| 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. |
| 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. |
| 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) |