Governor
139 failure reports named the governor in the last ten years, 924 since 1995, most often on the Boeing 757; the condition most often found was "malfunctioned". 394 FAA approvals let 4 companies make a replacement governor, Ontic Engineering & Manufacturing INC holding the most (318).
Reports by year
Reports by year, as a table
| reports | |
|---|---|
| 1995 | 41 |
| 1996 | 45 |
| 1997 | 46 |
| 1998 | 52 |
| 1999 | 38 |
| 2000 | 39 |
| 2001 | 59 |
| 2002 | 49 |
| 2003 | 73 |
| 2004 | 43 |
| 2005 | 40 |
| 2006 | 34 |
| 2007 | 23 |
| 2008 | 21 |
| 2009 | 16 |
| 2010 | 19 |
| 2011 | 23 |
| 2012 | 37 |
| 2013 | 35 |
| 2014 | 27 |
| 2015 | 25 |
| 2016 | 21 |
| 2017 | 16 |
| 2018 | 10 |
| 2019 | 28 |
| 2020 | 11 |
| 2021 | 16 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 8 |
| 2025 | 5 |
| 2026 | 8 |
Which system the reports file it under last ten years
Reports by system, as a table
| reports | |
|---|---|
| Propeller | 69 |
| Engine | 66 |
| Airframe structure | 2 |
| Flight controls | 1 |
| Rotorcraft systems | 1 |
Models most often reporting it last ten years
How it failed the condition found, last ten years
malfunctioned27inoperative23faulty20failed11defective10faulted9leaking5unreliable4binding2damaged2
Conditions found, as a table
| reports | |
|---|---|
| malfunctioned | 27 |
| inoperative | 23 |
| faulty | 20 |
| failed | 11 |
| defective | 10 |
| faulted | 9 |
| leaking | 5 |
| unreliable | 4 |
| binding | 2 |
| damaged | 2 |
Engines most often reporting it
Approved replacement parts 394 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a governor and sell it as an approved part for the models named. These are the companies holding such approvals for a governor:
Ontic Engineering & Manufacturing INC 318Woodward INC 36Honeywell International INC 25Honeywell International INC. 15
For these models most: Piper PA-31 Navajo and Chieftain (28), Piper PA-23 Apache and Aztec (11), Cessna 310 (11), Britten-Norman BN-2 (11), Cessna 210 Centurion (10), Cessna 320 (9), Beechcraft 95 Travel Air and Baron 55 (9), Aero Commander 680 (9), Pilatus Britten-Norman Ltd. BN-2 (8), Cessna T337 (8), Cessna P337 (8), Cessna 414 Chancellor (8).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Honeywell International INC. | Governor, Free Turbine 2524999-5 | 3045144-01 | Pratt & Whitney PT6T-3, PT6T-6, PT6T-3B | 2023-04-14 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549173-2 | 23086786 | Rolls-Royce Corporation 250-C30G | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549172-2 | 23086751 | Rolls-Royce Corporation 250-C30, 250-C30P, 250-C30S | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549175-2 | 23086772 | Rolls-Royce Corporation 250-C20 | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549170-2 | 23086749 | Rolls-Royce Corporation 250-C20B, 250-C20F, 250-C20S | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549169-2 | 23086771 | Rolls-Royce Corporation 250-C18 | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549176-2 | 23086750 | Rolls-Royce Corporation 250-C20C (T63-A-720) | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549171-2 | 23086774 | Rolls-Royce Corporation 250-C28B, 250-C28C | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549178-2 | 23086773 | Rolls-Royce Corporation 250-C20B, 250-C20F, 250-C20S | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549174-2 | 23086775 | Rolls-Royce Corporation 250-C30M | 2023-03-10 | current |
| Honeywell International INC. | Governor Assembly, Power Turbine 2549177-2 | 23086752 | Rolls-Royce Corporation 250-C30G/2 | 2023-03-10 | current |
| Honeywell International INC. | Governor, Free Turbine 3244885-2 | 3054401-01 | Pratt & Whitney Canada Corp. PT6T-3D, PT6T-3DE, PT6T-3DF | 2023-01-20 | current |
| Honeywell International INC. | Governor, Power Turbine 4138007-3 | 3050294-03 | Pratt & Whitney Canada PT6B-37A | 2023-01-12 | current |
| Honeywell International INC. | Governor, Power Turbine 442527-1 | 3073542-01 | Pratt & Whitney Canada PT6B-37A | 2023-01-12 | current |
| Honeywell International INC. | Governor, Power Turb, Instl & Assy 2524912 | 2524912 | Rolls-Royce Corporation 250-C20C (T63-A-720) | 2022-11-29 | current |
| Woodward INC | Governor Assy 623-271 | Piper Aircraft, Inc. 623-271 | Piper Aircraft Inc. PA-46-500TP, PA-46-600TP | 2017-10-02 | current |
| Woodward INC | Governor - Propeller 210949-01 | 3079148-01 | Pratt & Whitney Canada, Corp. PT6A-67B, PT6A-67P | 2015-10-26 | current |
| Woodward INC | Governor - Assy, Propeller Interface Unit 8210-526 | 3123310-08 | Pratt & Whitney Canada, Corp. PT6A-68 | 2014-01-22 | current |
| Woodward INC | Governor - Propeller 8210-006-01 | 3074157-01 | Pratt & Whitney Canada, Corp. PT6A-38, PT6A-41, PT6A-42 | 2014-01-02 | current |
| Woodward INC | Governor - Propeller 8210-027-01 | 3074160-01 | Pratt & Whitney Canada, Corp. PT6A-41, PT6A-61 | 2014-01-02 | current |
| Ontic Engineering & Manufacturing INC | Governor Assembly, Fuel Control 977253-17 | 977253-17 | Honeywell 700-4B (DC-10, MD-10), 700-5 (A300) | 2013-11-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assembly, Fuel Control 977253-18 | 977253-18 | Honeywell 700-4B (DC-10, MD-10), 700-5 (A300) | 2013-11-14 | current |
| Woodward INC | Governor Assy - Turboprop Constant Speed 8210-002-01 | Pratt & Whitney Canada, corp. 3074154-01 | Pratt & Whitney Canada, Corp. PT6A-140 | 2013-02-18 | current |
| Woodward INC | Governor, Prop-Constant Speed 8210-602 | Honeywell International Inc. P/N 895490-14 | Honeywell International Inc. TPE331-5-252M, TPE331-5-252K, TPE331-5-254K | 2011-03-07 | current |
| Woodward INC | Governor, Prop-Constant Speed 8210-601 | Honeywell International Inc. P/N 895490-13 | Honeywell International Inc. TPE331-5-251C, TPE331-5-251K, TPE331-5-255K | 2011-03-07 | current |
| Woodward INC | Governor, Prop-Constant Speed 8210-600 | Honeywell International Inc. P/N 895490-12 | Honeywell International Inc. TPE331-5-252M, TPE331-5-252K, TPE331-5-254K | 2011-03-07 | current |
| Woodward INC | Governor, Prop-Constant Speed 8210-604 | Honeywell International Inc. P/N 895490-16 | Honeywell International Inc. TPE331-5-251C, TPE331-5-251K, TPE331-5-255K | 2011-03-07 | current |
| Woodward INC | Governor, Prop-Constant Speed 8210-603 | Honeywell International Inc. P/N 895490-15 | Honeywell International Inc. TPE331-5-252M, TPE331-5-252K, TPE331-5-254K | 2011-03-07 | current |
| Woodward INC | Governor, Prop-Constant Speed 8210-605 | Honeywell International Inc. P/N 895490-17 | Honeywell International Inc. TPE331-5-252M, TPE331-5-252K, TPE331-5-254K | 2011-03-07 | current |
| Woodward INC | Governor - Propeller Overspeed 210949 | Pratt and Whitney Canada 3037685 | Pratt and Whitney Canada Corp PT6A-67P | 2008-09-11 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549176-2 | 23086750 | Rolls-Royce 250-C20 (T63-A-720) | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549171-2 | 23086774 | Rolls-Royce 250-C28B, 250-C28C | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549173-2 | 23086786 | Rolls-Royce 250-C30G | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549169-2 | 23086771 | Rolls-Royce 250-C18 | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549178-2 | 23086773 | Rolls-Royce 250-C20B, 250-C20S, 250-C20F | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549172-2 | 23086751 | Rolls-Royce 250-C30, 250-C30P, 250-C30S | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549170-2 | 23086749 | Rolls-Royce 250-C20B, 250-C20S, 250-C20F | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549175-2 | 23086772 | Rolls-Royce 250-C20 | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549174-2 | 23086775 | Rolls-Royce 250-C30M | 2008-07-24 | current |
| Honeywell International INC | Governor Assembly, Power Turbine 2549177-2 | 23086752 | Rolls-Royce 250-C30G/2 | 2008-07-24 | current |
| Honeywell International INC | Governor - Power Turbine 442527-1 | 3073542-01 | Pratt & Whitney Canada PT6B-37A | 2008-04-22 | current |
| Honeywell International INC | Governor - Free Turbine 3244885-2 | 3054401-01 | Pratt & Whitney Canada PT6T-3D, PT6T-3DE, PT6T-3DF | 2008-04-22 | current |
| Honeywell International INC | Governor - Power Turbine 4138007-3 | 3050294-03 | Pratt & Whitney Canada PT6B-37A | 2008-04-22 | current |
| Honeywell International INC | Governor - Free Turbine 2524999-5 | 3045144-01 | Pratt & Whitney Canada PT6T-3, PT6T-6, PT6T-3B | 2008-04-22 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. A210921 | Woodward A210921 | Hoffmann GmbH Propeller Hub Model HO-V123K-V | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA A210710 | A210710 | Cessna 310R, T310P, T310Q | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA B210801 | B210801 | Raytheon 95-55, 95-A55, 95-B55 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Feathering 210473 | 210473 | Piper PA-23-235 PA-23-250, PA-E23-250 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA B210710 | B210710 | Raytheon D55, D55A, E55 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. A210529 | Woodward A210529 | McCauley Propeller Hub Models D2AF34C,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. G210681 | Woodward G210681 | Hartzell Propeller Hub Models BHC-C2YF-1( )F,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Type II A210800 | A210800 | Raytheon D55, D55A, E55 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA SP. Single Engine 210340 | 210340 | Cessna 180G, 180H, 180J | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210905 | 210905 | Cessna 175, 175A, 175B | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210446 | Woodward 210446 | Hartzell Propeller Hub Models HC-A2XF-2,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210715 | Woodward 210715 | Hartzell Propeller Hub Model HC-C2YK-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA SP. Single Engine B210345 | B210345 | Mooney Aircraft M20A, M20B, M20C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA A210452 | A210452 | Cessna 180, 180A, 180B | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. D210439 | Woodward D210439 | McCauley Propeller Hub Models 2AF34C, D2AF34C, D3AF32C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA SP. Single Engine J210345 | J210345 | Rockwell Commander 114 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA A210490 | A210490 | Raytheon A23-24, A24, A24R | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210419 | Woodward 210419 | Raytheon Propeller Hub Model 278 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210903 | Woodward 210903 | McCauley Propeller Hub Models B3D32C419, B3D34C405 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210514 | 210514 | Gulfstream 560F, 680F, 680FL | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA L210909 | L210909 | Piper PA-31-325, PA-31-350 Left Engine... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA L210761 | L210761 | Cessna TR182 (with C290D3/T21 governor) | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. A210305 | Woodward A210305 | Hartzell Propeller Hub Model... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA Feathering 210484 | 210484 | Bellanca 17-30, A18CE) Cessna (A185E, A185F | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210731 | 210731 | Rockwell Commander 500S, 500U Modified - RPM STC SA2478SW | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA C210680 | C210680 | Cessna 206, P206, P206A thru E | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210702 | 210702 | Aerostar Aircraft 600, 601) Piper (PA-23-250 With... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210240 | Woodward 210240 | Hartzell Propeller Hub Model HC-92ZK-2, HC-92WK-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA A210680 | A210680 | Cessna 180 thru 180H, 180J, 182 thru 182N | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA SP. Single Engine 210937 | 210937 | Cessna T207A, T207, P210N | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210403 | Woodward C210403 | Hartzell Propeller Hub Models HC-12X, HC-82X, HC-83X | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210529 | 210529 | Cessna 336, 337B, 337C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210728 | 210728 | Raytheon D50, D50A, D50B | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210609 | Woodward 210609 | Hartzell Propeller Hub Model HC-C2YK-1 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA M210761 | M210761 | Bellanca 17-31, 17-31TC With Lycoming IO-540... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210403 | Woodward 210403 | Hartzell Propeller Hub Model HC-A2XF-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Feathering B210409 | B210409 | Gulfstream 560F, 680F, 680FL | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. F210444 | Woodward F210444 | Hartzell Propeller Hub Model HC-C2YK-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA H210761 | H210761 | Mooney Aircraft M20M | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA B210760 | B210760 | Cessna M-4-210, M-4-210C, M-4-210S | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. A210375 | Woodward A210375 | Hartzell Propeller Hub Model HC-82 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Type II H210800 | H210800 | Piper PA31, PA31-325 Modified Colemill STC... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. F210992 | Woodward F210992 | Hartzell Propeller Hub Model... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA B210761 | B210761 | Maule M-5-235C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA R210707 | R210707 | Piper PA-31-350 Modified - Colemill STC SA1151SO | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. B210689 | Woodward B210689 | Hoffmann GmbH Propeller Hub Model HO-V123K-F | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210516 | 210516 | Gulfstream 560F, 680F, 680FL | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210439 | Woodward C210439 | McCauley Propeller Hub Models 3AF32C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210453 | Woodward 210453 | Hartzell Propeller Hub Model... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210711 | 210711 | Aerostar Aircraft 600, 601 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA A210595 | A210595 | Cessna 310G, H, I | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA F210841 | F210841 | Britten Norman BN-2, BN2A, BN-2A-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA L210679 | L210679 | Piper PA-31-350, PA-31-325 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA R210721 | R210721 | Piper PA-31-325, PA-31-350 RH Engine | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210703 | 210703 | Cessna 421, 421A, 421B) Rockwell Commander (685 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA SP. Single Engine 210512 | 210512 | Aero Commander 112) Rockwell Commander (111, 112B | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210732 | 210732 | Rockwell Commander 500A Modified - Colemill STC SA340SO | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210932 | Woodward 210932 | Hartzell Propeller Hub Model HC-E3YR-1RLF | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210761 | Woodward C210761 | Hartzell Propeller Hub Models HC-C2YK-1BF,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210413 | Woodward 210413 | Hartzell Propeller Hub Models HC-82X,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA A210669 | A210669 | Britten Norman BN-2, BN-2A, BN-2A-6 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. H210681 | Woodward H210681 | Hartzell Propeller Hub Model... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA B210419 | B210419 | Cessna A185E, A185F, A188 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210408 | 210408 | Twin Commander 560E | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA A210656 | A210656 | Cessna T310P, T310Q, 340 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Type II B210800 | B210800 | Raytheon D55, D55A, E55 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA L210924 | L210924 | Partenavia P68C Left Engine | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210235 | Woodward 210235 | Raytheon Propeller Hub Model 273-100, 278-100, 278-214 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210720 | 210720 | Piper PA-23-250, PA E23-250 With... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA D210452 | D210452 | Prop-Jets 200B, 200C, 200D With Continental IO-520 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210436 | 210436 | Cessna 336, 337B, 337C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Feathering 210433 | 210433 | Raytheon A65, 70 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Type II J210800 | J210800 | Piper PA31-350 Right Engine Modified... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210340 | Woodward C210340 | Hartzell Propeller Hub Models HC-82,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210655 | Woodward C210655 | Hartzell Propeller Hub Models HC-M2YR-2,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA D210529 | D210529 | Cessna 404 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. H210452 | Woodward H210452 | Hartzell Propeller Hub Model HC-C2YF-1 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA Feathering B210403 | B210403 | Gulfstream 680FL, 680FL(P) | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA F210761 | F210761 | SOCATA TB20, TB21 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210415 | 210415 | Raytheon H35, K35, N35 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210467 | Woodward 210467 | Hartzell Propeller Hub Model HC-A3VF-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210721 | 210721 | Piper PA-23-250, PA-E23-250 With Hartzell... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. D210659 | Woodward D210659 | Hartzell Propeller Hub Model HC-C2YK-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210674 | Woodward 210674 | Hartzell Propeller Hub Model HC-H3YN-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA C210710 | C210710 | Cessna 336, 337B, 337C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA A210703 | A210703 | Cessna 404, 421C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA A210572 | A210572 | Piper PA31 Wide Deck Engine) Aerostar... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA B210572 | B210572 | Piper PA-60-602P (Aerostar Aircraft 602P) | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA D210490 | D210490 | Rockwell Commander 114 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. R210652 | Woodward R210652 | Hartzell Propeller Hub Model HC-M2YR-2 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. E210681 | Woodward E210681 | Hartzell Propeller Hub Models HC-C2YK-1, HC-C3YR-1 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210572 | Woodward C210572 | Hartzell Propeller Hub Models HC-E3YR-2/C,... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210285 | Woodward 210285 | Hartzell Propeller Hub Models HC-82X, HC-A3X20 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA B210415 | B210415 | Raytheon C33A, F33C, V35B | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA H210776 | H210776 | Maule M-5-180C, M-6-180, MX-7-180 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA F210680 | F210680 | Navion Aircraft H (S/N's prior to NAV 4-2553) | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA G210452 | G210452 | Cessna TU206G, T207, 210N | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA B210659 | B210659 | Cessna T310P, T310Q, 401 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA 210420 | 210420 | Piper PA30 approved only on N41FY S/N 30-924 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA B210680 | B210680 | Cessna R172E, R172F, R172G | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. C210681 | Woodward C210681 | Hartzell Propeller Hub Models HC-C2YL-1, HC-E2YR-1 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA R210571 | R210571 | Piper PA-31-325, PA-31-350 RH Engine | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210666 | Woodward 210666 | Hartzell Propeller Hub Model... | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - CSSA G210760 | G210760 | Cessna A185E, A185F, A188 | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor Assy. 210380 | Woodward 210380 | McCauley Propeller Hub Models 2A36C, B2A36C, D2A36C | 2007-05-14 | current |
| Ontic Engineering & Manufacturing INC | Governor - Assy. CSSA 210659 | 210659 | Cessna 336, 337, 337B | 2007-05-14 | current |
The first 150 of 394.
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.