SDR 20000724SH005

Service difficulty report · Valve · Cessna 172N

Difficulty date: July 5, 2000
Submitted: July 24, 2000
Operation: General aviation
Aircraft: N733FF
Make and model: Cessna 172N
Aircraft serial: 17268256
Engine: Lyc O320H2AD
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Valve
Condition: Seized
Location: Exhaust
Part time: 5,635 hours
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: O

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

What was found

NR 1 CYLINDER EXHAUST VALVE SEIZED IN GUIDE, DESTROYED PISTON. RESULTANT OIL SYSTEM CONTAMINATION HUNG NR 2 CYLINDER INTAKE LIFTER, BROKE CONNECTIN ROD, AND FAILED CASE. LYC MANDITORY SB NR 388B DATED MAY 13, 1992, ADDRESSES SCHEDULED VALVE TO GUIDE CLEARANCE INSPECTIONS. C/W THIS INSPECTION MAY PRECLUDE POTENTIAL SIMILAR INCIDENTS. (X)

More about the Cessna 172N