Service difficulty report · Crankshaft · Cessna 172P

Difficulty date
January 2, 1996
Submitted
March 26, 2000
Operation
Air carrier
Make and model
Cessna 172P
Engine
Lyc O320D2J
Part
Crankshaft
Part number
LW17031
Condition
Eccentric
Location
Nr1 Brg Bore
Part time
3,437 hours
Component
Lyc
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

(CAN)THE CRANKSHAFT WAS INSPECTED IN ACCORDANCE WITH LYCOMING SB 505A AND FOUND PITTED. WHEN REPAIRS OF THE AFFECTED AREA WERE ATTEMPTED THE CENTRE BORE OF THE CRANKSHAFT WAS FOUND TO BE ECCENTRIC, WITH TH E #1 BEARING CIRCUMFERENCE OFFSET BY .085". THE CRANKSHAFT WAS NOT REPAIRABLE AND IS CONSIDERED SCRAP. THIS CRANKSHAFT HAS NOT BEEN MODIFIED OR ALTERED SINCE NEW, SO IT MUST BE CONSIDERED THAT IT WAS MANUFACTURED WITH THE INNER CRANKSHAFT BORE ECCENTRIC.

More about the Cessna 172P