SDR 98ZZZX1544

Service difficulty report · Rocker Boss · Cessna 182P

Difficulty date: March 23, 1998
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N21477
Make and model: Cessna 182P
Aircraft serial: 18261657
Engine: Cont O470R
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Rocker Boss
Condition: Failed
Location: Nr 2 Cyl Exhaust
Part time: 2,766 hours
Stage of operation: CL
Nature of condition: E, R, K
Precautionary procedure: A

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

What was found

ABOUT 4 MINUTES AFTER TAKEOFF, ENGINE RAN ROUGH. A NORMAL LANDING WAS MADE. REMOVED COWL, NR 2 VALVE COVER HAD A 1 INCH HOLE IN IT. REMOVED VALVE COVER AND FOUND BOTH ROCKER SHAFT FORGED BOSSES BROKEN FOR EXHAUST ROCKER SHAFT. VALVE WAS NOT STUCK. PUSH ROD WAS NOT BENT. OLD AGE?

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