Service difficulty report · Gear

Difficulty date
June 22, 2007
Submitted
June 29, 2007
Operation
General aviation
Part
Gear
Part number
1068256013
Condition
Damaged
Location
Magneto
Stage of operation
NR
How discovered
V
Nature of condition
E
Precautionary procedure
K

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

What was found

REPAIR STATION RECEIVED MAGNETO FOR REPAIR. WHEN THE UNIT WAS DISASSEMBLED IT WAS NOTED BOTH DISTRIBUTOR GEARS TCM PN 10-682016 WERE MISSING TEETH. IT WAS NOTED THAT A PATTERN OF TEETH THAT WERE MISSING COULD BE SEEN. A TOTAL OF 5 TEETH WERE MISSING FROM BOTH GEARS. WHAT SEEMS TO HAPPEN IS WHEN THE IMPULSE SNAPS THE IMPULSE SNAPS THAT TOOTH OFF THE GEAR? WHEN ASSEMBLED TO VIEW THE GEAR POSITION IT WAS NOTED THAT ONE TOOTH WAS MISSING WITH FIVE EACH OF THE SIX TOTAL ENGAGEMENTS OF THE IMPULSE. ITEMS THAT COULD CONTRIBUTE TO THIS PROBLEM CAN BE FOUND IN SB658. IT IS RECOMMENDED TO FOLLOW SB658 AND TO INSPECT THE DISTRIBUTOR GEARS ON ALL IMPULSE D-3000 OR D-2000 UNITS FOR WEAR AT EVERY 100 HRS BY REMOVING THE MAGN