Service difficulty report · Impulse Coupling

Difficulty date
August 1, 2011
Submitted
September 9, 2011
Operation
General aviation
Engine
Lyc AEIO360A1B6
Propeller
Muhbr MTV9*
Part
Impulse Coupling
Part number
M3100
Condition
Worn
Location
Magneto
Part time
200 hours
Component
Magneto · 4370
Stage of operation
IN
How discovered
9
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

IMPULSE COUPLING SHOWED WORN RIVET AND EXCESSIVE PAWL GAP AFTER ONLY 200 HRS TIME IN SERVICE. THIS SHOP PERFORMS SLICK SB 1-86 EVERY 100 HRS INSTEAD OF THE RECOMMENDED 500 DUE TO PREVIOUS EXPERIENCE. THIS IMPULSE COUPLING WOULD NOT HAVE LASTED ANOTHER 300 HRS IN AME`S OPINION.