The U.S. aircraft register, updated daily
Parts · Engine

Impulse Coupling

123 failure reports named the impulse coupling in the last ten years, 289 since 1995, most often on the Cessna 172 Skyhawk; the condition most often found was "loose". 47 FAA approvals let 2 companies make a replacement impulse coupling, Hartzell Engine Technologies LLC holding the most (27).

Reports by year

013263851199520002005201020152020202582026
Reports by year, as a table
reports
19958
19965
19975
199812
199915
20007
20014
200210
200310
20048
20055
20062
20071
20084
20097
20106
20116
20123
20131
201441
20156
20162
20171
20185
20197
202011
20214
202227
202351
20242
20255
20268

Which system the reports file it under last ten years

Engine123
Reports by system, as a table
reports
Engine123

Models most often reporting it last ten years

Cessna 172 Skyhawk13Piper PA-28 Cherokee, Warrior, Archer and Arrow9Piper PA-32 Cherokee Six, Lance and Saratoga3Cessna 182 Skylane2Moravan Z2422Beechcraft V35 Bonanza1Cessna 1521Cessna 4021Cirrus SR201Mooney M-201Pilatus Britten-Norman Ltd. BN-21Piper PA-30 Twin Comanche1
Models most reported, as a table
reports
Cessna 172 Skyhawk13
Piper PA-28 Cherokee, Warrior, Archer and Arrow9
Piper PA-32 Cherokee Six, Lance and Saratoga3
Cessna 182 Skylane2
Moravan Z2422
Beechcraft V35 Bonanza1
Cessna 1521
Cessna 4021
Cirrus SR201
Mooney M-201
Pilatus Britten-Norman Ltd. BN-21
Piper PA-30 Twin Comanche1

How it failed the condition found, last ten years

loose75defective13failed7unserviceable7broken6destroyed5damaged3faulted1jammed1malfunctioned1
Conditions found, as a table
reports
loose75
defective13
failed7
unserviceable7
broken6
destroyed5
damaged3
faulted1
jammed1
malfunctioned1

Engines most often reporting it

Lycoming IO-360-L2A 37Lycoming O-360-A4M 28Lycoming IO-360-B4A 9Lycoming O-320-D3G 6Lycoming O-360-A1H6 6Lycoming AEIO-360-A1B6 3Lycoming IO-540-AB1A5 2Lycoming IO-540-K1G5 2Lycoming O-320-E2D 2Continental IO-360-ES 1

Approved replacement parts 47 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a impulse coupling and sell it as an approved part for the models named. These are the companies holding such approvals for a impulse coupling:

Hartzell Engine Technologies LLC 27Kelly Aerospace Energy Systems LLC 20

For these models most: Northrop C-125 (1), Beechcraft A100 (1).

MakerPartReplacesFitsGrantedStatus
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3635M3635Lycoming Engines O-540-A1A5, O-540-A1B5, O-540-A1C52024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3994M3994Continental... A-50-8, A-65-8, A-65-8F2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3590M3590Continental... A100-1, A100-2, C-115-12024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy ES3100M3100Lycoming Engines O-235-K2B, O-235-K2C, O-235-L2A2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Spring ES917M917Continental... A-50-8, A-65-1, A-65-122024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3068M3068Continental... C75-8, C75-8F, C75-8FH2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Spring ES917M917Continental Motors Inc A-80-6J, A-80-8, A-80-8J2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3994M3994Continental Motors Inc A-80-6J, A-80-8, A-80-8J2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Spring ES917M917Lycoming Engines O-235-C1, O-235-C1A, O-235-C1C2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3007M3007Continental... A-65-12, A-65-12F, A-65-12FJ2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3050M3050Continental... LTSIO-360-E, LTSIO-360-EB, LTSIO-360-KB2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Spring ES917M917Lycoming Division... O-290-D, O-290-D2, O-290-D2A2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3163M3163Superior Air Parts IO-360-A1A1, IO-360-A1A2, IO-360-A2A12024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3524M3524Continental... GO-300-B, GO-300-C, GO-300-D2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3529M3529Lycoming Division... O-290-D2, O-290-D2B, O-290-D2C2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3529M3529Lycoming Engines O-235-C1, O-235-C2A, O-235-E2A2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3089M3089Continental... IO-360-A, IO-360-AB, IO-360-C2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3163M3163Lycoming Engines O-235-C2C, O-235-H2C, O-235-N2C2024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3333M3333Lycoming Engines AEIO-540-D4B5, AEIO-540-L1B5, AEIO-540-L1D52024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3689M3689Lycoming Engines LIO-360-C1E62024-05-20current
Hartzell Engine Technologies LLCImpulse Coupling Assy. ES3068M3068Lycoming Engines LIO-320-B1A, LIO-320-C1A, LIO-360-B1G62024-05-20current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3529Champion Aerospace/Unison/ Slick M3529Textron Lycoming O-235-C1, -C2A, -C2C2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3089Champion Aerospace/Unison/ Slick M3089Continental Motors IO-360-A, -B-, -C2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3333Champion Aerospace/Unison/ Slick M3333Textron Lycoming O-540-A1B5, -A4A5, -B2C5 E4C52017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3163Champion Aerospace/Unison/ Slick M3163Textron Lycoming O-235-C2C, -H2C, -N2C2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3100Champion Aerospace/Unison/ Slick M3100Textron Lycoming O-235-K2B, -K2C, -L2A2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3524Champion Aerospace/Unison/ Slick M3524Continental Motors GO-300-A, -B, -C2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3050Champion Aerospace/Unison/ Slick M3050Continental Motors IO-470-A, -C, -D2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3007Champion Aerospace/Unison/ Slick M3007Continental Motors C-75-12, -12F, -12FH2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3068Champion Aerospace/Unison/ Slick M3068Continental Motors C-75-8, -8F, -8FH2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3635Champion Aerospace/Unison/ Slick M3635Textron Lycoming O-540-A1A5, -A1B5, A1C52017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3590Champion Aerospace/Unison/ Slick M3590Continental Motors C-145-2, -2H, -2HP2017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3689Champion Aerospace/Unison/ Slick M3689Textron Lycoming LIO-360-C1E62017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy. ES3994Champion Aerospace/Unison/ Slick M3994Continental Motors A-65-1, -3, -62017-02-27current
Kelly Aerospace Energy Systems LLCImpulse Coupling Spring ES917Champion Aerospace/Unison/ Slick P/N M917Continental Motors A-65, -1, -32015-08-16current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy (CCW 15 Deg.) ES10- 400322TCM/Bendix 10- 400322 When used in TCM Bendix...Textron Lycoming HIO-360-E1AD, IO-360-A1B6D, A1D6D2012-11-29current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy (CW 20 Deg.) ES10- 400311TCM/Bendix 10- 400311 When used in TCM Bendix...Textron Lycoming O-320-H1AD, O-320-H2AD, H3AD...2012-11-29current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy (CCW 10 Deg.) ES10- 400326TCM/Bendix 10- 400326 When used in TCM Bendix...Textron Lycoming AEIO-540-L1B5D IO-540-K1E5D, K1G5D, L1A5D2012-11-29current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy (CCW 20 Deg.) ES10- 400324TCM/Bendix 10- 400323 When used in TCM Bendix...Textron Lycoming LO-360-E1A6D O-360-A1G6D2012-11-29current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy (CCW 15 Deg.) ES10- 400325TCM/Bendix 10- 400325 When used in TCM Bendix...Textron Lycoming IO-540-T4A5D, T4B5D, V4A5D2012-11-29current
Kelly Aerospace Energy Systems LLCImpulse Coupling Assy (CCW 25 Deg.) ES10- 400323TCM/Bendix 10- 400323 When used in TCM Bendix...Textron Lycoming IO-360-A1B6D, A3B6D, C1E6D O-360-A1AD2012-11-29current
Hartzell Engine Technologies LLCImpulse Coupling Assy (CCW 15 Deg) ES10-400322TCM/Bendix 10-400322 when used in TCM Bendix...Textron Lycoming HIO-360-E1AD, IO-360-A1B6D, IO-360-A1D6D2011-02-01current
Hartzell Engine Technologies LLC.Impulse Coupling Assy (CCW 10 Deg) ES10-400326TCM/Bendix 10-400326 when used in TCM Bendix...Textron Lycoming AEIO-540-L1B5D, IO-540-K1E5D, IO-540-K1G5D2011-02-01current
Hartzell Engine Technologies LLCImpulse Coupling Assy (CCW 20 Deg) ES10-400324TCM/Bendix 10-400324 when used in TCM Bendix...Textron Lycoming LO-360-E1A6D, O-360-A1G6D2011-02-01current
Hartzell Engine Technologies LLCImpulse Coupling Assy (CCW 15 Deg) ES10-400325TCM/Bendix 10-400325 when used in TCM Bendix...Textron Lycoming IO-540-T4A5D, IO-540-T4B5D, IO-540-V4A5D2011-02-01current
Hartzell Engine Technologies LLCImpulse Coupling Assy (CCW 25 Deg) ES10-400323TCM/Bendix 10-400323 when used in TCM Bendix...Textron Lycoming IO-360-A1B6D, IO-360-A3B6D, IO-360-C1E6D2011-02-01current
Hartzell Engine Technologies LLCImpulse Coupling Assy (CW 20 Deg) ES10-400311TCM/Bendix 10-400311 when used in TCM Bendix...Textron Lycoming O-320-H1AD, O-320-H2AD, O-320-H3AD2011-02-01current

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.