SDR 95ZZZX3471

Service difficulty report · Cylinder · Cessna 170B

Difficulty date: June 26, 1995
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N3143A
Make and model: Cessna 170B
Aircraft serial: 25787
Engine: Cont C1452
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Cylinder
Condition: Failed
Location: Nr 3 Exhaust
Stage of operation: IN
Nature of condition: E, R
Precautionary procedure: K

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

What was found

STUDENT PILOT REPORTED ENGINE RAN ROUGH ON RUN-UP. FOUND NR 3 EXHAUST VALVE STUCK OPEN. ALSO, FOUND INTAKE ROCKER ARM (WITH NO OIL ORIFICE) INSTALLED ONE EXHAUST SIDE - POSSIBLY CONTRIBUTING TO STUCK VALVE. SEE CONT SB M77-19. OTHER AIRCRAFT HAVE BEEN FOUND WITH ROCKER ARMS INCORRECTLY INSTALLED, NOT UNUSUAL.

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