SDR 99ZZZX2726

Service difficulty report · Bearing

Difficulty date: September 14, 1998
Submitted: March 26, 2000
Operation: General aviation
Engine: Lyc O540E4C5
System (JASC): 7414 · Magneto/Distributor
Part: Bearing
Condition: Failed
Location: Lt/Rt Magneto
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

OPERATORS OF AVCO LYCOMING O-540-E4C5 ENGINES FITTED TO BRITTEN NORMAN ISLANDER AIRCRAFT IN GUYANA HAVE BEEN EXPERIENCING PREMATURE FAILURE OF THE MAGNETO DRIVE GEAR BEARINGS. THERE HAVE BEEN INSTANCES OF REPORTED HARD STARTING. ON INVESTIGATION, THE BEARINGS ARE DISCOVERED DAMAGED. THE ENGINES ARE THEN REMOVED FROM SERVICE.