SDR 2003FA0000525

Service difficulty report · Plug · Cessna 172S

Difficulty date: May 21, 2003
Submitted: May 21, 2003
Operation: General aviation
Aircraft: N518ER
Make and model: Cessna 172S
Aircraft serial: 172S8922
Aircraft time: 1,401 hours
Engine: Lyc O360*
Engine time: 1,401 hours
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Plug
Part number: STD1211
Condition: Loose
Location: Camshaft
Part time: 1,401 hours
Component: Crankshaft · Lyc
Component part number: 13B27121
Stage of operation: CL
How discovered: O
Nature of condition: K
Precautionary procedure: A

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

What was found

WHILE PRACTICING TOUCH AND GOES, THE INSTRUCTOR NOTICED A THIN FILM OF OIL ON THE WINDSHIELD. IT QUICKLY GOT WORSE. MADE EMERGENCY LANDING. MAINTENANCE DISCOVERED THE CRANKSHAFT PLUG HAD COME LOOSE. OIL LEVEL WAS AT 4.5 QTS. REPLACED CRANK PLUG, CHECKED ENGINE BREATHER LINES (CLEAR), CLEANED AIRCRAFT, SERVICED OIL AND PUT AIRCRAFT BACK INTO SERVICE. MFG CONTACTED AND INFORMED OF THE INCIDENT.

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