Service difficulty report · Impulse Coupling · Cessna 172S

Difficulty date
May 19, 2021
Submitted
May 19, 2021
Operation
General aviation
Aircraft
N513WF
Make and model
Cessna 172S
Aircraft serial
172S9756
Aircraft time
7,024 hours
Engine
Lyc IO360L2A
Engine time
1,697 hours
Part
Impulse Coupling
Condition
Migrated
Location
Magneto
Component
Magneto · Champion · 4371
Component part number
4371
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

WHILE PERFORMING AN I.R.A.N. INSPECTION ON THE SLICK MAGNETOS (4371) I DISCOVERED THAT BOTH MAGNETO'S IMPULSE COUPLING STOP PINS WERE MIGRATING OUT OF THE HOUSINGS. THESE MAGNETOS ARE OUTSIDE OF SLICK SB1-19 SERIAL NUMBER RANGE. THE SERIAL NUMBERS OF THE MAGS ARE 18081227 AND 18081228. THE STOP PINS HAD MIGRATED ABOUT 1/4 INCH. I HAVE LEFT VOICEMAIL'S AND ELECTRONIC SUBMISSION WITH CHAMPION AEROSPACE WITH NO REPLY YET.

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