8 more. Effective Aug 15, 1990
- [AD 90-01-11](https://openairdocs.org/ad/90-01-11): Tail Rotor Gearbox Bearing Set · Bell Helicopter Textron 204B. Effective Feb 1, 1990
- [AD 89-08-05](https://openairdocs.org/ad/89-08-05): Transmission Internal Sump Oil Filter · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more. Effective Jan 3, 1990
- [AD 88-25-05](https://openairdocs.org/ad/88-25-05): Tail Rotor Grip Assembly · AST UH-1F, 204B, 205A and 25 more. Effective Dec 13, 1988
- [AD 78-20-07](https://openairdocs.org/ad/78-20-07): Shoulder Radius Fitting · Bell Helicopter Textron 204B, 205A-1 and 212. Effective Oct 25, 1978
- [AD 78-21-02](https://openairdocs.org/ad/78-21-02): External Load Link Assembly · Chadwick electronic weighing system C47 (Onboard Systems STC SH149WE or SH17NW). Effective Oct 12, 1978
- [AD 77-17-05](https://openairdocs.org/ad/77-17-05): Emergency Exit Latch Pin · Bell Helicopter Textron 204B, 205A-1, 212 and 2 more. Effective Jul 17, 1978
- [AD 76-02-06](https://openairdocs.org/ad/76-02-06): Main Rotor Blades · Bell Helicopter Textron 204B, 205A-1 and 212. Effective Feb 1, 1976
- [AD 75-26-03](https://openairdocs.org/ad/75-26-03): Emergency Exit Handle · Bell Helicopter Textron 204B, 205A-1 and 212. Effective Jan 19, 1976
- [AD 74-23-02](https://openairdocs.org/ad/74-23-02): Tail Rotor Pitch · Bell Helicopter Textron 204B and 205A-1. Effective Nov 3, 1974
- [AD 73-17-04](https://openairdocs.org/ad/73-17-04): Tail Rotor Grips · Bell Helicopter Textron 204B and 205A-1. Effective Aug 20, 1973
- [AD 70-06-02](https://openairdocs.org/ad/70-06-02): Tail Rotor Grip Assembly · Bell Helicopter Textron 204B, 205A and 205A-1. Effective Mar 13, 1970
- [AD 69-15-07](https://openairdocs.org/ad/69-15-07): Float Kit Tube · Bell Helicopter Textron 204B, 205A and 205A-1. Effective Aug 16, 1969
- [AD 67-24-01](https://openairdocs.org/ad/67-24-01): Sliders on Tail Rotor Assembly · Bell Helicopter Textron 204B. Effective Aug 16, 1967
- [AD 67-06-01](https://openairdocs.org/ad/67-06-01): Tail Rotor Blades · Bell Helicopter Textron 204B. Effective Feb 9, 1967

Historical (superseded or no longer in force):

- [AD 2022-02-02](https://openairdocs.org/ad/2022-02-02) (historical): Main Rotor System · Bell Textron 204B, 205A, 205A-1 and 3 more. Effective Feb 16, 2022
- [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 2021-15-51](https://openairdocs.org/ad/2021-15-51) (historical): Main rotor system · Bell Textron 204B, 205A, 205A-1 and 2 more. Effective Aug 24, 2021
- [AD 2008-10-03](https://openairdocs.org/ad/2008-10-03) (historical): Tail rotor blade assembly · Bell Helicopter Textron 204B, 205A, 205A-1 and 6 more. Effective May 21, 2008
- [AD 2007-19-53](https://openairdocs.org/ad/2007-19-53) (historical): Tail rotor blade (blade) · Bell Helicopter Textron 204B, 205A, 205A-1 and 6 more. Effective Dec 5, 2007
- [AD 2003-01-04](https://openairdocs.org/ad/2003-01-04) (historical): Main rotor grip · New rotor blades (Hillsboro STC SH5132NM). Effective Jan 30, 2003
- [AD 2000-08-52](https://openairdocs.org/ad/2000-08-52) (historical): Main Rotor System · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more
- [AD 98-24-15](https://openairdocs.org/ad/98-24-15) (historical): Main Rotor Mast and Trunnion · Bell Helicopter Textron 204B, 205A, 205A-1 and 2 more. Effective Dec 8, 1998
- [AD 81-19-02](https://openairdocs.org/ad/81-19-02) (historical): Main Rotor Yoke · Bell Helicopter Textron 204B, 205A, 205A-1 and 1 more. Effective Sep 30, 1981
- [AD 80-17-09](https://openairdocs.org/ad/80-17-09) (historical): Main Rotor Straps · Bell Helicopter Textron 204B, 205A-1, 212 and 16 more. Effective Sep 15, 1980
- [AD 79-20-05](https://openairdocs.org/ad/79-20-05) (historical): Main Rotor Hub Assembly · Bell Helicopter Textron 204B, 205A-1 and 212. Effective Jan 18, 1980
- [AD 76-12-07](https://openairdocs.org/ad/76-12-07) (historical): Tail Rotor Chains · Bell Helicopter Textron 204B and 205A-1. Effective Oct 29, 1979
- [AD 75-26-05](https://openairdocs.org/ad/75-26-05) (historical): Main Rotor Blades · Bell Helicopter Textron 204B, 205A-1 and 212. Effective Jan 19, 1976

## Information bulletins (advisory) (1)

- [SAIB ASW-94-01](https://openairdocs.org/saib/ASW-94-01): . Issued Nov 2, 1994

## Registered aircraft (7)

- [N1304X](https://openairdocs.org/aircraft/N1304X): [Northwest Helicopters LLC](https://openairdocs.org/faa-owner/NORTHWEST%20HELICOPTERS%20LLC), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), S/N 3169
- [N204AQ](https://openairdocs.org/aircraft/N204AQ): [Tamarack Helicopters Inc](https://openairdocs.org/faa-owner/TAMARACK%20HELICOPTERS%20INC), [Stevensville, MT](https://openairdocs.org/faa-place/MT/Stevensville), S/N 2198
- [N204NW](https://openairdocs.org/aircraft/N204NW): [Northwest Helicopters LLC](https://openairdocs.org/faa-owner/NORTHWEST%20HELICOPTERS%20LLC), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), S/N 2050
- [N204RA](https://openairdocs.org/aircraft/N204RA): [Rotak LLC](https://openairdocs.org/faa-owner/ROTAK%20LLC), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), built 1965, S/N 2034
- [N6226H](https://openairdocs.org/aircraft/N6226H): [Magnum Aviation LLC](https://openairdocs.org/faa-owner/MAGNUM%20AVIATION%20LLC), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), S/N 2046
- [N67FU](https://openairdocs.org/aircraft/N67FU): [Rotak LLC](https://openairdocs.org/faa-owner/ROTAK%20LLC), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), built 1967, S/N 2064
- [N808ML](https://openairdocs.org/aircraft/N808ML): [Copter Lease LLC Trustee](https://openairdocs.org/faa-owner/COPTER%20LEASE%20LLC%20TRUSTEE), [Albuquerque, NM](https://openairdocs.org/faa-place/NM/Albuquerque), built 1966, S/N 2043

## NTSB investigations (23)

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 LAX97LA204](https://openairdocs.org/ntsb/LAX97LA204), Jun 6, 1997: Bell 204-B (N64F), Kaneohe, HI, substantial damage. Probable cause: failure of the pilot to verify that the load was properly rigged before attempting to pick it up. The uneven (sloping) terrain was a related factor.
- [NTSB MIA97TA139](https://openairdocs.org/ntsb/MIA97TA139), Apr 16, 1997: Bell 204-B (N4580Y), Calderwood, TN, destroyed. Probable cause: The inadequate maintenance inspection of the helicopter resulting in loss of lubrication from the main drive shaft going undetected until failure of the drive shaft.
- [NTSB FTW94LA033](https://openairdocs.org/ntsb/FTW94LA033), Oct 1, 1993: Bell 204-B (N41699), Cedar Crest, NM, no damage. Probable cause: FAILURE OF GROUND PERSONNEL TO FOLLOW PUBLISHED PROCEDURES. A FACTOR WAS THE THE LOAD JETTISON.
- [NTSB ANC93FA056](https://openairdocs.org/ntsb/ANC93FA056), May 2, 1993: Bell 204B (N204AQ), Copper Harbor, AK, destroyed, 1 fatal. Probable cause: FATIGUE FAILURE OF THE TAIL ROTOR GEARBOX, AND IMPROPER HELICOPTER OPERATIONS BEING CONDUCTED BY THE OPERATOR RESULTING IN REPETITIVE AT AND OVER MAXIMUM LOADS. FACTORS IN THE ACCIDENT WERE: MATERIAL…
- [NTSB LAX92T#A16](https://openairdocs.org/ntsb/LAX92T%23A16), Aug 12, 1992: Bell 204B (N204CR), Big Sur, CA, substantial damage
- [NTSB DEN87LA199](https://openairdocs.org/ntsb/DEN87LA199), Jul 29, 1987: Bell 204B (N4580Y), Dubois, WY, substantial damage
- [NTSB NYC76FGM35](https://openairdocs.org/ntsb/NYC76FGM35), Jun 22, 1976: Bell 204-B (N1308X), Masontown, PA, substantial damage
- [NTSB MIA76FKJ73](https://openairdocs.org/ntsb/MIA76FKJ73), Jun 17, 1976: Bell 204B (N8513F), Ozark, AL, substantial damage
- [NTSB OAK74DJY04](https://openairdocs.org/ntsb/OAK74DJY04), Sep 7, 1973: Bell 204B (N8535F), Ramasun, Thailand, substantial damage
- [NTSB OAK73DJY20](https://openairdocs.org/ntsb/OAK73DJY20), Mar 30, 1973: Bell 204B (N1196W), Ban Na, Laos, destroyed
- [NTSB OAK73DJY08](https://openairdocs.org/ntsb/OAK73DJY08), Sep 26, 1972: Bell 204B (N8513F), Lat Khai, Laos, substantial damage
- [NTSB OAK73DJY02](https://openairdocs.org/ntsb/OAK73DJY02), Jul 24, 1972: Bell 204 (N1304X), Can Tho, VM, substantial damage
- [NTSB OAK72DJY19](https://openairdocs.org/ntsb/OAK72DJY19), May 25, 1972: Bell 204B (N8535F), Bouam Long, Laos, substantial damage
- [NTSB OAK72DJY12](https://openairdocs.org/ntsb/OAK72DJY12), Feb 27, 1972: Bell 204B (N8513F), Vientiane, Laos, substantial damage
- [NTSB LAX72DUJ02](https://openairdocs.org/ntsb/LAX72DUJ02), Jul 3, 1971: Bell 204B (N1191W), Heber, AZ, substantial damage
- [NTSB ANC70A0016](https://openairdocs.org/ntsb/ANC70A0016), Aug 22, 1969: Bell 204-B (N1191W), Barrow, AK, substantial damage
- [NTSB OAK70O0011](https://openairdocs.org/ntsb/OAK70O0011), Mar 13, 1969: Bell 204-B (N1304X), Ben Hoa, VM, substantial damage
- [NTSB FTW68A0070](https://openairdocs.org/ntsb/FTW68A0070), Jan 10, 1968: Bell 204-B (N8540F), Galveston, TX, substantial damage
- [NTSB FTW68A0004](https://openairdocs.org/ntsb/FTW68A0004), Jul 15, 1967: Bell 204-B (N7931S), Laplace, LA, substantial damage
- [NTSB FTW67A0096](https://openairdocs.org/ntsb/FTW67A0096), Mar 12, 1967: Bell 204-B (N1177W), Vinton, LA, substantial damage
- [NTSB FTW67A0065](https://openairdocs.org/ntsb/FTW67A0065), Dec 18, 1966: Bell 204-B (N8540F), Morgan City, LA, substantial damage
- [NTSB FTW67A0043](https://openairdocs.org/ntsb/FTW67A0043), Oct 8, 1966: Bell 204B (N1187W), Morgan City, LA, destroyed, 11 fatal
- [NTSB DEN66A0031](https://openairdocs.org/ntsb/DEN66A0031), Nov 5, 1965: Bell 204B (N73273), Georgetown, CO, substantial damage

## FAA accident and incident reports (16)

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.

- [Incident 20091115024119I](https://openairdocs.org/incident/20091115024119I), Nov 15, 2009: Bell 204B (N204AH), Fullerton, CA, Substantial damage. Pilot started aircraft to charge up battery, intended to taxi to wash rack. Decided to get out with engine running to get a bottle of water from his car.…
- [Incident 20081025851709I](https://openairdocs.org/incident/20081025851709I), Oct 25, 2008: Bell 204B (N204AH), Fullerton, CA, Minor damage. (-23) Pilot stated after takeoff from ful he heard a loud sound and elected to land the helicopter back at ful. Inspection showed the engine cowling had…
- [Incident 19980222001759I](https://openairdocs.org/incident/19980222001759I), Feb 22, 1998: Bell 204B (N204SH), Barstow, CA, Substantial damage. Narrative: on February 21, 1998, at 1715 PST, a Bell helicopter model 204B, serial number 2019, N204SH, made a precautionary landing. The location was in the…
- [Accident 19970606016369A](https://openairdocs.org/incident/19970606016369A), Jun 6, 1997: Bell 204B (N64F), Kaneohe, HI, Substantial damage. The aircraft was preparing to sling a metal utility pole. As the pilot picked up the load, one of the sling lines snagged. Although ground personnel saw what…
- [Accident 19970416006029A](https://openairdocs.org/incident/19970416006029A), Apr 16, 1997: Bell 204B (N4580Y), Calderwood, TN, Destroyed. Forest fire flight. Filled water bucket. Loud bank. Lost power. Autorotated to trees. Rotor drive shaft failed. (-23) pilot was sling loading water to a forest…
- [Accident 19931001046359A](https://openairdocs.org/incident/19931001046359A), Oct 1, 1993: Bell 204B (N41699), Cedar Crest, NM. Unable to set telephone pole jettisoned pole in designated area. Pole bounced hit ground man that had entered area.
- [Accident 19930502011439A](https://openairdocs.org/incident/19930502011439A), May 2, 1993: Bell 204B (N204AQ), Copper Harbor, AK, Destroyed, 1 fatal. Smoke from tail rotor. Gear box broke during approach. Spun in. Over gross weight. Improper maintenance procedures.
- [Incident 19891001058759I](https://openairdocs.org/incident/19891001058759I), Oct 1, 1989: Bell 204B (N204AQ), Medford, OR. Radio failure en route. Unable to contact ATC. Flew through control zone without clearance.
- [Incident 19890314026999I](https://openairdocs.org/incident/19890314026999I), Mar 14, 1989: Bell 204B (N204AH), Long Beach, CA, Minor damage. Loud sound in flight. Landed at heliport. Found right engine cowling missing. Had a defective latch assembly.
- [Incident 19871211074629I](https://openairdocs.org/incident/19871211074629I), Dec 11, 1987: Bell 204B (N204AH), San Diego, CA. Engine temporarily lost power. Assumed compressor stall. Pilot released external load cable and landed.
- [Accident 19870729046029A](https://openairdocs.org/incident/19870729046029A), Jul 29, 1987: Bell STC204 (N4580Y), Dubois, WY, Substantial damage. Engine quit during seismic sling load operations. Auto rotated into trees and rough terrain.
- [Incident 19780216006789I](https://openairdocs.org/incident/19780216006789I), Feb 16, 1978: Bell 204B (N1177W), Pearland, TX, Minor damage. Pilot experienced partial loss of tail rotor control. Made successful run-on landing on foamed runway.
- [Accident 19760622028929A](https://openairdocs.org/incident/19760622028929A), Jun 22, 1976: Bell 204B (N1308X), Masontown, PA, Substantial damage. Fuel reg set 109 degrees. Lyc p/n 1-100-490-06. Fracture ocrd by stress rupture mechanism.
- [Accident 19760617018989A](https://openairdocs.org/incident/19760617018989A), Jun 17, 1976: Bell 204B (N8513F), Ozark, AL, Destroyed. Exit hatch separated in flt - struck tail rotor.
- [Accident 19730907042819A](https://openairdocs.org/incident/19730907042819A), Sep 7, 1973: Bell 204B (N8535F), Ramasun, Substantial damage. Investigation under the jurisdiction of the govt of thailand.
- [Accident 19730330035439A](https://openairdocs.org/incident/19730330035439A), Mar 30, 1973: Bell UHIBWILCO (N1196W), Ban Na, Substantial damage. Da 6800FT.un to sustain rotor RPM.investigation under jurisdiction laotian govt.

## Service difficulty reports (77, newest 50)

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

- [SDR QMLA2022081920055](https://openairdocs.org/sdr/QMLA2022081920055), Aug 15, 2022: NONE. NONE. SUPPLEMENTAL INFO FOR SDR QMLA2022081920055 AC WAS EXPERIENCING UN-COMMANDED "ROLL" INPUTS WITH AP1 SHOWING "DEGRADED" AND AP2 NORMAL OPERATION. THE FLIGHT SYST
- [SDR EVCA033022](https://openairdocs.org/sdr/EVCA033022), Mar 30, 2022: NONE. CRACKED. THERE IS A SMALL CRACK, (1/4 INCH LONG), FORWARD LH SIDE THAT WE WILL STOP DRILL.
- [SDR CA190806009](https://openairdocs.org/sdr/CA190806009), Jul 31, 2019: BOLT. BROKEN. (CAN) DURING CRUISE FLIGHT THE PILOT HEARD "WHAT SOUNDED LIKE A SMALL BANG, A SOUND THAT IN THE PAST I HAD BEEN A METAL DRINK BOTTLE OR CELLPHONE DROPPING ONTO 
- [SDR CA190705001](https://openairdocs.org/sdr/CA190705001), Jul 2, 2019: FITTING. CRACKED. (CAN) DURING A SCHEDULED INSPECTION OF TAILBOOM ATTACHMENT FITTINGS THE UPPER L/H FITTING WAS SUSPECTED TO BE CRACKED. THE TAILBOOM AND COWLS WERE REMOVED FOR C
- [SDR CA150601014](https://openairdocs.org/sdr/CA150601014), May 26, 2015: VALVE. BROKEN. (CAN) DURING FLIGHT TRAINING, TWO PILOTS WERE FLYING FOR A PPC. THE ACFT WAS JUST COMING OUT OF A TURN WHEN THE FLIGHT INSTRUCTOR SWITCHED THE HYDRAULICS OFF, A
- [SDR CA150204016](https://openairdocs.org/sdr/CA150204016), Feb 4, 2015: PIN. CRACKED. (CAN) DURING A ROUTINE INSPECTION OF THE HEAD REST. THE ENGINEER NOTED THAT THE T HANDLE PORTION ON ON QUICK RELEASE PIN, PIP PIN, PN NAS1333A2S07D WAS CRACKED 
- [SDR CA140708005](https://openairdocs.org/sdr/CA140708005), Jun 27, 2014: DOUBLER. CRACKED. (CAN) CRACK WAS DISCOVERED DURING DAILY INSPECTION. THE CRACK WAS LOCATED IN THE TAIL BOOM DOUBLER BELOW THE 42" GEAR BOX WHERE IT IS NOTCHED TO ACCOMMODATE THE
- [SDR CA130912007](https://openairdocs.org/sdr/CA130912007), Aug 27, 2013: SWITCH. FAILED. (CAN) THE PILOT MADE A RADIO CALL AND THE SWITCH FAILED IN THE CLOSED, TRANSMIT, POSITION CAUSING THE VHF COM RADIO TO CONTINUOUSLY TRANSMIT. TURNED THE RADIO O
- [SDR CA130820004](https://openairdocs.org/sdr/CA130820004), Aug 15, 2013: BOLT. SHEARED. (CAN) DURING CRUISE FLIGHT, THE ACFT DEVELOPED A SUDDEN AND SEVERE VIBRATION. THE PILOT IMMEDIATELY LANDED AND SHUTDOWN. INSPECTION OF THE ACFT SHOWED THE INBD 
- [SDR CA130326007](https://openairdocs.org/sdr/CA130326007), Mar 26, 2013: NUT. DAMAGED. (CAN) DURING SCHEDULED MAINTENANCE OF TAIL ROTOR DRIVESHAFT, NEW BOLTS AND NUTS BEING INSTALLED, A NEW NUT WAS FOUND TO HAVE NO SELF LOCKING ABILITY ON ANY BOLT
- [SDR CA130212025](https://openairdocs.org/sdr/CA130212025), Feb 12, 2013: FUEL CELL. LEAKING. (CAN) FUEL CELL FOUND WEEPING FROM MULTIPLE LOCATIONS IN THE MIDDLE OF THE SIDES. ACFT FUEL RT FUEL CELL HAD A SLOW LEAK SO THE CELL WAS REMOVED AND INSPECTED. 
- [SDR CA130212027](https://openairdocs.org/sdr/CA130212027), Aug 14, 2012: GASKET. BLOWN. (CAN) WHILE IN CRUISE FLIGHT THE PILOT GOT AN INDICATION OF NO TRANSMISSION OIL PRESSURE ON THE WARNING LIGHT AND PRESSURE GAUGE. HE PROCEEDED TO LAND. WHEN HE 
- [SDR CA110727004](https://openairdocs.org/sdr/CA110727004), Jul 19, 2011: BEARING. FAILED. UPON ROUTINE INSP OF MAIN ROTOR TRANSMISSION ASSY INTERNAL WAFER FILTER, THE ON SITE AME DISCOVERED AN UNUSUALLY LARGE QUANTITY OF FERROUS METAL. FURTHER INVEST
- [SDR CA110516030](https://openairdocs.org/sdr/CA110516030), May 16, 2011: PANEL. DELAMINATED. DURING A VISUAL INSPECTION OF THE ACFT THE ENGINE DECK WAS FOUND TO BE DELAMINATED AND THE HONEYCOMB WAS FOUND TO BE SOFT IN THE ENTIRE PANEL. PANEL WAS REMOVED
- [SDR CA110516029](https://openairdocs.org/sdr/CA110516029), May 16, 2011: PANEL. DELAMINATED. DURING A VISUAL INSPECTION OF THE ABOVE NOTED ACFT THE CENTER ROOF SECTION WAS FOUND SEVERLY DELAMINATED. THE ROOF PANEL WAS REMOVED AND THE AREA FUTHER INSPECT
- [SDR CA110204009](https://openairdocs.org/sdr/CA110204009), Jan 31, 2011: VOLT REGULATOR. FAILED. DURING CRUISE FLIGHT THE PILOT NOTICED THE AMMETER FLUCTUATE AND THE GENERATOR LIGHT FLICKER. THE PILOT BEGAN TO DESCEND WHEN THE GENERATOR LIGHT, LT BOOST PUMP
- [SDR CA100607005](https://openairdocs.org/sdr/CA100607005), Jun 2, 2010: BEARING. ROUGH. NEW BEARING (PN P9103PPFS381A) PURCHASED FROM MFG, FOUND UNSERVICABLE, DUE TO LACK OF LUBRICATION AND ROUGH OPERATION. PART SCRAPPED AND WARRANTY RECEIVED FROM 
- [SDR CA100809003](https://openairdocs.org/sdr/CA100809003), May 29, 2010: BEARING. DEFECTIVE. DURING A FIRE MISSION, WITH THE BAMBI IN THE WATER GETTING FILLED ON A 100 FOOT LONG LINE, THE PILOT LOST AUTHORITY OF THE TAIL ROTOR CAUSING THE ACFT TO PERFOR
- [SDR CA100809002](https://openairdocs.org/sdr/CA100809002), May 19, 2010: BALANCE WEIGHT. SEPARATED. ACFT WAS IN CRUISE FLIGHT WHEN THE TRANSMISSION OIL PRESSURE WARNING LIGHT ILLUMINATED. PILOT CARRIED OUT AN UNSCHEDULED LANDING. AT THE TIME OF ENG SHUTDOWN, T
- [SDR CA090512011](https://openairdocs.org/sdr/CA090512011), May 8, 2009: BULKHEAD. CRACKED. (CAN) DURING A VISUAL INSP, A CRACK WAS FOUND AT THE BOTTOM OF THE RT ANGLE AT TAILBOOM TO FUSELAGE JUNCTION (PN 204-030-713-101). AFTER REMOVAL OF THE TAILBOOM
- [SDR CA081208003](https://openairdocs.org/sdr/CA081208003), Dec 6, 2008: CAP. WORN. (CAN) PART FOUND TO HAVE UNAPPROVED MODIFICATION EMBODIED AFTER PART REMOVAL FROM THE AIRCRAFT WHEN COMPARED TO OEM PART. SUBSEQUENT INVESTIGATION BY QAM MANAGE
- [SDR CA081017008](https://openairdocs.org/sdr/CA081017008), Oct 3, 2008: LONGERON. CRACKED. (CAN) DURING A VISUAL INSPECTION OF THE ACFT THE AME NOTICED A CRACK IN THE UPPER LT TAILBOOM LONGERON APROX. 3 INCHES AFT OF THE TAILBOOM ATTACHMENT FITTING. A
- [SDR CA071010005](https://openairdocs.org/sdr/CA071010005), Aug 28, 2007: BLADE. CRACKED. (CAN) ON TUESDAY THE 28TH OF AUGUST 2007, AT APPROX 19:00, LANDED AT THE STAGING AREA. THE PILOT COMMENTED THAT THERE WAS A VIOLENT LATERAL VIBRATION. AT THIS T
- [SDR CA070828004](https://openairdocs.org/sdr/CA070828004), Aug 21, 2007: BEARING. WORN. (CAN) PILOT WAS FLYING HELICOPTER AND FELT TWO SLIGHT YAWS TO THE RT APPROXIMATELY 30 TO 40 SECONDS APART. AT FIRST THE PILOT SUSPECTED IT MIGHT HAVE BEEN A GUS
- [SDR CA070506001](https://openairdocs.org/sdr/CA070506001), Apr 23, 2007: NUT. DAMAGED. (CAN) ON APRIL 23, 2007 DURING A TEST FLIGHT FOR MAINTENANCE THAT WAS PERFORMED, THE PILOT EXPERIENCED AN UNCONTROLLED YAW TO THE RIGHT WHILE IN A 4 FOOT HOVER.
- [SDR CA070122011](https://openairdocs.org/sdr/CA070122011), Jan 22, 2007: COLLECTIVE STICK. RATCHETING. (CAN) PILOT COMPLAINED OF RATCHETING FEEL TO COLLECTIVE CONTROL STICK. AIRCRAFT RETURNED TO BASE. INSPECTION REVEALED THAT THE COLLECTIVE FRICTION SURFACE ROLL 
- [SDR CA060818004](https://openairdocs.org/sdr/CA060818004), Aug 14, 2006: BOLT. LOOSE. (CAN) DURING A 100 HOUR INSPECTION THE ENGINEER NOTED A LARGE AMOUNT OF PLAY IN THE CLEVIS OF THE TAIL ROTOR FLIGHT CONTROL ROD. INVESTIGATION REVEALED AN UNDER
- [SDR CA060605010](https://openairdocs.org/sdr/CA060605010), May 13, 2006: TRANSMISSION. MAKING METAL. (CAN) METAL PARTICLES FOUND IN TRANSMISSION INTERNAL FILTER AFTER ROUTINE INSPECTION. NO CHIP LIGHT INDICATION. OIL DRAINED WITH NEW FILTER INSTALLED, AIRCRAFT 
- [SDR CA050715002](https://openairdocs.org/sdr/CA050715002), Jul 10, 2005: TURNBUCKLE. UNSECURE. LOCKWIRE LEFT UNLOCKWIRED RESULTING IN TURNBARREL BECOMING UNDONE RESULTING IN TAILROTOR PITCH CHANGE FAILURE. SPEED RIGS WERE LOCK WIRED ON THE ONE END BUT THE
- [SDR CA050418007](https://openairdocs.org/sdr/CA050418007), Apr 11, 2005: RELAY. DEFECTIVE. ON SHUTDOWN ENGINE CONTINUED TO MOTOR OVER SLOWLY. CONTACTS STUCK. RCR REPLACED AND PROBLEM SOLVED.
- [SDR CA050418008](https://openairdocs.org/sdr/CA050418008), Apr 8, 2005: NUT. CRACKED. UPON INSP NOTICED CRACKED JAN NUT ON LINEAR ACTUATOR.
- [SDR CA050418006](https://openairdocs.org/sdr/CA050418006), Apr 4, 2005: HOUSING. WORN. (CAN) DURING INSPECTION THE TAIL ROTOR CONTROL WAS REMOVED AND INSPECTED FOR WEAR. WEAR WAS FOUND BEYOND LIMITS IN THE HOUSING. THIS ITEM IS A 1000 HOUR OVERHAU
- [SDR CA050427008](https://openairdocs.org/sdr/CA050427008), Apr 1, 2005: BLADE. DAMAGED. VOID, CHORDWISE STATION 155 TO 157, HALF INCH WIDE THREE INCHES LONG. BELL HELICOPTER VERDICT THAT BLADE STILL SERVICEABLE. BHT ALLOWS VOID IN THIS AREA. 6 INCH
- [SDR CA040901005](https://openairdocs.org/sdr/CA040901005), Jul 18, 2004: VOLT REGULATOR. FAILED. (CAN) VOLTAGE REGULATOR DELIVERING OVER 30 VOLTS. THE AIRCRAFT WAS READY TO TAKE OFF WHEN THE PILOT SMELLED A STRONG ODOR IN THE COCKPIT. ASSUMING IT WAS THE BA
- [SDR CA040901003](https://openairdocs.org/sdr/CA040901003), Jul 4, 2004: BLADE. CRACKED. (CAN) MAIN ROTOR BLADE FOUND CRACKED ON THE TOP SURFACE 90 INCHES FROM THE TIP. ABOUT 70 HOURS BEFORE, A CRACK ON THE BLADE PAINT WAS FOUND, AT THAT TIME NO CRA
- [SDR CA040209012](https://openairdocs.org/sdr/CA040209012), Jan 27, 2004: SHAFT. WORN. (CAN) FUEL CONTROL RECEIVED FROM CUSTOMER FOR INSPECTION FOLLOWING PREVIOUS RECORDS ABOUT PUMP FAILURE (WSDR 20040128006). FUEL CONTROL HAS TSO- 3195.3 AND WAS 
- [SDR CA040203011](https://openairdocs.org/sdr/CA040203011), Jan 27, 2004: SHAFT. WORN. (CAN) UPON SUSPECTING A PROBLEM WITH FUEL CONTROL UNIT. REMOVED FCU FROM THE ENGINE TO INSPECT THE SPLINES IAW MFG SBT5313-107. FOUND THE INTERNAL SPLINES KNIFE
- [SDR CA030923010](https://openairdocs.org/sdr/CA030923010), Sep 12, 2003: YOKE. CRACKED. (CAN) TAIL ROTOR HUB ASSY WAS SENT FOR OVERHAUL. YOKE WAS SENT FOR NDT AS PART OF O/H AND WAS FOUND TO BE CRACKED.
- [SDR CA040301002](https://openairdocs.org/sdr/CA040301002), Aug 17, 2003: COMPRESSOR. FAILED. (CAN) THE AIRCRAFT DEPARTED A STAGING AREA, SHORTLY AFTER TAKEOFF, THE AIRCRAFT HAD AN ENGINE FAILURE AND CRASHED IN TALL TREES. THE PILOT WAS THE ONLY OCCUPANT
- [SDR CA030610011](https://openairdocs.org/sdr/CA030610011), Jun 7, 2003: SPAR. CRACKED. (CAN) ENGINEER OPENED TAIL ROTOR DRIVESHAFT COVER TO CHANGE COUPLINGS AND FOUND A CRACK HAD DEVELOPED IN THE VERTICAL FIN SPAR. STARTING AT THE TOP LIGHTENING H
- [SDR CA030317016](https://openairdocs.org/sdr/CA030317016), Mar 14, 2003: NUT. CRACKED. (CAN) ON VISUAL INSPECTION NUT WAS FOUND TO BE CRACKED AT WORM GEAR THREAD. THESE PARTS HAVE A 1000 HR NDT INSPECTION. THIS COMPANY INCLUDE A 300 HR VISUAL THIS
- [SDR CA030421005](https://openairdocs.org/sdr/CA030421005), Jan 31, 2003: LONGERON. CRACKED. (CAN) MODIFICATION OF THE DOOR ASSEMBLY WAS COMPLETED PRIOR IAW BHT. TB204-79-11. THE CRACKED PIECES WERE REPLACED WITH NEW PIECES AND REINSTALLED IAW TB 204-79
- [SDR CA030421004](https://openairdocs.org/sdr/CA030421004), Jan 31, 2003: LONGERON. CRACKED. (CAN) UPPER LT ATTACH LONGERON CRACKED AFT OF HOT BONDED DOUBLER. CRACK APPEARS TO HAVE STARTED AT A RIVET HOLE. THE CRACK WAS DISCOVERED DURING A ENGINE REMOVA
- [SDR CA021105012](https://openairdocs.org/sdr/CA021105012), Nov 4, 2002: BELLCRANK. CRACKED. (CAN) AT 1000 HR INSPECTION BELLCRANK FOR THE CYCLIC WAS REMOVED FOT GREASING OF THE BEARINGS. BELLCRANK WAS FOUND TO BE CRACKED AT ONE BEARING. CRACK WAS COMPL
- [SDR CA021003007](https://openairdocs.org/sdr/CA021003007), Sep 13, 2002: HOSE. LEAKING. (CAN) HOSE ASSEMBLY FAILED RESULTING IN LOSS OF HYDRAULIC FLUID. THE LOSS OF FLUID RESULTED IN LOSS OF HYDRAULIC BOOST TO FLIGHT CONTROLS. AIRCRAFT WAS LANDED U
- [SDR CA020918006](https://openairdocs.org/sdr/CA020918006), Sep 6, 2002: BULKHEAD. CRACKED. (CAN) THE ROTOR CONTROL BELLCRANK BULKEAD CRACKED IN MULTIPLE PLACES.
- [SDR CA020918010](https://openairdocs.org/sdr/CA020918010), Sep 2, 2002: BULKHEAD. CRACKED. (CAN) T/R FLIGHT CONTROL BELLCRANK SUPPORT ATTACHES TO BULKHEAD. THE BULKHEAD IS REINFORCED BY LOWER ANGLE AND UPPER ANGLE, SUSPECT THAT THE LOWER ANGLE CRACKED
- [SDR CA011109007](https://openairdocs.org/sdr/CA011109007), Oct 24, 2001: SEGMENT. MISSING. (CAN) UPON INSTALLATION OF THE NEW CHAIN, THE ENGINEER NOTICED A SPACE BETWEEN SOME CHAIN LINKS. CHAIN IS MISSING A SEGMENT.
- [SDR CA010625047](https://openairdocs.org/sdr/CA010625047), May 25, 2001: SKIN. CRACKED. (CAN) CRACK IN SKIN DUE TO BROKEN STIFFENER INSIDE FIN. APPROX LOCATION IS FSTA 444.75, WATERINE 85 RIGHT BUTTLINE 3.0. STIFFENER P/N 205-030-899-036 ALSO RIB P
- [SDR CA000906003](https://openairdocs.org/sdr/CA000906003), Aug 16, 2000: SERVO. FAILED. (CAN) THE PILOT FELT A FEEDBACK IN THE CYCLIC STICK IN THE FORWARD RIGHT HAND QUADRANT. THIS FEEDBACK WAS NOT SATISFACTORY TO THE AIRCRAFT TYPE. THE RIGHT HAND 

All 77: https://openairdocs.org/model/bell-204-b/reports.md

## STCs that may be installed (OpenAirDocs) (107, first 50)

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 SR12427IB](https://openairdocs.org/stc/SR12427IB): Installation of an AEM MTP136D Panel Mount FM Transceiver. Anodyne Electronics Manufacturing Corporation
- [STC SR02270SE](https://openairdocs.org/stc/SR02270SE): Fabrication and installation of Geneva Aviation Audio System. AEM USA Inc
- [STC SR02444SE](https://openairdocs.org/stc/SR02444SE): Installation of P178 Failsafe Audio Mixer. AEM USA Inc
- [STC SR12332SE](https://openairdocs.org/stc/SR12332SE): Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System. Mechanical Specialties, LLC
- [STC SH1201SO](https://openairdocs.org/stc/SH1201SO): Installation P/N 364-83300-1 (Standard Skid Gear) or P/N 364-83300-3 (High Skid Gear). This Wire Strike Protection System. Magellan Aerospace
- [STC SR04465NY](https://openairdocs.org/stc/SR04465NY): Installation of the iPad Mount. Avio Design Group Inc
- [STC SR12072IB](https://openairdocs.org/stc/SR12072IB): Manufacturing and Installation of Cargo Hold Nets; Maintenance must be in accordance with ICARUS Aero Inc. Instructions for Continued Airworthiness as shown on the attached FAA AML No. SR12072IB. Icarus Aero Inc
- [STC SR04662CH](https://openairdocs.org/stc/SR04662CH): Installation of Luma Technologies LT-4205 20 Station Integrated LED Display Panel. Luma Technologies LLC
- [STC SH4056NM](https://openairdocs.org/stc/SH4056NM): Installation of pneumatic door actuators. Dart Aerospace USA Inc
- [STC SR01865SE](https://openairdocs.org/stc/SR01865SE): Fabrication and installation of FastFin System. BLR Aerospace LLC
- [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 SR00144DE](https://openairdocs.org/stc/SR00144DE): Installation of an upgraded 42 degree tail rotor gearbox. Midwest Aerospace TC LLC
- [STC SR09202RC](https://openairdocs.org/stc/SR09202RC): Installation of a vertical fin spar. Midwest Aerospace TC LLC
- [STC SH400NW](https://openairdocs.org/stc/SH400NW): Installation of left hand bubble door with or without duplicate engine instruments. WSH, LLC
- [STC SR00058IB](https://openairdocs.org/stc/SR00058IB): Installation of J301A Audio Controller. Alpine Aerotech LP
- [STC SR00047IB](https://openairdocs.org/stc/SR00047IB): Installation of VIH Aerospace (VIHA) Pulse Light. VIH Aerospace Inc
- [STC SR00713SE](https://openairdocs.org/stc/SR00713SE): Installation of Onboard Systems International Cargo Hook Kit. Onboard Systems International
- [STC SH5690NM](https://openairdocs.org/stc/SH5690NM): Installation of Advanced Technology Aircraft Co. engine barrier filter. WSH, LLC
- [STC SR01903NY](https://openairdocs.org/stc/SR01903NY): Installation of a modified co-pilot seat. Transwest Helicopters Ltd
- [STC SH5707NM](https://openairdocs.org/stc/SH5707NM): Fabrication of Onboard Systems Model 200-088-03 or 200-088-04 (without Load Weight) or 200-089-03, -04, -05 or -06 (with Load Weight) cargo hook suspension systems. Onboard Systems International
- [STC SH5737NM](https://openairdocs.org/stc/SH5737NM): Replacement of Bell magnesium cargo hook bumper and ring Part Nos. 204-072-901-1 or -3, and 204-072-905-3, respectively, with Onboard bumper ring kit No. 210-092-00. Fabrication of Onboard Systems Model 210-092-00 bumper ring kit. Onboard Systems International
- [STC SH5758NM](https://openairdocs.org/stc/SH5758NM): Fabrication of the Onboard Model 200-095-00 Multi-Channel Electrical Slip-Ring Kit. Onboard Systems International
- [STC SR00277SE](https://openairdocs.org/stc/SR00277SE): Fabrication of Onboard Systems Model 528-002-00 or 528-002-01 cargo hook. Onboard Systems International LLC
- [STC SR00699SE](https://openairdocs.org/stc/SR00699SE): Fabrication of Onboard Systems Model 200-246-00 cargo hook kit. Onboard Systems International
- [STC SR02492LA](https://openairdocs.org/stc/SR02492LA): Installation of a Helicopter Technology Company main rotor blade assembly. Helicopter Technology Co
- [STC SR04517NY](https://openairdocs.org/stc/SR04517NY): The Forward and Aft Crew Door Rod Assembly Replacement. Transwest Helicopters Ltd
- [STC SA04465NY](https://openairdocs.org/stc/SA04465NY): Installation of the iPad Mount. Avio Design Group Inc
- [STC SR04403NY](https://openairdocs.org/stc/SR04403NY): Installation of the Trig Avionics TT22 ADS-B Transponder System. Maxcraft Avionics Ltd
- [STC SR04404NY](https://openairdocs.org/stc/SR04404NY): Installation of the Trig Avionics TY92 VHF Communications System. Maxcraft Avionics Ltd
- [STC SR00911NY](https://openairdocs.org/stc/SR00911NY): Installation of Vertical Reference Door with left seat operation provisions. Dart Aerospace Ltd
- [STC SR01446NY](https://openairdocs.org/stc/SR01446NY): Installation of Serviceability Kit: Auxiliary cowl latches, cockpit door wear pads and cabin door handle. Dart Aerospace Ltd
- [STC SR02094NY](https://openairdocs.org/stc/SR02094NY): Installation of GPS Receiver and Gimbal Mount System. Dart Aerospace Ltd
- [STC SR00798SE](https://openairdocs.org/stc/SR00798SE): Fabrication of BLR Aerospace (BLR) tail boom mounted strakes. BLR Aerospace LLC
- [STC SR00173SE](https://openairdocs.org/stc/SR00173SE): Installation of Concorde Battery P/N RG-380E/40. Concorde Battery Corporation
- [STC SR03408CH](https://openairdocs.org/stc/SR03408CH): Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103. Airwolf Aerospace LLC
- [STC SR02238AK](https://openairdocs.org/stc/SR02238AK): Installation of Chelton Flight Systems FlightLogic EFIS. Genesys Aerosystems, Inc
- [STC SR02413LA](https://openairdocs.org/stc/SR02413LA): Installation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000. AKV Inc
- [STC SR02289LA](https://openairdocs.org/stc/SR02289LA): Installation of Apical Industries, Inc. Cable Cutters Kit. Apical Industries, Inc. dba Dart Aerospace
- [STC ST04270AT](https://openairdocs.org/stc/ST04270AT): Install the VTOL ASSALT V3 Windscreen Laminate Kit. VTOL LLC
- [STC SH5122NM](https://openairdocs.org/stc/SH5122NM): Installation of Howell H2900K-436 Exhaust Gas Temperature Indicator. Hillsboro Aviation Inc
- [STC SH5797NM](https://openairdocs.org/stc/SH5797NM): Installation, maintenance, and operation of an engine wash kit. Hillsboro Aviation Inc
- [STC SR02407SE](https://openairdocs.org/stc/SR02407SE): Installation of Geneva Aviation 28 - 14 VDC Power Converter. AEM USA Inc
- [STC SR00767SE](https://openairdocs.org/stc/SR00767SE): Fabrication of Helipro spar replacement system. Vector Aerospace Helicopter Services USA Inc
- [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 SH3808SW](https://openairdocs.org/stc/SH3808SW): Installation of tail light fairing assembly ERA Dwg. 41233-100-100, detail of tail light fairing assembly on ERA Dwg. 41233-100-001. Apical Industries Inc. dba Dart Aerospace
- [STC SR03371CH](https://openairdocs.org/stc/SR03371CH): Installation of NASI Supplemental Air Conditioning Module. National Aircraft Service Inc
- [STC SR02707NY](https://openairdocs.org/stc/SR02707NY): Installation of Marathon PC-251 or KGS SPC-10 Solid State Inverters. Rilpa Enterprises, Ltd
- [STC SR02989NY](https://openairdocs.org/stc/SR02989NY): Installation of the Cargo Hook Retainer. VIH Aerospace Inc
- [STC SR01742NY](https://openairdocs.org/stc/SR01742NY): Installation of extended height landing gear. Dart Aerospace Limited
- [STC SR03339NY](https://openairdocs.org/stc/SR03339NY): Installation of Latitude Technologies IONODE Flight Data Monitoring System. Latitude Technologies Corporation

All 107: https://openairdocs.org/model/bell-204-b/stcs.md

## The same model under other registry codes

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

- [Bell-Cirello 204-B](https://openairdocs.org/model/bell-cirello-204-b): 0 registered aircraft, registry code 1181403

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