SDR 2023FA0000539

Service difficulty report · Rocker · Cessna 172M

Difficulty date: September 14, 2023
Submitted: September 14, 2023
Operation: General aviation
Aircraft: N9012H
Make and model: Cessna 172M
Aircraft serial: 17265899
Aircraft time: 10,581 hours
Engine: Lyc O320D2J
Engine time: 2,552 hours
Propeller: Mcauly 1C160DTM
System (JASC): 8500 · Engine (Reciprocating)
Part: Rocker
Part number: 17F1935715F28835
Part serial: NA
Condition: Damaged
Location: Valve Train
Part time: 2,552 hours
Component: Engine · Lyc
Stage of operation: IN
How discovered: V
Nature of condition: P, O, O
Precautionary procedure: K, O, O, O

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

What was found

LYCOMING FACTORY REBUILT O-320-D2J, S/N RL-20764-39E. DURING ROUTINE MX, SB388C (EXHAUST VALVE GUIDE INSPECTION) FOUND 7EA ROCKER ARMS P/N 17F19357, 1 EA PUSH ROD P/N 15F28835-09, 6EA PUSH RODS P/N 15F28835-10, 7EA TAPPET SOCKETS P/N 15B21319 & 7EA PLUNGERS P/N 15B26066 TO HAVE MECHANICAL DAMAGE (HEAVY SCUFF - SCORING)

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