SDR 98ZZZX1886

Service difficulty report · Starter Gear · Bell 47

Difficulty date: May 6, 1997
Submitted: March 26, 2000
Operation: General aviation
Make and model: Bell 47
Engine: Lyc VO435A1A
System (JASC): 8540 · Reciprocating Engine Rear Section
Part: Starter Gear
Part number: 67610
Condition: Failed
Location: Lock Tabs
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

AFTER REVIEWING APRIL, 1998 ALERTS AL 43-16, ATA 8011, SUBMITTER REPORTS AN ADDITIONAL OCCURRENCE OF LOCK TAB FAILURE. ENGINE/AIRCRAFT WAS ON GROUND AND NO DAMAGE OCCURRED. DISASSEMBLY OF ENGINE REVEALED THAT LOCK TABS DID NOT COVER UP DOWELS AND ALLOWED THEM TO FALL OUT AND BOLTS TO BE SHEARED.

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