Safety record in brief:1 NTSB accident (substantial damage, Oct 2023)32 ADs may apply
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A malfunction of the helicopter’s Engine Monitoring Unit (EMU)/Governor Controller for undetermined reasons. Contributing to the accident was the flight instructor’s failure to turn off the EMU/Governor Controller per the emergency checklist when the malfunction first occurred.
From NTSB records; matched by serial number.Read NTSB report (search CAROL for CEN24LA027)
These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.
| AD | Subject | Effective | Applies to |
|---|---|---|---|
| 2026-17-10 | Reciprocating Engine Cylinder Section | Sep 14, 2026 | Engine (O-540-F1B5)Serial numbers per Table 2 or Table 3 of Lycoming Mandatory Service Bulletin No. 667A, dated March 12, 2026. Only with: Installed piston pin P/N LW-13445 with an OEM FAA Form 8130-3 production dated between January 7, 2021 and December 15, 2025, or where the production date cannot be determined or the form is unavailable. |
| 2025-11-07 | Engine/ Transmission coupling | Jul 11, 2025 | Airframe (R44) |
| 2024-23-01 | Robinson Helicopter Company | Jan 7, 2025 | Airframe (R44)Certain serial numbers: R44 …–2480; R44 30001–30022; R44 II …–14089. Only with: Riveted belt tension clutch actuator brackets P/N A185-1, A185-2, or A185-5 installed (brackets attached to fan scroll housing with screws are not applicable). |
| 2024-20-07 | Various Helicopters | Dec 5, 2024 | Airframe (R44)Only with: Only helicopters modified by the applicable STC (SR00831LA, SR00780LA, SR01687LA, SR00856LA, SR01855LA, SR02244LA, SR01779LA, SR01459LA, SR01535LA, SR00932LA, SR02049LA, SR02484LA, or SR01902LA). |
| 2024-20-03 | Robinson Helicopter Company Helicopters | Nov 29, 2024 | Airframe (R44)Only with: Governor controller P/N D270-1, Revision A through E inclusive, installed. |
| AD | Subject | Effective | Applies to |
|---|---|---|---|
| 2022-12-08 | Robinson Helicopter Company Helicopters | Jun 29, 2022 | Airframe (R44)Certain serial numbers: R22 BETA 4825–4857; R22 BETA 4860; R22 BETA 4861; R44 2625–2669; R44 30061; R44 30071–30080; … |
| 2021-19-08 | Robinson Helicopter Company Helicopters | Sep 22, 2021 | Airframe (R44)Only with: Tail rotor blade P/N C029-3 with S/N 9410 through 9909 inclusive installed. |
| 2020-08-10 | Robinson Helicopter Company Helicopters | May 22, 2020 | Airframe (R44)Only with: Tail rotor blade P/N C029-1 or C029-2 installed. |
| 2020-05-11 | Robinson Helicopter Company Helicopters | Apr 16, 2020 | Airframe (R44)Only with: Agricultural spray system (Simplex Model 244) installed by STC SR00286BO with spray system serial numbers 0045 through 0178 inclusive. |
| 2016-26-04 | Robinson Helicopter Company Helicopters | Feb 8, 2017 | Airframe (R44)Only with: R44/R44 II with main rotor blade P/N C016-7 Revision AA through AE installed; R66 with main rotor blade P/N F016-2 Revision A through E installed. |
| 2013-05-15 | Robinson Helicopter Company Helicopters | Apr 30, 2013 | Airframe (R44)Only with: Emergency floats equipped with inflation valve assembly P/N D757-1 not engraved with "D758-4" or modified with modification B900-8, and containing housing assembly P/N D758-1 Revision C or prior. |
| 2011-12-10 | Robinson Helicopter Company Model (Robinson) R22, R22 Alpha, R22 Beta, R22 Mariner, R44… | Jul 5, 2011 | Airframe (R44)Only with: R22 models with main rotor blade P/N A016-4 installed; R44 models with main rotor blade P/N C016-2 or C016-5 installed. |
| 2010-24-03 | Robinson Helicopter Company (Robinson) Model R22, R22 Alpha, R22 Beta, and R22 Mariner… | Dec 29, 2010 | Airframe (R44)Certain serial numbers: R22 0002–3325; R22 Alpha 0002–3325; R22 Beta 0002–3325; R22 Mariner 0002–3325; R44 0001–1200; R44 II 0001–1200. Only with: Helicopters with more than 2,200 hours total time-in-service. |
| 2007-11-01 | Robinson Helicopter Company Model R44 and R44 II Helicopters | Jun 27, 2007 | Airframe (R44)Certain serial numbers: R44 …–1576; R44 II …–11107. Only with: Seat belt buckle assembly P/N C628-4, revision M or prior, installed. |
| 2006-10-21 | Engine Components Incorporated (ECi) Reciprocating Engine Connecting Rods | Jun 22, 2006 | Engine (O-540-F1B5)Only with: ECi connecting rods P/N AEL11750 (forging P/N AEL11488) installed, rod serial numbers 54/6 and below, produced between January 2002 and January 2004. |
| 2005-19-11 | Lycoming Engines (Formerly Textron Lycoming) AEIO-360, IO-360, O-360, LIO-360, LO-360… | Oct 21, 2005 | Engine (O-540-F1B5)Only with: Engines rated at 300 HP or lower, manufactured new, rebuilt, or overhauled after March 1, 1999, or that had a crankshaft installed after March 1, 1999. |
| 2004-05-24 | Lycoming Engines (Formerly Textron Lycoming) AEIO-540, IO-540, LTIO-540, O-540, and… | Mar 30, 2004 | Engine (O-540-F1B5)Only with: Engines with crankshaft gear retaining bolts P/N STD-2209 installed; excludes O-540-F series engines subject to AD 99-03-05 with bolt not since replaced, engines with bolt installed at original assembly or replaced by Lycoming per SB 554 after November 10, 1998, engines with bolt from replacement kits 05K19987, 05K23325, 05K23326, 05K23327, 05K23335 or 05K23336, and engines with single-drive dual magnetos. |
| 2003-04-05 | Robinson Helicopter Company Model R44 Helicopters | Mar 26, 2003 | Airframe (R44)Certain serial numbers: R44 …–1142; R44 1144–1164; R44 1166–1182; R44 1184–1188; R44 1190–1191; R44 1193–1195; …. Only with: Pitch control assembly P/N C031-1, Revision G or prior, installed; S/N up to and including 1208 except 1143, 1165, 1183, 1189, 1192, 1196, 1197, 1198, 1200, 1203, and 1204. |
| 2001-20-18 | Robinson Helicopter Company Model R44 Helicopters | Oct 15, 2001 | Airframe (R44)Only with: Horizontal stabilizer assembly P/N C044-1, stabilizer S/N 0009 through 0224 installed, except stabilizer S/N 0018, 0090, 0094, 0111, 0129, 0144, 0161, 0178, 0201, and 0223. |
| 2000-08-04 | Robinson Helicopter Company Model R44 Helicopters | May 4, 2000 | Airframe (R44)Certain serial numbers: R44 0001–0541; R44 0543; R44 0550; R44 0556; R44 0565. Only with: Sprag clutch P/N C188-3, S/N 0003 through 0505 inclusive, installed. |
| 2000-07-03 | Robinson Helicopter Company Model R44 Helicopters | Apr 6, 2000 | Airframe (R44)Certain serial numbers: R44 0002–0462 |
| 99-23-01 | Robinson Helicopter Company (Robinson) Model R44 Helicopters | Dec 8, 1999 | Airframe (R44)Certain serial numbers: R44 0001–0159. Only with: Excludes S/N 0143, 0150, and 0156; applies with pilot's cyclic control grip assembly P/N A756-6, Revision N or prior revision, installed. |
| 99-17-17 | Robinson Helicopter Company Model R44 Helicopters | Oct 7, 1999 | Airframe (R44) |
| 99-13-11 | Robinson Helicopter Company (Robinson) Model R44 Helicopters | Jul 29, 1999 | Airframe (R44)Certain serial numbers: R44 0002–0529. Only with: Excludes serial numbers 0440, 0485, 0512, 0515, 0519, 0526, 0527, and 0528. |
| 99-07-18 | Robinson Helicopter Company Model R44 Helicopters | Apr 28, 1999 | Airframe (R44)Certain serial numbers: R44 0001–0541; R44 0543; R44 0556; R44 0565. Only with: With sprag clutch P/N C188-3, S/N 0003 through 0452, installed. |
| 99-03-05 | Textron Lycoming Model O-540-F1B5 Reciprocating Engines | Feb 18, 1999 | Engine (O-540-F1B5)Certain serial numbers: L-24545-40A; L-24628-40A; L-24766-40A; L-24772-40A; L-25050-40A; L-25052-40A; … |
| 98-22-16 | Robinson Helicopter Company (RHC) Model R44 Helicopters | Nov 10, 1998 | Airframe (R44)Certain serial numbers: R44 0002–0486. Only with: Main rotor blades P/N C016-1 installed. |
| 98-04-12 | Robinson Helicopter Company Model R44 Helicopters | Apr 27, 1998 | Airframe (R44)Certain serial numbers: R44 0002–0420; R44 0425; R44 0426; R44 0427. Only with: With a C056-1 Rev. A through G spring assembly installed. |
| 98-05-10 | Robinson Helicopter Company Model R44 Helicopters | Mar 18, 1998 | Airframe (R44)Certain serial numbers: R44 0001–0330 |
| 97-16-02 | Robinson Helicopter Company Model R44 Helicopters | Aug 18, 1997 | Airframe (R44)Certain serial numbers: R44 0001–0332 |
| 95-09-07 | Robinson Helicopter Company Model R44 Helicopters | May 24, 1995 | Airframe (R44)Certain serial numbers: R44 0001–0150 |
| 95-04-13 | Robinson Helicopter Company Model R44 Helicopters | Mar 17, 1995 | Airframe (R44) |
AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.
No Service Difficulty Reports found for this airframe since 1995.