SDR 97ZZZX790

Service difficulty report · Distributor Blk · Cessna 140

Difficulty date
January 20, 1997
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N1859V
Make and model
Cessna 140
Aircraft serial
14038
Engine
Cont C8512F
Part
Distributor Blk
Condition
Worn
Location
Lt Mag
Part time
54 hours
Component
Slick · 4301
Stage of operation
IN
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

TROUBLESHOT IGNITION SYSTEM. FOUND LEFT MAGNETO TO BE PROBLEM. DISASSEMBLED MAGNETO AND FOUND ROTOR GEAR RUBBING ON DISTRIBUTOR BLOCK HOUSING. DISTRIBUTOR BLOCK HOUSING WAS WARPED. ALSO FOUND BUSHING IN DISTRIBUTOR BLOCK HOUSING WAS WORN THROUGH ON SIDE TOWARDS CONDENSER. WEAR HAD PROGRESSED INTO PLASTIC SURROUNDING BUSHING. SEVERE ARCING AND CARBON TRACKING WAS PRESENT IN HOUSING. FOUND THAT THE ROTOR GEAR WAS NOT PRESSED INTO PLACE AS IS REQUIRED IN SLICK SM. SUBMITTER STATES THE SEALING MARK IS PUT ON MAGNETO HOUSING SCREW AT FACTORY HAD NOT BEEN BROKEN PRIOR TO MECHANIC DOING SO FOR INSPECTION.

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