# Robinson Helicopter R66

- Type: Aircraft model (FAA registry)
- Registry code: 7640130
- Manufacturer (registry): ROBINSON HELICOPTER CO
- Model: R66
- Aircraft type: Rotorcraft
- Category: Rotorcraft
- Engines: 1 · Turbo-shaft
- Seats: 5
- Weight class: Up to 12,499 lb
- Certification: Type certificated
- Data sheet: [TCDS R00015LA](https://openairdocs.org/tcds/R00015LA) (OpenAirDocs)
- Holder: Robinson Helicopter Company
- Registered aircraft: 421
- Page: https://openairdocs.org/model/robinson-helicopter-r66

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 2024-20-07](https://openairdocs.org/ad/2024-20-07): Emergency Equipment; Emergency Flotation Section · Apical Emergency Float Kit, P/N 20498 (STC SR00780LA or 12 others). Effective Dec 5, 2024
- [AD 2024-04-02](https://openairdocs.org/ad/2024-04-02): Tail Rotor Blades · Robinson Helicopter R22, R22 ALPHA, R22 BETA and 4 more. Effective Apr 2, 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 2022-19-12](https://openairdocs.org/ad/2022-19-12): Tail Rotor Blades · Robinson Helicopter R44, R44 II and R66. Effective Oct 20, 2022
- [AD 2021-04-12](https://openairdocs.org/ad/2021-04-12): Tail Rotor Drive Shaft · Robinson Helicopter R66. Effective Apr 12, 2021
- [AD 2019-07-02](https://openairdocs.org/ad/2019-07-02): Engine Oil Storage (Airframe Furnished) · Robinson Helicopter R66. Effective May 17, 2019
- [AD 2016-26-04](https://openairdocs.org/ad/2016-26-04): Main Rotor Blades · Robinson Helicopter R44, R44 II and R66. Effective Feb 8, 2017

Historical (superseded or no longer in force):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

## Information bulletins (advisory) (5)

- [SAIB AIR-22-03](https://openairdocs.org/saib/AIR-22-03): Robinson Helicopter Company Model R22, R44, and R66 Helicopters; Emergency Locator Transmitter Retention. Issued Mar 3, 2022
- [SAIB AIR-21-14](https://openairdocs.org/saib/AIR-21-14): Robinson R44 and R66 HeliSAS Autopilot/Garmin Primary Flight Display (PFD) Interface. Issued Aug 24, 2021
- [SAIB AIR-21-11](https://openairdocs.org/saib/AIR-21-11): ROTORCRAFT SERVO SYSTEM (JASC 6730). Issued Jul 22, 2021
- [SAIB SW-20-01](https://openairdocs.org/saib/SW-20-01): Electrical Power System - Battery Electrolyte Leakage. Issued Mar 6, 2020
- [SAIB SW-15-08R1](https://openairdocs.org/saib/SW-15-08R1): Robinson R44 and R44 Main Rotor Blades. Issued Mar 31, 2015

## Registered aircraft (421, first 50)

- [N100KR](https://openairdocs.org/aircraft/N100KR): [Jjj Holdings LLC](https://openairdocs.org/faa-owner/JJJ%20HOLDINGS%20LLC), [Eugene, MO](https://openairdocs.org/faa-place/MO/Eugene), built 2025, S/N 1458
- [N102SW](https://openairdocs.org/aircraft/N102SW): [Georgia Helicopter Leasing Corp](https://openairdocs.org/faa-owner/GEORGIA%20HELICOPTER%20LEASING%20CORP), [Douglasville, GA](https://openairdocs.org/faa-place/GA/Douglasville), built 2012, S/N 0106
- [N105KY](https://openairdocs.org/aircraft/N105KY): [Robinson Helicopter Co](https://openairdocs.org/faa-owner/ROBINSON%20HELICOPTER%20CO), [Torrance, CA](https://openairdocs.org/faa-place/CA/Torrance), S/N 1557
- [N108GD](https://openairdocs.org/aircraft/N108GD): [330am Holding Corp](https://openairdocs.org/faa-owner/330AM%20HOLDING%20CORP), [Dover, DE](https://openairdocs.org/faa-place/DE/Dover), built 2025, S/N 1464
- [N10LK](https://openairdocs.org/aircraft/N10LK): [Helius Aircraft Service LLC](https://openairdocs.org/faa-owner/HELIUS%20AIRCRAFT%20SERVICE%20LLC), [Conroe, TX](https://openairdocs.org/faa-place/TX/Conroe), built 2022, S/N 1193
- [N10MW](https://openairdocs.org/aircraft/N10MW): [Jk Aviation LLC](https://openairdocs.org/faa-owner/JK%20AVIATION%20LLC), [Grosse Ile, MI](https://openairdocs.org/faa-place/MI/Grosse%20Ile), built 2020, S/N 0989
- [N111JD](https://openairdocs.org/aircraft/N111JD): [Albert Hall Co LLC](https://openairdocs.org/faa-owner/ALBERT%20HALL%20CO%20LLC), [Port Angeles, WA](https://openairdocs.org/faa-place/WA/Port%20Angeles), built 2018, S/N 0843
- [N113WC](https://openairdocs.org/aircraft/N113WC): [Rebel One LLC](https://openairdocs.org/faa-owner/REBEL%20ONE%20LLC), [Dover, DE](https://openairdocs.org/faa-place/DE/Dover), built 2024, S/N 1397
- [N114AF](https://openairdocs.org/aircraft/N114AF): [Ne Ia Helicopter LLC](https://openairdocs.org/faa-owner/NE%20IA%20HELICOPTER%20LLC), [Tekamah, NE](https://openairdocs.org/faa-place/NE/Tekamah), built 2012, S/N 0237
- [N11SR](https://openairdocs.org/aircraft/N11SR): [M3p Interests LLC](https://openairdocs.org/faa-owner/M3P%20INTERESTS%20LLC), [Missoula, MT](https://openairdocs.org/faa-place/MT/Missoula), built 2024, S/N 1384
- [N11ZG](https://openairdocs.org/aircraft/N11ZG): [White Star Marine Services LLC](https://openairdocs.org/faa-owner/WHITE%20STAR%20MARINE%20SERVICES%20LLC), [Basalt, CO](https://openairdocs.org/faa-place/CO/Basalt), built 2017, S/N 0769
- [N126AG](https://openairdocs.org/aircraft/N126AG): [Oak View Capital LLC](https://openairdocs.org/faa-owner/OAK%20VIEW%20CAPITAL%20LLC), [Brookhaven, MS](https://openairdocs.org/faa-place/MS/Brookhaven), built 2019, S/N 0933
- [N12LK](https://openairdocs.org/aircraft/N12LK): [Robinson Helicopter Co](https://openairdocs.org/faa-owner/ROBINSON%20HELICOPTER%20CO), [Torrance, CA](https://openairdocs.org/faa-place/CA/Torrance), S/N 1558
- [N133LG](https://openairdocs.org/aircraft/N133LG): [Rotor Wash LLC](https://openairdocs.org/faa-owner/ROTOR%20WASH%20LLC), [Alton Bay, NH](https://openairdocs.org/faa-place/NH/Alton%20Bay), built 2026, S/N 1506
- [N133MM](https://openairdocs.org/aircraft/N133MM): [Apex Helicopters LLC](https://openairdocs.org/faa-owner/APEX%20HELICOPTERS%20LLC), [Pearland, TX](https://openairdocs.org/faa-place/TX/Pearland), built 2012, S/N 0107
- [N13FR](https://openairdocs.org/aircraft/N13FR): [Robinson Helicopter Co](https://openairdocs.org/faa-owner/ROBINSON%20HELICOPTER%20CO), [Torrance, CA](https://openairdocs.org/faa-place/CA/Torrance), built 2013, S/N 0373
- [N13HT](https://openairdocs.org/aircraft/N13HT): [Mcfly Air LLC](https://openairdocs.org/faa-owner/MCFLY%20AIR%20LLC), [Downers Grove, IL](https://openairdocs.org/faa-place/IL/Downers%20Grove), built 2014, S/N 0491
- [N147JB](https://openairdocs.org/aircraft/N147JB): [Ramair Enterprises LLC](https://openairdocs.org/faa-owner/RAMAIR%20ENTERPRISES%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 2023, S/N 1213
- [N148R](https://openairdocs.org/aircraft/N148R): [Higgins Leasing Inc](https://openairdocs.org/faa-owner/HIGGINS%20LEASING%20INC), [The Woodlands, TX](https://openairdocs.org/faa-place/TX/The%20Woodlands), built 2017, S/N 0783
- [N1498G](https://openairdocs.org/aircraft/N1498G): [Angelone Inc](https://openairdocs.org/faa-owner/ANGELONE%20INC), [Elkhart, IN](https://openairdocs.org/faa-place/IN/Elkhart), built 2013, S/N 0378
- [N152KB](https://openairdocs.org/aircraft/N152KB): [Oklahoma City, OK](https://openairdocs.org/faa-place/OK/Oklahoma%20City), built 2016, S/N 0697, Sale reported
- [N1584](https://openairdocs.org/aircraft/N1584): [Here Be Dragons LLC](https://openairdocs.org/faa-owner/HERE%20BE%20DRAGONS%20LLC), [Bridgton, ME](https://openairdocs.org/faa-place/ME/Bridgton), built 2023, S/N 1248
- [N15KR](https://openairdocs.org/aircraft/N15KR): [Cloudscape LLC](https://openairdocs.org/faa-owner/CLOUDSCAPE%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 2022, S/N 1129
- [N1664U](https://openairdocs.org/aircraft/N1664U): [Jmx Helicopters LLC](https://openairdocs.org/faa-owner/JMX%20HELICOPTERS%20LLC), [Princeton, IL](https://openairdocs.org/faa-place/IL/Princeton), built 2013, S/N 0395
- [N166BZ](https://openairdocs.org/aircraft/N166BZ): built 2018, S/N 0873
- [N166DL](https://openairdocs.org/aircraft/N166DL): [B-Line Air LLC](https://openairdocs.org/faa-owner/B-LINE%20AIR%20LLC), [Malcom, IA](https://openairdocs.org/faa-place/IA/Malcom), built 2013, S/N 0304
- [N166DY](https://openairdocs.org/aircraft/N166DY): [Buckman Holdings LLC](https://openairdocs.org/faa-owner/BUCKMAN%20HOLDINGS%20LLC), [Centralia, MO](https://openairdocs.org/faa-place/MO/Centralia), built 2011, S/N 0080
- [N166FS](https://openairdocs.org/aircraft/N166FS): [Silverhawk Aviation Academy LLC](https://openairdocs.org/faa-owner/SILVERHAWK%20AVIATION%20ACADEMY%20LLC), [Caldwell, ID](https://openairdocs.org/faa-place/ID/Caldwell), built 2014, S/N 0513
- [N166GH](https://openairdocs.org/aircraft/N166GH): [144gh Aviation LLC](https://openairdocs.org/faa-owner/144GH%20AVIATION%20LLC), [Dover, DE](https://openairdocs.org/faa-place/DE/Dover), built 2015, S/N 0667
- [N166GS](https://openairdocs.org/aircraft/N166GS): [Western Sky Aviation LLC](https://openairdocs.org/faa-owner/WESTERN%20SKY%20AVIATION%20LLC), [Scottsdale, AZ](https://openairdocs.org/faa-place/AZ/Scottsdale), built 2015, S/N 0593
- [N166LW](https://openairdocs.org/aircraft/N166LW): [Thompson Flying Service LLC](https://openairdocs.org/faa-owner/THOMPSON%20FLYING%20SERVICE%20LLC), [Charleston, MO](https://openairdocs.org/faa-place/MO/Charleston), built 2017, S/N 0766
- [N166MG](https://openairdocs.org/aircraft/N166MG): [Gallagher Maria Jane](https://openairdocs.org/faa-owner/GALLAGHER%20MARIA%20JANE), [Lakewood Ranch, FL](https://openairdocs.org/faa-place/FL/Lakewood%20Ranch), built 2016, S/N 0694
- [N166PD](https://openairdocs.org/aircraft/N166PD): [City Of Fontana California](https://openairdocs.org/faa-owner/CITY%20OF%20FONTANA%20CALIFORNIA), [Fontana, CA](https://openairdocs.org/faa-place/CA/Fontana), built 2012, S/N 0101
- [N166RH](https://openairdocs.org/aircraft/N166RH): [Whirld Helicopters Inc](https://openairdocs.org/faa-owner/WHIRLD%20HELICOPTERS%20INC), [Sevierville, TN](https://openairdocs.org/faa-place/TN/Sevierville), built 2016, S/N 0708
- [N166RK](https://openairdocs.org/aircraft/N166RK): [Air First LLC](https://openairdocs.org/faa-owner/AIR%20FIRST%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 2012, S/N 0125
- [N166SL](https://openairdocs.org/aircraft/N166SL): [Gaga Heli Corp LLC](https://openairdocs.org/faa-owner/GAGA%20HELI%20CORP%20LLC), [Fort Lauderdale, FL](https://openairdocs.org/faa-place/FL/Fort%20Lauderdale), built 2016, S/N 0726
- [N166SS](https://openairdocs.org/aircraft/N166SS): [Lane Aviation Inc](https://openairdocs.org/faa-owner/LANE%20AVIATION%20INC), [Rosenberg, TX](https://openairdocs.org/faa-place/TX/Rosenberg), built 2024, S/N 1332
- [N16HR](https://openairdocs.org/aircraft/N16HR): [Alcyone Trust Corp Trustee](https://openairdocs.org/faa-owner/ALCYONE%20TRUST%20CORP%20TRUSTEE), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), built 2021, S/N 1074
- [N16KM](https://openairdocs.org/aircraft/N16KM): [Digital Path Aviation LLC](https://openairdocs.org/faa-owner/DIGITAL%20PATH%20AVIATION%20LLC), [Chico, CA](https://openairdocs.org/faa-place/CA/Chico), built 2019, S/N 0962
- [N170PD](https://openairdocs.org/aircraft/N170PD): [Hawaii Pacific Aviation Inc](https://openairdocs.org/faa-owner/HAWAII%20PACIFIC%20AVIATION%20INC), [Kailua Kona, HI](https://openairdocs.org/faa-place/HI/Kailua%20Kona), built 2014, S/N 0526
- [N173KC](https://openairdocs.org/aircraft/N173KC): [Vertical Aviation LLC](https://openairdocs.org/faa-owner/VERTICAL%20AVIATION%20LLC), [North Las Vegas, NV](https://openairdocs.org/faa-place/NV/North%20Las%20Vegas), built 2018, S/N 0847
- [N1767L](https://openairdocs.org/aircraft/N1767L): [Helicrops LLC](https://openairdocs.org/faa-owner/HELICROPS%20LLC), [Flora, IL](https://openairdocs.org/faa-place/IL/Flora), S/N 0044
- [N179RR](https://openairdocs.org/aircraft/N179RR): [Higgins Leasing Inc](https://openairdocs.org/faa-owner/HIGGINS%20LEASING%20INC), [The Woodlands, TX](https://openairdocs.org/faa-place/TX/The%20Woodlands), built 2012, S/N 0179
- [N17DW](https://openairdocs.org/aircraft/N17DW): [Robinson Helicopter Co](https://openairdocs.org/faa-owner/ROBINSON%20HELICOPTER%20CO), [Torrance, CA](https://openairdocs.org/faa-place/CA/Torrance), S/N 1564
- [N17XP](https://openairdocs.org/aircraft/N17XP): [Quagliano Michael D](https://openairdocs.org/faa-owner/QUAGLIANO%20MICHAEL%20D), [Belgrade, MT](https://openairdocs.org/faa-place/MT/Belgrade), built 2022, S/N 1146
- [N184HF](https://openairdocs.org/aircraft/N184HF): [Ne Ia Aviation LLC](https://openairdocs.org/faa-owner/NE%20IA%20AVIATION%20LLC), [Tekamah, NE](https://openairdocs.org/faa-place/NE/Tekamah), built 2012, S/N 0184
- [N193AF](https://openairdocs.org/aircraft/N193AF): [Hana Antoin](https://openairdocs.org/faa-owner/HANA%20ANTOIN), [Lexington, KY](https://openairdocs.org/faa-place/KY/Lexington), S/N 0264
- [N19573](https://openairdocs.org/aircraft/N19573): [Tvpx Aircraft Solutions Inc Trustee](https://openairdocs.org/faa-owner/TVPX%20AIRCRAFT%20SOLUTIONS%20INC%20TRUSTEE), [North Salt Lake, UT](https://openairdocs.org/faa-place/UT/North%20Salt%20Lake), built 2013, S/N 0340
- [N1DX](https://openairdocs.org/aircraft/N1DX): [Ravens Holdings Aviation LLC](https://openairdocs.org/faa-owner/RAVENS%20HOLDINGS%20AVIATION%20LLC), [Reddick, FL](https://openairdocs.org/faa-place/FL/Reddick), built 2015, S/N 0665
- [N20UP](https://openairdocs.org/aircraft/N20UP): [Rsv Rotor Wing LLC](https://openairdocs.org/faa-owner/RSV%20ROTOR%20WING%20LLC), [Iowa City, IA](https://openairdocs.org/faa-place/IA/Iowa%20City), built 2019, S/N 0924

All 421: https://openairdocs.org/model/robinson-helicopter-r66/aircraft.md

## NTSB investigations (35)

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 CEN26FA207](https://openairdocs.org/ntsb/CEN26FA207), May 30, 2026: Robinson Helicopter R66 (N4488H), Dawsonville, GA, substantial damage, 2 fatal, investigation ongoing
- [NTSB CEN26LA203](https://openairdocs.org/ntsb/CEN26LA203), May 27, 2026: Robinson Helicopter R66 (N5488H), Fort Worth, TX, substantial damage. Probable cause: The flight instructor’s delayed remedial action and the student pilot’s failure to maintain helicopter control during hover.
- [NTSB CEN26LA153](https://openairdocs.org/ntsb/CEN26LA153), Mar 27, 2026: Robinson Helicopter R66 (N4059A), Arlington, TX, substantial damage. Probable cause: The pilot’s failure to maintain clearance from terrain during the hover taxi.
- [NTSB CEN26LA119](https://openairdocs.org/ntsb/CEN26LA119), Feb 19, 2026: Robinson Helicopter R66 (N940BH), Graford, TX, substantial damage. Probable cause: The pilot’s failure to maintain sufficient rotor speed during a practice autorotation to soft terrain which resulted in a loss of control and roll over.
- [NTSB WPR26FA031](https://openairdocs.org/ntsb/WPR26FA031), Oct 23, 2025: Robinson Helicopter R66 (N67GA), Ekalaka, MT, substantial damage, 4 fatal, investigation ongoing
- [NTSB CEN25FA367](https://openairdocs.org/ntsb/CEN25FA367), Sep 6, 2025: Robinson Helicopter R66 (N6633L), Lakeville, MN, destroyed, 2 fatal, investigation ongoing
- [NTSB CEN25LA277](https://openairdocs.org/ntsb/CEN25LA277), Jul 22, 2025: Robinson Helicopter R66 (N88911), Maynard, IA, substantial damage, investigation ongoing
- [NTSB WPR25LA199](https://openairdocs.org/ntsb/WPR25LA199), Jun 30, 2025: Robinson Helicopter R66 (N23UP), Tukwila, WA, substantial damage. Probable cause: The pilot’s failure to maintain yaw control during a takeoff to a hover in a gusting crosswind, which resulted in a loss of directional control and a subsequent hard landing.
- [NTSB ERA25LA229](https://openairdocs.org/ntsb/ERA25LA229), Jun 12, 2025: Robinson Helicopter R66 (N633AF), Valparaiso, FL, substantial damage, investigation ongoing
- [NTSB ANC25FA044](https://openairdocs.org/ntsb/ANC25FA044), Jun 4, 2025: Robinson Helicopter R66 (N962MD), Kaparuk, AK, substantial damage, 2 fatal, investigation ongoing
- [NTSB CEN22LA387](https://openairdocs.org/ntsb/CEN22LA387), Aug 16, 2022: Robinson Helicopter R66 (N641RZ), Millville, MN, substantial damage. Probable cause: The pilot’s inadequate inflight planning resulted in impact with a power line.
- [NTSB CEN22LA006](https://openairdocs.org/ntsb/CEN22LA006), Oct 5, 2021: Robinson Helicopter R66 (N266RK), Delta, MO, substantial damage. Probable cause: The pilot’s inadequate inflight planning and his failure to see and avoid a wire which resulted in contact with the wire and subsequent ground impact.
- [NTSB ERA21FA362](https://openairdocs.org/ntsb/ERA21FA362), Sep 16, 2021: Robinson Helicopter R66 (N888DV), Monticello, GA, destroyed, 3 fatal. Probable cause: The pilot’s decision to continue the visual flight rules flight into deteriorating weather conditions during a dark night and over unlit terrain, which resulted in spatial disorientation and a…
- [NTSB CEN21LA421](https://openairdocs.org/ntsb/CEN21LA421), Sep 15, 2021: Robinson Helicopter R66 (N166LW), Reynoldsville, IL, substantial damage. Probable cause: The pilot’s failure to maintain clearance from the wire during low altitude operations in windy conditions.
- [NTSB WPR21FA300](https://openairdocs.org/ntsb/WPR21FA300), Aug 1, 2021: Robinson Helicopter R66 (N7000J), Colusa, CA, destroyed, 4 fatal. Probable cause: The pilot’s abrupt flight control input that led to mast bumping and a subsequent in-flight breakup.
- [NTSB CEN21LA348](https://openairdocs.org/ntsb/CEN21LA348), Jul 30, 2021: Robinson Helicopter R66 (N857TL), Merry, NE, substantial damage. Probable cause: The pilot’s failure to maintain clearance from a wire during a low-level aerial application flight.
- [NTSB ERA21LA270](https://openairdocs.org/ntsb/ERA21LA270), Jun 27, 2021: Robinson Helicopter R66 (N7078V), Waxhaw, NC, substantial damage. Probable cause: The pilot’s failure to maintain clearance from powerlines during a low-level aerial application flight.
- [NTSB ERA21LA171](https://openairdocs.org/ntsb/ERA21LA171), Apr 3, 2021: Robinson Helicopter R66 (N577DD), Palmyra, PA, substantial damage. Probable cause: The pilot’s improper judgment to attempt a flight while impaired by medications, which resulted in the helicopter’s abnormal ground contact, loss of control, and collision with terrain.
- [NTSB CEN21LA154](https://openairdocs.org/ntsb/CEN21LA154), Mar 9, 2021: Robinson Helicopter R66 (N49XB), Duson, LA, substantial damage. Probable cause: The uncertified pilot’s failure to maintain control of the helicopter when encountering a wind gust while hovering to land.
- [NTSB ANC21LA020](https://openairdocs.org/ntsb/ANC21LA020), Mar 3, 2021: Robinson Helicopter R66 (N1767), Kodiak, AK, destroyed, 1 fatal. Probable cause: An impact with ocean waters for reasons that could not be determined based on the available information.
- [NTSB ERA21LA121](https://openairdocs.org/ntsb/ERA21LA121), Jan 30, 2021: Robinson Helicopter R66 (N660TN), Knoxville, TN, substantial damage. Probable cause: The pilot’s failure to maintain directional control of the helicopter, which resulted in rear portion of the right skid contacting the ground and a subsequent dynamic rollover.
- [NTSB ERA20LA220](https://openairdocs.org/ntsb/ERA20LA220), Jun 18, 2020: Robinson R66 (N4QW), Pikeville, NC, substantial damage, 1 fatal. Probable cause: The pilot’s failure to see and avoid a small diameter wire during low altitude agricultural spraying operations. Contributing to the accident was the pilot’s insufficient property survey.
- [NTSB ERA20FA074](https://openairdocs.org/ntsb/ERA20FA074), Jan 10, 2020: Robinson R66 (N450MC), Mechanicsburg, PA, destroyed, 2 fatal. Probable cause: A severe left roll excursion after the onset of pitch and roll oscillations, which were not arrested by the pilot for undetermined reasons. This resulted in main rotor blade contact with the airframe…
- [NTSB GAA20CA052](https://openairdocs.org/ntsb/GAA20CA052), Oct 29, 2019: Robinson R66 (N661CG), Alexandria, LA, substantial damage. Probable cause: The pilot's fixation on the instrument panel, which resulted in a hard landing.
- [NTSB GAA19CA481](https://openairdocs.org/ntsb/GAA19CA481), Aug 2, 2019: Robinson R66 (N1767L), Vandalia, IL, substantial damage. Probable cause: The pilot's failure to maintain clearance from power lines during an agricultural application flight.
- [NTSB CEN19LA123](https://openairdocs.org/ntsb/CEN19LA123), Apr 21, 2019: Robinson R66 (N766WC), St Jacob, IL, substantial damage. Probable cause: The pilot's in-flight collision with an unmarked wire during an aerial application flight; the wire lacked contrast with the surrounding environment.
- [NTSB GAA18CA366](https://openairdocs.org/ntsb/GAA18CA366), Jun 19, 2018: Robinson R66 (N7040P), Cordova, AK, substantial damage. Probable cause: The pilot’s selection of unsuitable terrain for landing, which resulted in impact with brush and a loss of helicopter control.
- [NTSB WPR16FA130](https://openairdocs.org/ntsb/WPR16FA130), Jun 23, 2016: Robinson Helicopter R66 (N117TW), Wikieup, AZ, destroyed, 2 fatal. Probable cause: An encounter with turbulence due to updrafts and/or dust devils that resulted in mast bumping and an in-flight break-up.
- [NTSB GAA16CA290](https://openairdocs.org/ntsb/GAA16CA290), Jun 7, 2016: Robinson Helicopter R66 (N38SL), Beaumont, TX, substantial damage. Probable cause: The non-pilot owner's decision to start the helicopter while awaiting the pilot's arrival, which resulted in a loss of yaw control and a rollover.
- [NTSB WPR16LA075](https://openairdocs.org/ntsb/WPR16LA075), Feb 23, 2016: Robinson Helicopter R66 (N266RH), Torrance, CA, substantial damage. Probable cause: A vibration of the helicopter, which resulted in an autorotation to soft terrain and subsequent impact of the tail boom with the main rotor. The reason for the vibration could not be determined…
- [NTSB ERA15CA079](https://openairdocs.org/ntsb/ERA15CA079), Dec 22, 2014: Robinson Helicopter R66 (N64HF), Henniker, NH, substantial damage. Probable cause: The pilot's failure to maintain aircraft control while landing, which resulted in a collision with a snow bank. Contributing to the accident was ice that covered the landing surface.
- [NTSB CEN15CA039](https://openairdocs.org/ntsb/CEN15CA039), Oct 29, 2014: Robinson Helicopter R66 (N67GA), Baton Rouge, LA, substantial damage. Probable cause: An in-flight bird strike.
- [NTSB ERA13FA336](https://openairdocs.org/ntsb/ERA13FA336), Jul 28, 2013: Robinson R66 (N646AG), Noxen, PA, destroyed, 5 fatal. Probable cause: The pilot's decision to continue VFR flight into night instrument meteorological conditions, which resulted in spatial disorientation and a loss of control.
- [NTSB CEN12FA001](https://openairdocs.org/ntsb/CEN12FA001), Oct 1, 2011: Robinson Helicopter R66 (N266CY), Philip, SD, destroyed, 1 fatal. Probable cause: The in-flight separation of the main rotor mast following a mast bumping event. The reason for the mast bumping event could not be determined due to postaccident damage.
- [NTSB ERA11RA398](https://openairdocs.org/ntsb/ERA11RA398), Jul 12, 2011: Robinson R66 (N810AG), Girardot, Colombia, substantial damage, 2 fatal

## FAA accident and incident reports (34)

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 20260529006409A](https://openairdocs.org/incident/20260529006409A), May 29, 2026: Robinson Helicopter Co R66 (N4488H), Dawsonville, GA, Substantial damage, 2 fatal. Awaiting additional information
- [Accident 20251022016209A](https://openairdocs.org/incident/20251022016209A), Oct 22, 2025: Robinson Helicopter Co R66 (N67GA), Ekalaka, MT, Destroyed, 4 fatal. A witness, who was located about 3/4 mile southeast of the accident site reported that she was inside her residence when she heard the helicopter overflying…
- [Accident 20250906012849A](https://openairdocs.org/incident/20250906012849A), Sep 6, 2025: Robinson Helicopter Co R66 (N6633L), Lakeville, MN, Substantial damage, 2 fatal. The pilot refueled with a 25-gallon top-off before the flights for the day. The helicopter was flying back to its originating airport when the pilot chose an…
- [Accident 20250721014209A](https://openairdocs.org/incident/20250721014209A), Jul 21, 2025: Robinson Helicopter Co R66 (N88911), Maynard, IA, Substantial damage. The pilot's failure to monitor the fuel quantity indicator during the flight led to fuel exhaustion and subsequent power loss causing substantial damage.
- [Accident 20250630008439A](https://openairdocs.org/incident/20250630008439A), Jun 30, 2025: Robinson Helicopter Co R66 (N23UP), Tukwila, WA, Substantial damage. PIC was flying the helicopter under the supervision of a safety pilot (required per insurance company). ATCT video footage showed that after lift-off, the…
- [Accident 20250612009709A](https://openairdocs.org/incident/20250612009709A), Jun 12, 2025: Robinson Helicopter Co R66 (N633AF), Destin, FL, Substantial damage. On 06/12/2025, at approximately 18:44 (l) [privacy data omitted] began a takeoff from Destin Executive Airport (dts), Destin, FL. The aircraft became…
- [Accident 20250604012019A](https://openairdocs.org/incident/20250604012019A), Jun 4, 2025: Robinson Helicopter Co R66 (N962MD), Deadhorse, AK, Destroyed, 2 fatal. On 06/04/2025 at approximately 1700 Alaska local time a FAR 135 air carrier operators Robinson R-66 turbine helicopter made a controlled flight into terrain in…
- [Accident 20220816007829A](https://openairdocs.org/incident/20220816007829A), Aug 16, 2022: Robinson Helicopter Co R66 (N641RZ), Millville, MN, Substantial damage. 2022-08-16 N641RZ Robinson R66 Millville MN [privacy data omitted] part 137 agricultural application struck power line. Airman completed east to west recon of…
- [Accident 20211005017419A](https://openairdocs.org/incident/20211005017419A), Oct 5, 2021: Robinson Helicopter Co R66 (N266RK), Delta, MO, Substantial damage. The pilot was following a canal applying herbicide. A low set of power lines paralleled the canal and the pilot was focused on avoiding those wires. The…
- [Accident 20210915014559A](https://openairdocs.org/incident/20210915014559A), Sep 15, 2021: Robinson Helicopter Co R66 (N888DV), Monticello, GA, Destroyed, 3 fatal. 09/15/2021 - N888DV serial # 1000 operated by [privacy data omitted] traveling from thomasville, Georgia to a unknown destination went missing from radar @…
- [Accident 20210915011519A](https://openairdocs.org/incident/20210915011519A), Sep 15, 2021: Robinson Helicopter Co R66 (N166LW), Reynoldsville, IL, Minor damage. On 9/15/2021 at 1500 hrs N166LW, a Robinson helicopter, model R66, s/n 0766 hit a powerline while spraying the field below, causing damage to one blade and…
- [Accident 20210801021219A](https://openairdocs.org/incident/20210801021219A), Aug 1, 2021: Robinson Helicopter Co R66 (N7000J), Colusa, CA, Destroyed, 4 fatal. On Sunday, August 1st, 2021 at approximately 1254 local a Robinson helicopter R66, N7000J, serial number 0411 was involved in an accident outside Colusa,…
- [Accident 20210730019069A](https://openairdocs.org/incident/20210730019069A), Jul 30, 2021: Robinson Helicopter Co R66 (N857TL), Merry, NE, Substantial damage. On July 30, 2021 at approximately 1230 central daylight time (CDT) a Robinson R66 helicopter was substantially damaged due to impact with terrain after…
- [Accident 20210627008769A](https://openairdocs.org/incident/20210627008769A), Jun 27, 2021: Robinson Helicopter Co R66 (N7078V), Monroe, NC, Substantial damage. On 6/27/2021 at approximately 1142 local time, Robinson R-66, registration number N7078V, piloted by [privacy data omitted], commercial pilot certificate…
- [Incident 20210610006679I](https://openairdocs.org/incident/20210610006679I), Jun 10, 2021: Robinson Helicopter Co R66 (N857TL), Destin, FL, Minor damage. Pilot in command elected to land from steep approach, gusty winds induced settling with power, pilot failed to recognize increasing rate of descent.
- [Accident 20210403007199A](https://openairdocs.org/incident/20210403007199A), Apr 3, 2021: Robinson Helicopter Co R66 (N577DD), Palmyra, PA, Destroyed. Upon landing at Reigle Airport 58N, N577DD, Robinson R66 helicopter, s/n: 675 was destroyed due to a dynamic rollover.
- [Accident 20210309004579A](https://openairdocs.org/incident/20210309004579A), Mar 9, 2021: Robinson Helicopter Co R66 (N49XB), Duson, LA, Substantial damage. Pilot had flown from Louisiana regional airport (kreg) to his house in Duson, LA. He was attempting to land at helipad behind his house and had almost made…
- [Accident 20210302002669A](https://openairdocs.org/incident/20210302002669A), Mar 2, 2021: Robinson Helicopter Co R66 (N1767), Kodiak, AK, Destroyed, 1 fatal. On March 2, 2021 at 1409 AKST, N1767, a Robinson R66, departed merrill field (mri) in anchorage, AK with an intended destination of Kodiak, AK (adq). At…
- [Accident 20210130001879A](https://openairdocs.org/incident/20210130001879A), Jan 30, 2021: Robinson Helicopter Co R66 (N660TN), Knoxville, TN, Substantial damage. On 1/30/2021 at approximately 0930L, N660TN was attempting to take off from a private residence in Knoxville, TN. The aircraft was parked at an approximante…
- [Accident 20200618005999A](https://openairdocs.org/incident/20200618005999A), Jun 18, 2020: Robinson Helicopter Co R66 (N4QW), Pikeville, NC, Destroyed, 1 fatal. Pilot was spraying insecticide and crashed into a field near 320 daw pate road, pilot struck a 5/16 inch steel braided cable. Cable was approximately 100 yards…
- [Accident 20200109000439A](https://openairdocs.org/incident/20200109000439A), Jan 9, 2020: Robinson Helicopter Co R66 (N450MC), Mechanicsburg, PA, Destroyed, 2 fatal. On January 9, 2020, Robinson R66, N450MC, departed martin state airport (mtn), baltimore, Maryland, at 1958 eastern standard time (EST) and was destined for…
- [Accident 20191028020489A](https://openairdocs.org/incident/20191028020489A), Oct 28, 2019: Robinson Helicopter Co R66 (N661CG), Alexandria, LA, Substantial damage. On October 28, 2019, N661CG, a Robinson R-66 serial number 0057, departed a football stadium at Alexandria senior high (ash) in Alexandria, LA. The intended…
- [Accident 20190802013229A](https://openairdocs.org/incident/20190802013229A), Aug 2, 2019: Robinson Helicopter Co R66 (N1767L), Vandalia, IL, Substantial damage. On August 02, 2019 at 1535 local time a Robinson R66 helicopter struck a suspended power line running from east to west in Vandalia, IL. The pilot was…
- [Accident 20190420003099A](https://openairdocs.org/incident/20190420003099A), Apr 20, 2019: Robinson Helicopter Co R66 (N766WC), St Jacob, IL, Substantial damage. On April 20, 2019 at approximately 1915 hours, the Robinson R-66 agricultural helicopter sustained substantial damage and the 7000 hour airline transport pilot…
- [Accident 20180619008269A](https://openairdocs.org/incident/20180619008269A), Jun 19, 2018: Robinson Helicopter Co R66 (N7040P), Cordova, AK, Substantial damage. On 6/19/2018 N7040P a Robinson R-66 helicopter departed Cordova Municipal Airport at 10:30 am with the pilot and 2 pax onboard, destination was a remote…
- [Incident 20160817021709I](https://openairdocs.org/incident/20160817021709I), Aug 17, 2016: Robinson Helicopter Co. R 66 (N5YU), Indiantown, FL, Minor damage. On August 17 2016, the pilot of the helicopter, a Robinson R-66, stated he flew over the Indiantown Airport and came around to do a low approach to a hover on…
- [Accident 20160623010579A](https://openairdocs.org/incident/20160623010579A), Jun 23, 2016: Robinson Helicopter Co R66 (N117TW), Wikieup, AZ, Destroyed, 2 fatal. On June 23, 2016, at about 14:18L, a robertson R66, N117TW, piloted by two ATP rated pilots,crashed near Wikieup, AZ. The aircraft broke up in flight and…
- [Accident 20160607015189A](https://openairdocs.org/incident/20160607015189A), Jun 7, 2016: Robinson Helicopter Co R66 (N38SL), Beaumont, TX, Substantial damage. Owner of aircraft was waiting for pilot to arrive to take a local flight. While waiting for pilot owner decided to start aircraft to use the air conditioner to…
- [Accident 20160223007729A](https://openairdocs.org/incident/20160223007729A), Feb 23, 2016: Robinson Helicopter Co R66 (N266RH), Torrance, CA, Substantial damage. Robinson R66 helicopter was being flown by Robinson test pilot [privacy data omitted] to put some time on systems that Robinson was testing. After liftoff and…
- [Incident 20151124020419I](https://openairdocs.org/incident/20151124020419I), Nov 24, 2015: Robinson Helicopter R66 (N32AW), Sarasota, FL, Minor damage. Robinson Helicopter, N32AW, s/n 0654 had a bird strike at 500 ft AGL, 60 knots enroute to ksrq (Sarasota-Bradenton airport). Bird struck and came through…
- [Accident 20141222021639A](https://openairdocs.org/incident/20141222021639A), Dec 22, 2014: Robinson Helicopter Co R66 (N64HF), Henniker, NH, Substantial damage. PIC stated he arrived at his helipad and it was snow covered. He said the black top area next to the helipad was clear and appeared just to be wet. He hovered…
- [Accident 20130727017149A](https://openairdocs.org/incident/20130727017149A), Jul 27, 2013: Robinson Helicopter Co R66 (N646AG), Noxen, PA, Destroyed, 5 fatal. Pilot and 4 passengers departed tri city airport (czg). At 2150 local time enroute to arner memorial (22N)at approximately 2220 the pilot contacted kavp ATC…
- [Accident 20111001023439A](https://openairdocs.org/incident/20111001023439A), Oct 1, 2011: Robinson Helicopter Co R66 (N266CY), Phillip, SD, Destroyed, 1 fatal. On Saturday October 1, 2001 at 12:30 a Robinson model R66 owned by p p & j LLC had a fatal accident during a cruise flight from gillette, WY to winner, SD. VMC…
- [Accident 20110712028389A](https://openairdocs.org/incident/20110712028389A), Jul 12, 2011: Robinson R-66 (N810AG), Bogota, Destroyed, 2 fatal. On July 12, 2011, the helicopter depar for a local flight. A visual flight plan was filed on July 12, 2011, for a 45 minute flight south ofskgi. The flight…

## Service difficulty reports (47)

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

- [SDR EVGR2024040900002](https://openairdocs.org/sdr/EVGR2024040900002), Apr 9, 2024: SHACKLE. SEIZED. DURING PREFLIGHT INSPECTION, A PILOT NOTICED THAT THE LOWER LEFT LANDING GEAR ASSEMBLY MOUNTING BOLT (NAS6607-20) HAD BEEN TURNING. THIS BOLT MOUNTS THE LANDING
- [SDR YV3R2023100200581](https://openairdocs.org/sdr/YV3R2023100200581), Sep 1, 2023: WIRE HARNESS. MALFUNCTIONED. CUSTOMER REPORTED HARNESS ASSEMBLY P/N: F049-012 MALFUNCTIONED, N1 INDICATOR FLUCTUATING DURING FLIGHT.
- [SDR YV3R2023082800577](https://openairdocs.org/sdr/YV3R2023082800577), Aug 16, 2023: INDICATOR. INOPERATIVE. CUSTOMER REPORTED AIRSPEED INDICATOR P/N: C599-2 WAS INOPERATIVE.
- [SDR YV3R2023063000574](https://openairdocs.org/sdr/YV3R2023063000574), May 17, 2023: SWITCH. DEFECTIVE. CUSTOMER REPORTED SWITCH ASSEMBLY P/N: D799-7 WAS INOPERATIVE.
- [SDR YV3R2023042700557](https://openairdocs.org/sdr/YV3R2023042700557), Apr 10, 2023: CYLINDER. DEFECTIVE. CUSTOMER REPORTED CYLINDER ASSEMBLY P/N: D679-3 PRESSURE GAGE INDICATES ZERO.
- [SDR 2022FA0000702](https://openairdocs.org/sdr/2022FA0000702), Nov 18, 2022: GOVERNOR. BINDING. UPON PERFORMING INSPECTION FOUND POWER TURBINE GOVERNOR CONTROL ARM VERY STIFF TO MOVE THRU ITS RANGE. COMPARED TO ANOTHER PT GOVERNOR INSTALLED ON ITS SISTER S
- [SDR YV3R2022100700543](https://openairdocs.org/sdr/YV3R2022100700543), Sep 8, 2022: NONE. DEFECTIVE. CUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-11 LOW ROTOR WARNING LIGHT AND SOUND (AUDIO) CAME ON DURING THE FIRST FLIGHT.
- [SDR YV3R2022052600529](https://openairdocs.org/sdr/YV3R2022052600529), May 3, 2022: NONE. DEFECTIVE. CUSTOMER REPORTED WARNING UNIT ASSEMBLY P/N: A569-11 WAS INOPERATIVE.
- [SDR YV3R2022021000514](https://openairdocs.org/sdr/YV3R2022021000514), Dec 20, 2021: NONE. NONE. CUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-11 LOW RPM LIGHT NEVER WENT OUT. CORRECTION: UNIQUE CONTROL # YV3R2022021000514, 3B (MANUFACTURER) :
- [SDR YV3R2022021000513](https://openairdocs.org/sdr/YV3R2022021000513), Dec 20, 2021: NONE. DEFECTIVE. CUSTOMER REPORTED WARNING UNIT ASSEMBLY (LOW RPM) P/N: A569-11 LOW RPM LIGHT NEVER WENT OUT.
- [SDR YV3R2021092100495](https://openairdocs.org/sdr/YV3R2021092100495), Sep 16, 2021: SENSOR. FAILED. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-11 FAILURE.
- [SDR YV3R2021052800458](https://openairdocs.org/sdr/YV3R2021052800458), May 19, 2021: WARNING UNIT. DEFECTIVE. CUSTOMER REPORTED WARNING UNIT (LOW RPM) P/N: A569-11 WAS NOT FUNCTIONING CORRECTLY, LOW RPM LIGHT ILLUMINATES WITH HORN SOUNDING.
- [SDR YV3R2021020300429](https://openairdocs.org/sdr/YV3R2021020300429), Jan 29, 2021: DUAL TACHOMETER. DEFECTIVE. CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: F792-1 ROTOR RPM NEEDLE WAS ERRATIC.
- [SDR YV3R2020093000356](https://openairdocs.org/sdr/YV3R2020093000356), Sep 28, 2020: DUAL TACHOMETER. DEFECTIVE. CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: F792-1 INDICATES HIGH.
- [SDR YV3R2020092900355](https://openairdocs.org/sdr/YV3R2020092900355), Sep 24, 2020: DUAL TACHOMETER. DEFECTIVE. CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: F792-1 NEEDLES STICK OCCASIONALLY DURING START-UP.
- [SDR YV3R2020091700348](https://openairdocs.org/sdr/YV3R2020091700348), Sep 14, 2020: DUAL TACHOMETER. DEFECTIVE. CUSTOMER REPORTED DUAL TACHOMETER ASSEMBLY P/N: F792-1 ROTOR NEEDLE WAS PEGGING FULL SCALE WITH POWER APPLIED.
- [SDR YV3R2020082900335](https://openairdocs.org/sdr/YV3R2020082900335), Jul 16, 2020: PUSH-PULL ROD. WORN. CORRECTED (UNIQUE CONTROL #): CUSTOMER REPORTED PUSH-PULL TUBE P/N: C121-17 WAS WORN AT FORWARD GUIDE POSITION.
- [SDR YV3R2020082800335](https://openairdocs.org/sdr/YV3R2020082800335), Jul 16, 2020: PUSH-PULL ROD. WORN. CUSTOMER REPORTED PUSH-PULL TUBE P/N: C121-17 WAS WORN AT FORWARD GUIDE POSITION.
- [SDR YV3R2020062700287](https://openairdocs.org/sdr/YV3R2020062700287), Jun 15, 2020: TACHOMETER. DEFECTIVE. CUSTOMER REPORTED DUAL TACHOMETER P/N: F792-1 N2 NEEDLE IS PEGGED AT 100% WHEN ENGINE IS OFF.
- [SDR YV3R2020060100276](https://openairdocs.org/sdr/YV3R2020060100276), May 11, 2020: SENSOR. INTERMITTENT. CUSTOMER REPORTED FUEL FLOW SENSOR P/N: G768-3 WAS INTERMITTENTLY FAILING.
- [SDR 2019FA0000398](https://openairdocs.org/sdr/2019FA0000398), Dec 9, 2019: ROD END. FATIGUED. F101-4 ELASTOMERIC ROD ENDS ON LOWER ENGINE SUPPORT WELDMENT ARE SHOWING ELASTOMER FATIGUE AFTER 419 HOURS. WILL REPLACE ROD ENDS WITH NEW.
- [SDR 2019FA0000397](https://openairdocs.org/sdr/2019FA0000397), Dec 9, 2019: ROD END. FATIGUED. F101-4 ELASTOMERIC ROD ENDS ON LOWER ENGINE SUPPORT WELDMENT ARE SHOWING ELASTOMER FATIGUE AFTER 486 HOURS. WILL REPLACE ROD ENDS WITH NEW.
- [SDR 2019FA0000396](https://openairdocs.org/sdr/2019FA0000396), Dec 9, 2019: BULKHEAD. CRACKED. CRACK IN F259-2 CABIN BULKHEAD PANEL NEAR RIGHT SIDE F020-1 UPPER FRAME ASSEMBLY ATTACHMENT HOLE. CRACK TRAVELS FROM 11 O'CLOCK TO 3 O'CLOCK POSITION THROUGH CO
- [SDR 2019FA0000395](https://openairdocs.org/sdr/2019FA0000395), Dec 9, 2019: BULKHEAD. CRACKED. CRACK IN F259-2 CABIN BULKHEAD PANEL NEAR RIGHT SIDE F020-1 UPPER FRAME ASSEMBLY ATTACHMENT HOLE. CRACK TRAVELS FROM 11 O'CLOCK TO 3 O'CLOCK POSITION THROUGH CO
- [SDR YV3R201911220214](https://openairdocs.org/sdr/YV3R201911220214), Nov 5, 2019: SENSOR. DEFECTIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IS DEFECTIVE.
- [SDR YV3R2019092400194](https://openairdocs.org/sdr/YV3R2019092400194), Sep 10, 2019: FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IS NOT WORKING.
- [SDR YV3R2019092400193](https://openairdocs.org/sdr/YV3R2019092400193), Sep 10, 2019: FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IN NOT WORKING.
- [SDR YV3R2019092400192](https://openairdocs.org/sdr/YV3R2019092400192), Sep 10, 2019: FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED SENSOR ASSEMBLY P/N: G768-3 IS NOT WORKING.
- [SDR YV3R2019092400191](https://openairdocs.org/sdr/YV3R2019092400191), Sep 10, 2019: HORN. INOPERATIVE. CUSTOMER REPORTED HORN ASSEMBLY P/N: B320-6 DOES NOT WORK.
- [SDR YV3R2019081920164](https://openairdocs.org/sdr/YV3R2019081920164), Aug 2, 2019: TACHOMETER. INACCURATE. CUSTOMER REPORTED DUAL TACHOMETER P/N: F792-1 N2 NEEDLE READS INCONSISTENT (4% LOW, OUT OF SPECIFICATIONS).
- [SDR 2020FA0000044](https://openairdocs.org/sdr/2020FA0000044), Jul 18, 2019: SHAFT. CRACKED. DURING AN ANNUAL INSPECTION OF THE AIRFRAME AND 200 HR INSPECTION OF THE ENGINE, A CRACK IN THE SLINGER RING DISK OF THE ENGINE SHAFT WELDMENT WAS DISCOVERED. T
- [SDR 2020FA0000043](https://openairdocs.org/sdr/2020FA0000043), Jul 18, 2019: RING. CRACKED. DURING AN ANNUAL INSPECTION OF THE AIRFRAME AND 200HR INSPECTION OF THE ENGINE, A CRACK IN THE SLINGER RING DISK OF THE ENGINE SHAFT WELDMENT WAS DISCOVERED. TH
- [SDR CA190814007](https://openairdocs.org/sdr/CA190814007), Jul 17, 2019: CLAMP. RUPTURED. (CAN) INITIAL INSTALLATION OF STARTER/GENERATOR P/N: RR30000412, WITH ORIGINAL QAD CLAMP ALWAYS INSTALLED IN ACCORDANCE WITH MANUFACTURER RECOMMENDATIONS OPERAT
- [SDR YV3R2019062700133](https://openairdocs.org/sdr/YV3R2019062700133), Jun 24, 2019: BEARING. DEFECTIVE. CUSTOMER REPORTED BEARING ASSEMBLY DUST SHIELD SPINS IN BEARING HOUSING.
- [SDR YV3R2019012200105](https://openairdocs.org/sdr/YV3R2019012200105), May 30, 2019: WARNING UNIT. INOPERATIVE. CUSTOMER REPORTED LOW RPM WARNING UNIT P/N: A569-11 IS INOPERATIVE.
- [SDR CA190403018](https://openairdocs.org/sdr/CA190403018), Apr 3, 2019: MOUNT. CRACKED. (CAN) BATTERY MOUNTING SHELF PN G249-1 FOUND CRACKED AT CONTACT WITH BATTERY FWD AND AFT OUTBOARD CORNERS. (TC# 20190403018)
- [SDR YV3R2019012200060](https://openairdocs.org/sdr/YV3R2019012200060), Mar 22, 2019: SENSOR. INOPERATIVE. AUXILIARY FUEL PUMP LIGHT FLASHES CONTINUOUSLY 15 SECONDS AFTER ACTUATION OF SWITCH.
- [SDR YV3R2019031800049](https://openairdocs.org/sdr/YV3R2019031800049), Mar 13, 2019: TACHOMETER. DEFECTIVE. AFTER BEING INSPECTED, TECHNICIAN FOUND NEEDLES WERE STICKING.
- [SDR YV3R2019012200023](https://openairdocs.org/sdr/YV3R2019012200023), Feb 15, 2019: EXHAUST DUCT. CRACKED. CUSTOMER REPORTED ENGINE EXHAUST P/N: F169-1 WAS CRACKED.
- [SDR YV3R2019030500038](https://openairdocs.org/sdr/YV3R2019030500038), Feb 2, 2019: FLOW SENSOR. INOPERATIVE. CUSTOMER REPORTED FLOW SENSOR P/N: G768-3 WAS INOPERATIVE.
- [SDR 2019FA0000004](https://openairdocs.org/sdr/2019FA0000004), Dec 20, 2018: SPAR. CRACKED. MOUNTING BRACKETS LOOSE ON FRONT AND REAR SPARS.
- [SDR 2018FA0000527](https://openairdocs.org/sdr/2018FA0000527), Oct 31, 2018: BATTERY. LEAKING. BATTERY LEAKS FROM AROUND TOP SEALING JOINT BEHIND POSITIVE POST. THIS IS THE THIRD HELICOPTER WITH CORROSION DAMAGE THAT WE HAVE FOUND CAUSED FROM A BATTERY OF
- [SDR 2018FA0000346](https://openairdocs.org/sdr/2018FA0000346), Aug 23, 2018: BATTERY. LEAKING. MECHANIC FOUND SIGNS OF LEAKAGE AND CORROSION BEHIND LOWER AFT PASSENGER SEAT BULKHEAD, SEAT FRAME AREA, BATTERY SHELF, BAGGAGE COMPARTMENT FLOOR. THE AIRCRAFT 
- [SDR 2017FA0000384](https://openairdocs.org/sdr/2017FA0000384), Mar 3, 2017: BLADDER. LEAKING. FUEL BLADDER LEAKS FROM OVER 15 LEAKS, FUEL BLADDER MATERIAL ACTUALLY POROUS UNDER AIR PRESSURE TEST. FUEL WEEPING FROM ALL 6 SIDES OF THE TANK. FOUND LEAK DURI
- [SDR CA140627013](https://openairdocs.org/sdr/CA140627013), Jun 26, 2014: TURBINE WHEEL. FAILED. (CAN) DURING FLIGHT, THE PILOT HEARD AN ABNORMAL NOISE, SAW N1 AND N2 FLUCTUATIONS AND OBSERVED A CHIP LIGHT. HE LANDED IMMEDIATELY USING ENGINE POWER. THE HELI
- [SDR CA140509006](https://openairdocs.org/sdr/CA140509006), May 6, 2014: NUT. CRACKED. (CAN) DURING FIRST 100 HR INSPECTION, SPOTTED GAP, VISIBLE BOLT SHANK, BETWEEN AIRFRAME MOUNTED SPHERICAL BEARING AND F239-2, RT AFT LANDING GEAR STRUT ASSY. FU
- [SDR CA131022003](https://openairdocs.org/sdr/CA131022003), Jul 31, 2013: SWASHPLATE. DAMAGED. (CAN) DURING A 100 HR INSPECTION, WE HAVE FOUND THAT 2 ALLEN BOLTS FROM THE SWASHPLATE WAS CHAFING ON THE SLIDER TUBE. THE DAMAGE WAS LOCATED ON THE FORWARD FAC

## STCs that may be installed (OpenAirDocs) (34)

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 SR02447AK](https://openairdocs.org/stc/SR02447AK): Installation of the ZW Aviation LLC R66 Utility Camera Mount. Gyro-Stabilized Systems LLC
- [STC SR09651RC](https://openairdocs.org/stc/SR09651RC): Installation of Night Vision Goggle (NVG) Compatible Lighting System. REB Technologies Inc
- [STC SR01980WI](https://openairdocs.org/stc/SR01980WI): Installation of Garmin GI 275 Multi-Function Instrument. Garmin International Inc
- [STC SR03512AT](https://openairdocs.org/stc/SR03512AT): Installation of HID Landing and Taxi Lights. Whelen Aerospace Technologies
- [STC SR02553LA](https://openairdocs.org/stc/SR02553LA): Installation of HeliSAS®/Autopilot System. S-TEC Corporation
- [STC SR00017IB](https://openairdocs.org/stc/SR00017IB): Installation of an agricultural spray system. AirLift Technologies Ltd
- [STC SR02447SE](https://openairdocs.org/stc/SR02447SE): Fabrication of Onboard Systems International R66 Cargo Hook Suspension System. Onboard Systems International
- [STC SR02704SE](https://openairdocs.org/stc/SR02704SE): Installation and maintenance of the Sunspot 36 and 46 series lights. AeroLED's Holdings LLC
- [STC SR02736LA](https://openairdocs.org/stc/SR02736LA): Installation of Skid Step. Longhorn Aviation Services LLC
- [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 SR02432NY](https://openairdocs.org/stc/SR02432NY): Installation of Helitowcart Bear Paw Models BP350, BP44 or BP130. Dart Aerospace Ltd
- [STC SR02521AK](https://openairdocs.org/stc/SR02521AK): Installation of bicycle racks. Robbie Rack LLC
- [STC SR00359BO](https://openairdocs.org/stc/SR00359BO): Installation of Parmetheus Plus LED PAR36 and PAR46 taxi and landing lights. Whelen Aerospace Technologies
- [STC SR02629SE](https://openairdocs.org/stc/SR02629SE): Installation of Model 266 Spray System. Simplex Manufacturing Company
- [STC SR02290AK](https://openairdocs.org/stc/SR02290AK): Manufacture tundra/snow boards, Install and maintain. Pollux Aviation Ltd
- [STC SR02592SE](https://openairdocs.org/stc/SR02592SE): nstallation of a Supplemental Lighting System manufactured and installed. Aviation Specialties Unlimited Inc
- [STC SR00805NY](https://openairdocs.org/stc/SR00805NY): Manufacture and installation of bearpaws. Northeast Engr & Dev Ltd
- [STC SR04040NY](https://openairdocs.org/stc/SR04040NY): Installation of Wire Strike Protection System. Magellan Aerospace
- [STC SR00387BO](https://openairdocs.org/stc/SR00387BO): Installation of Avidyne 700-00182-XXX IFD5XX and 700-00179-XXX IFD4XX Series Integrated Flight Displays (IFD). Avidyne Corporation
- [STC SR02660LA](https://openairdocs.org/stc/SR02660LA): Installation of Nose Utility Mount. Airfilm Camera Systems
- [STC SR03917NY](https://openairdocs.org/stc/SR03917NY): Installation of the Heli-Utility-Basket. Dart Aerospace Limited
- [STC SR02487AK](https://openairdocs.org/stc/SR02487AK): Installation of L-3 Communications Avionics Systems ESI-500 Standby Instrument System. ADS-B Technologies, LLC
- [STC SR00101RD](https://openairdocs.org/stc/SR00101RD): Installation of an agricultural spray system which includes an external spray boom, external tank, motor driven pump, plumbing, compressor and pneumatic components, and cockpit controls. AirLift Technologies, Ltd
- [STC SR04158CH](https://openairdocs.org/stc/SR04158CH): Installation of a fuel flow adapter. Shadin Avionics
- [STC SR00840DE](https://openairdocs.org/stc/SR00840DE): Installation of the Rosen Sunvisor System into the Robinson R22. R44 and R66. Rosen Sunvisor Systems 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 SR03515NY](https://openairdocs.org/stc/SR03515NY): Installation of the D066-1004-011 Primary Cargo Hook. Dart Aerospace Limited
- [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 SR03460NY](https://openairdocs.org/stc/SR03460NY): Installation of Interior Protector Kits. Dart Aerospace Limited
- [STC SR02484LA](https://openairdocs.org/stc/SR02484LA): Installation of Apical Industries, Inc. Emergency Float Kits. Apical Industries, Inc. dba Dart Aerospace
- [STC SR03370NY](https://openairdocs.org/stc/SR03370NY): Installation of Bearpaws. Dart Aerospace Limited
- [STC SR03369NY](https://openairdocs.org/stc/SR03369NY): Installation of Cargo Mirror. Dart Aerospace Limited
- [STC SR00318BO](https://openairdocs.org/stc/SR00318BO): Installation of external Cargo Hookup Mirror. Firefly Inc

## PMA parts (OpenAirDocs) (87, 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.

- [N200SGL1011](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172372892920261023152354.0001): Fan Cover. NAASCO Northeast Corp · PMA PQ0961NE · Replaces SkurkaAerospaceInc.(Aircraft… · Jul 16, 2026
- [LHA-44-005](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147516958220260514172733.0001): Aft Attachment Bracket. Longhorn Aviation Services, LLC. · PMA PQ00042CB · Modification part · Mar 17, 2026
- [LHA-44-007](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137520108420260514172733.0001): Clamp Spacer. Longhorn Aviation Services, LLC. · PMA PQ00042CB · Modification part · Mar 17, 2026
- [LHA-44-002](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125337596820260514172732.0001): Forward Clamp, RH. Longhorn Aviation Services, LLC. · PMA PQ00042CB · Modification part · Mar 17, 2026
- [LHA-44-003](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114061500920260514172732.0001): Step. Longhorn Aviation Services, LLC. · PMA PQ00042CB · Modification part · Mar 17, 2026
- [LHA-44-001](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106443746320260514172732.0001): Forward Clamp, LH. Longhorn Aviation Services, LLC. · PMA PQ00042CB · Modification part · Mar 17, 2026
- [LHA-44-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID109028373720241017194519.0001): R44/R66 Skid Tube Step. RSG Products Inc · PMA PQ03883SW · Replaces LHA-44-1 · Oct 17, 2024
- [98020066-5007](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120867041520240716160447.0001): Robinson R66 NVG Modification Kit. REB Technologies Inc · PMA PQ1018SW · Modification part · Jul 3, 2024
- [TA3078-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID159524737820240531131437.0001): Heli-Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Apr 19, 2024
- [TA3078-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID113971048720240531131437.0001): Heli-Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Apr 19, 2024
- [TAU03323](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID169171093220240221143036.0001): AV/Cabin Heat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Dec 14, 2023
- [N1834-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137997912820230816180056.0001): Carbon Brush. NAASCO Northeast Corp · PMA PQ0961NE · Replaces SkurkaAerospaceInc.(Aircraft… · Aug 15, 2023
- [98020066-5006](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123674102820230424165405.0001): Robinson R66 NVG Modification Kit. REB Technologies Inc · PMA PQ1018SW · Modification part · Apr 19, 2023
- [ETR 25-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184923079220230302140920.0001): Starter- Generator Mod Kit. NAASCO Northeast Corp · PMA PQ0961NE · Replaces Skurka Aerospace Inc. (Aircraft Parts… · Feb 9, 2023
- [ETR 25-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184329992620230302140921.0001): Starter- Generator Mod Kit. NAASCO Northeast Corp · PMA PQ0961NE · Replaces Skurka Aerospace Inc. (Aircraft Parts… · Feb 9, 2023
- [ETR 25-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103025326520230302140918.0001): Starter- Generator Mod Kit. NAASCO Northeast Corp · PMA PQ0961NE · Replaces Skurka Aerospace Inc. (Aircraft Parts… · Feb 9, 2023
- [WM150SG-K1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192857159020220816120606.0001): Overhaul Hardware Kit 150SG, 160SG Series Starter Generators. Wesco Manufacturing, Inc. · PMA PQ00011EB · Replaces Aircraft Parts Corporation… · Aug 9, 2022
- [200-381-00200-381-01200-381-10200-381-11](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173951126320220811112152.0001): Cargo Hook Suspension Kit w/ Load Weigh. Onboard Systems International · PMA PQ0055NM · Modification part · Jul 28, 2022
- [200-417-00](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173945941520220811112155.0001): Co-Pilot Switch Kit. Onboard Systems International · PMA PQ0055NM · Modification part · Jul 28, 2022
- [200-382-00200-382-01](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151779430320220811112153.0001): Pin Load Weigh System. Onboard Systems International · PMA PQ0055NM · Modification part · Jul 28, 2022
- [200-380-00200-380-10](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127870192320220811112151.0001): Cargo Hook Suspension Kit. Onboard Systems International · PMA PQ0055NM · Modification part · Jul 28, 2022
- [200-392-00](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100582806820220811112154.0001): Remote Hook Electrical Release Kit. Onboard Systems International · PMA PQ0055NM · Modification part · Jul 28, 2022
- [01-0790906-00](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137827362920220610124318.0001): LED Landing Light. Whelen Aerospace Technologies · PMA PQ1372CE · Modification part · Jun 6, 2022
- [M2001-20](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID260840831520220207165606.0001): Brush, Electrical Contact. Miraj Corporation · PMA PQ0870NE · Replaces 150SG1009-20XL2 · Dec 1, 2021
- [LHA-44-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID413864469620210622143537.0001): R44/R66   Skid Tube Step. Aerocraft, Inc. · PMA PQ5299NM · Replaces LHA-44-1 · Dec 17, 2020
- [200-381-01](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID307202557202106211541370.0001): Cargo Hook Suspension Kit w/ Load Weigh. Onboard Systems International · PMA PQ0055NM · Modification part · Dec 1, 2020
- [200-381-11](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID213731564420210621154137.0001): Cargo Hook Suspension Kit w/ Load Weigh. Onboard Systems International · PMA PQ0055NM · Modification part · Dec 1, 2020
- [200-382-01](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID154380812720210621154138.0001): Pin Load Weigh System. Onboard Systems International · PMA PQ0055NM · Modification part · Dec 1, 2020
- [R44B-101](https://drs.faa.gov/browse/excelExternalWindow/FCC078E663F5D6EE862585DF00336B09.0001): Clamp Lower Bushing. Brunner Machine Works, LLC · PMA PQ04418CE · Replaces R44B-101 · Sep 7, 2020
- [R66B-904](https://drs.faa.gov/browse/excelExternalWindow/FA30BAF063F9E268862585DF00336B75.0001): Ratchet Strap Anchoring Base. Brunner Machine Works, LLC · PMA PQ04418CE · Replaces R66B-904 · Sep 7, 2020
- [R44B-102](https://drs.faa.gov/browse/excelExternalWindow/CB0AAAC5DD111A2A862585DF00336B39.0001): Clamp Upper Bushing. Brunner Machine Works, LLC · PMA PQ04418CE · Replaces R44B-102 · Sep 7, 2020
- [R66B-401](https://drs.faa.gov/browse/excelExternalWindow/ACE529A5F66E28FF862585DF00336ACE.0001): Aft Bracket. Brunner Machine Works, LLC · PMA PQ04418CE · Replaces R66B-401 · Sep 7, 2020
- [R66B-905](https://drs.faa.gov/browse/excelExternalWindow/5AF7D3533D48C80D862585DF00336BB0.0001): Ratchet Strap Side Cover. Brunner Machine Works, LLC · PMA PQ04418CE · Replaces R66B-905 · Sep 7, 2020
- [R66B-906](https://drs.faa.gov/browse/excelExternalWindow/4B392B036861E2B6862585DF00336BEC.0001): Ratchet Strap Anchoring Pivot Base. Brunner Machine Works, LLC · PMA PQ04418CE · Replaces R66B-906 · Sep 7, 2020
- [MDL-R66004-3](https://drs.faa.gov/browse/excelExternalWindow/32E19F6DF92E283A8625857000521092.0001): Supplemental Lighting System. Aviation Specialties Unlimited Inc · PMA PQ2538NM · Modification part · Oct 7, 2019
- [R66M-500-2](https://drs.faa.gov/browse/excelExternalWindow/C151515E4945E53986258567004F7553.0001): Hanger Bushing. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-500-2 · Oct 1, 2019
- [R66M-100-10](https://drs.faa.gov/browse/excelExternalWindow/B62E820D3A3047E586258567004F7334.0001): Gusset. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-10 · Oct 1, 2019
- [R66M-300](https://drs.faa.gov/browse/excelExternalWindow/AEEC56B83FA2DD7586258567004F7471.0001): Side Clamp Upper and Lower. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-300 · Oct 1, 2019
- [R66M-100-6](https://drs.faa.gov/browse/excelExternalWindow/A5071B68765EBB1686258567004F7264.0001): Gusset. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-6 · Oct 1, 2019
- [R66M-100-3](https://drs.faa.gov/browse/excelExternalWindow/A4AFB125A38DB7C886258567004F71AA.0001): Aft Bracket. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-3 · Oct 1, 2019
- [R66M-100-11](https://drs.faa.gov/browse/excelExternalWindow/853A81804CE6A0FB86258567004F7372.0001): Front Weldment Cover. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-11 · Oct 1, 2019
- [R66M-100-12](https://drs.faa.gov/browse/excelExternalWindow/83C56DED766E7F0186258567004F73BB.0001): Steel Coupler Female Side. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-12 · Oct 1, 2019
- [R66M-100-B](https://drs.faa.gov/browse/excelExternalWindow/776AFEB40D1A4B4D86258567004F712D.0001): Tube Weldment. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-B · Oct 1, 2019
- [R66M-100-2](https://drs.faa.gov/browse/excelExternalWindow/75A33C8693ACDBB286258567004F7163.0001): Forward Bracket. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-2 · Oct 1, 2019
- [R66M-400](https://drs.faa.gov/browse/excelExternalWindow/6F78D4EF44AE4D9386258567004F74BA.0001): Aft Clamp Upper and Lower. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-400 · Oct 1, 2019
- [R66M-900-2](https://drs.faa.gov/browse/excelExternalWindow/6EC9FB51416F8C4086258567004F76D8.0001): Washer. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-900-2 · Oct 1, 2019
- [R66M-100-9](https://drs.faa.gov/browse/excelExternalWindow/685DA6A6694A85BE86258567004F72F2.0001): Gusset. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-9 · Oct 1, 2019
- [R66M-100-5](https://drs.faa.gov/browse/excelExternalWindow/661BA82904DA5F4886258567004F7222.0001): Washer. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-5 · Oct 1, 2019
- [R66M-100-4](https://drs.faa.gov/browse/excelExternalWindow/5F5A8BA0ACA19DC786258567004F71EA.0001): Bushing. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-4 · Oct 1, 2019
- [R66M-100-13](https://drs.faa.gov/browse/excelExternalWindow/5F3B03B130FF6B8886258567004F73F4.0001): Steel Coupler Male Side. Brunner Machine Works, LLC. · PMA PQ04418CE · Replaces R66M-100-13 · Oct 1, 2019

All of them: https://openairdocs.org/model/robinson-helicopter-r66/pma.md

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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.