Service difficulty report · Impulse Coupling

Difficulty date
November 7, 2022
Submitted
November 14, 2022
Operation
General aviation
Aircraft
N984AV
Engine
Lyc IO360L2A
Engine time
2,307 hours
Part
Impulse Coupling
Part number
M3163
Condition
Broken
Location
Magneto
Part time
370 hours
Component
Magneto · Champion
Component part number
4371
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
O

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

What was found

LEFT MAGNETO P/N 4371 HAD AN IMPULSE COUPLING P/N M3163 PAW RIVET SHEAR, ENGINE CONTAMINATED WITH METAL AND REMOVED FROM SERVICE. THE MAGNETO IMPULSE COUPLING HAD APPROXIMATELY 370HRS IN SERVICE.