Service difficulty report · Impulse Coupling · Cessna 172M

Difficulty date
July 8, 2026
Submitted
July 17, 2026
Operation
General aviation
Aircraft
N5367H
Make and model
Cessna 172M
Aircraft serial
17265414
Aircraft time
9,275 hours
Engine
Lyc O320E2D
Engine time
5,199 hours
Part
Impulse Coupling
Part number
ES3163
Condition
Sheared
Location
Magneto
Part time
561 hours
Component
Magneto · Hartzl · 4371
Component part number
ES4371
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT REPORTED TO BE HARD TO START OVER MULTIPLE STARTS. DURING 100HR INSPECTION REMOVED LEFT MAGNETO P/N 4371 AND DISASSEMBLED FOR INSPECTION. DURING INSPECTION OF MAGNETO FOUND 1 PAWL PIN SHEARED FROM IMPULSE COUPLING.

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