SDR 2023FA0000613

Service difficulty report · Rocker · Cessna 172M

Difficulty date: October 19, 2023
Submitted: October 19, 2023
Operation: General aviation
Aircraft: N9643Q
Make and model: Cessna 172M
Aircraft serial: 17265727
Aircraft time: 13,897 hours
Engine: Lyc O320D2J
Engine time: 4,244 hours
Propeller: Mcauly 1C160DTM
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Rocker
Part number: 15F288351017F193
Part serial: NA
Condition: Damaged
Location: Valve Train
Part time: 99 hours
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

LYCOMING FACTORY OVERHAULED O-320-D2J, S/N L-17060-39E. DURING ROUTINE MX, SB388C (EXHAUST VALVE GUIDE INSP.) FOUND 4EA PUSH RODS P/N 15F28835-10, 2EA PUSH RODS P/N 15F28835-09, 6EA ROCKER ARMS P/N17F19357, 6EA SOCKETS P/N 15B21319 & 6EA LIFTERS P/N 15B26066 TO HAVE MECHANICAL DAMAGE (HEAVY SCUFF -SCORING)

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