Main Gearbox
0 failure reports named the main gearbox in the last ten years, 1 since 1996. 36 FAA approvals let 3 companies make a replacement main gearbox, Sterling Helicopter holding the most (27).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1996 | 1 |
Approved replacement parts 36 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a main gearbox and sell it as an approved part for the models named. These are the companies holding such approvals for a main gearbox:
Sterling Helicopter 27Hamilton Sundstrand Corporation 7Parker Hannifin CORP, Nichols Airborne Division 2
For these models most: Airbus Helicopters EC-135 now H135 (8), Leonardo Spa AW109 (6), Agusta Spa A109 (6), Bell 407 (4), Agustawestland Philadelphia Co AW119 (4), Bell 206 JetRanger and LongRanger (3), Bell 505 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Sterling Helicopter | MAIN GEARBOX INPUT 1 INTL RMHA-000066-310 | Modification Part | Leonardo S.p.A. A109, A109A, A109A II | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 1 ACCEL INTL RMHA-000035-320 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT ACCEL RMHA-000059-90 | Modification Part | Bell Textron Canada Limited 505 | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX AFT ACCEL RMHA-000029-180 | Modification Part | Bell Textron Canada Limited 407 | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX CASE ACCEL RMHA-000059-100 | Modification Part | Bell Textron Canada Limited 505 | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX LATERAL INTL RMHA-000066-300 | Modification Part | Leonardo S.p.A. A109, A109A, A109A II | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX FWD ACCEL INTL RMHA-000029-220 | Modification Part | Bell Textron Canada Limited 407 | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 1 ACCEL RMHA-000066-110 | Modification Part | Leonardo S.p.A. A109, A109A, A109A II | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX LATERAL ACCEL RMHA-000084-110 | Modification Part | Leonardo S.p.A. AW119, AW119 MKII | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX CASE, INTL RMHA-000032-220 | Modification Part | Bell Textron Canada Limited 206, 206A, 206A-1 (OH-58A) | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX CASE ACCEL RMHA-000032-100 | Modification Part | Bell Textron Canada Limited 206, 206A, 206A-1 (OH-58A) | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 2 ACCEL INTL RMHA-000035-330 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX FORWARD, INTL RMHA-000032-210 | Modification Part | Bell Textron Canada Limited 206, 206A, 206A-1 (OH-58A) | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX LATERAL ACCEL INTL RMHA-000084-210 | Modification Part | Leonardo S.p.A. AW119, AW119 MKII | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT ACCEL INTL RMHA-000084-200 | Modification Part | Leonardo S.p.A. AW119, AW119 MKII | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 2 INTL RMHA-000066-320 | Modification Part | Leonardo S.p.A. A109, A109A, A109A II | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX AFT ACCEL INTL RMHA-000029-230 | Modification Part | Bell Textron Canada Limited 407 | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX AFT ACCEL RMHA-000035-100 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX FORWARD ACCEL RMHA-000035-110 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 1 ACCEL RMHA-000035-120 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 2 ACCEL RMHA-000035-130 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX LATERAL ACCEL RMHA-000066-100 | Modification Part | Leonardo S.p.A. A109, A109A, A109A II | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT 2 ACCEL RMHA-000066-120 | Modification Part | Leonardo S.p.A. A109, A109A, A109A II | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX INPUT ACCEL RMHA-000084-100 | Modification Part | Leonardo S.p.A. AW119, AW119 MKII | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX AFT ACCEL INTL RMHA-000035-300 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX FORWARD ACCEL RMHA-000029-170 | Modification Part | Bell Textron Canada Limited 407 | 2025-12-22 | current |
| Sterling Helicopter | MAIN GEARBOX FORWARD ACCEL INTL RMHA-000035-310 | Modification Part | Airbus Helicopters... EC135P1, EC135P2, EC135P2+ | 2025-12-22 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Outline 1709278G | 5702983 | Engine Alliance LLC Engine Alliance Series Engine(s)... | 2020-07-22 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Outling 1709278F | 5702955 | Engine Alliance GP7272, GP7270, GP7277 | 2018-04-05 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Assy 1709278E | 5702929 | Engine Alliance llc. GP7270, GP7272, GP7277 | 2016-05-08 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Outline 1709278D | 1709278 | Engine Alliance GP7270, GP7277 | 2011-04-04 | current |
| Parker Hannifin CORP, Nichols Airborne Division | Main Gearbox 2 Lubrication Pump Assembly Reference: Model 4466-5 31-75101-4057-5 | EA6300V119-007 | Agusta EH-101 Civil Utility | 2007-03-07 | current |
| Parker Hannifin CORP, Nichols Airborne Division | Main Gearbox 1 Lubrication Pump Assembly Reference: Model 4467-1 31-75101-4039-5 | EA6300V118-001 | Agusta EH-101 Civil Utility | 2007-03-07 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Deoiler-Breather 771978A | Pratt & Whitney 5401888 | Pratt & Whitney PW6122-1D, PW6124 | 2002-05-19 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Assembly 770366H | Pratt & Whitney 5404847 | Pratt & Whitney PW6122-1D, PW6124 | 2002-05-19 | current |
| Hamilton Sundstrand Corporation | Main Gearbox Assembly 770366C | Pratt & Whitney 5403050 | Pratt & Whitney PW6122-1D, PW6124 | 2002-05-19 | current |
Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.