Service difficulty report · Pushrod · Cessna 180F

Difficulty date
July 25, 2000
Submitted
August 16, 2000
Operation
General aviation
Aircraft
N2163Z
Make and model
Cessna 180F
Aircraft serial
18051263
Engine
Cont O470R
Part
Pushrod
Part number
652451
Condition
Plugged
Part time
190 hours
Stage of operation
IN
How discovered
V
Nature of condition
W
Precautionary procedure
O

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

What was found

C/W TCM SB MSB00-5B, (REPLACING CRANKSHAFT), FOUND PUSH ROD TUBE FOR NR 6 EXHAUST VALVE PLUGGED. THIS APPARENTLY WAS MIS-MANUFACTURED. FROM THE VALVE END IN APPROXIMATELY .1250 INCH FOR AN ADDITIONAL .3750 INCH. THE TUBE IS SOLID, SO NO OIL MAY PASS THROUGH. THIS CAUSED MATERIAL FROM THE ROCKER ARM BUSHING TO TRANSFER TO THE ROCKER ARM SHAFT FROM LACK OF PROPER LUBRICATION. THIS NECESSITATED REPLACEMENT OF THE PUSH ROD, ROCKER ARM ASSY AND ROCKER ARM SHAFT. IT APPEARS THAT IN MANUFACTURING, THE TUBE BECAME PLUGGED WHEN THE BALL END WAS INSTALLED. (X)

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