SDR 2002FA0001191

Service difficulty report · Lock · Beech C23

Difficulty date: October 3, 2002
Submitted: October 18, 2002
Operation: General aviation
Aircraft: N837KS
Make and model: Beech C23
Aircraft serial: M2076
Engine: Lyc O360A4K
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Lock
Part number: 61156
Condition: Overtorqued
Location: Crankshaft
Stage of operation: IN
How discovered: V
Nature of condition: W
Precautionary procedure: K

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

What was found

LOCKPLATE FOR CRANKSHAFT GEAR RETAINING BOLT NOT SUFFICIENTLY BENT ALLOWING CRANKSHAFT GEAR BOLT TO LOOSEN. CRANKSHAFT GEAR DOWEL PIN SHEARED. RECOMMENDATION TO PREVENT RECURRENCE: CRANKSHAFT GEAR BOLT TORQUE SHOULD BE VERIFIED AT 204IN/LBS AND LOCKPLATE INSPECTED TO ENSURE PROPER LOCKING OF THE PLATE AGAINST THE BOLT HEAD.

More about the Beech C23