SDR 99ZZZX4603

Service difficulty report · Line · Cessna 172N

Difficulty date: November 22, 1999
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N4964G
Make and model: Cessna 172N
Aircraft serial: 17273511
Engine: Lyc O320H2AD
System (JASC): 8550 · Reciprocating Engine Oil System
Part: Line
Condition: Cracked
Location: Crankcase
Part time: 3,222 hours
Stage of operation: IN
Nature of condition: K
Precautionary procedure: K

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

What was found

INVESTIGATED OIL LEAK. FOUND CRANKCASE TO BE CRACKED AT LEFT FRONT OF CASE. CRACK STARTS AT LOWER THROUGH STUD HOLE, RUNS BACK HORIZONTALLY .50 INCH THEN VERTICAL 2.50 INCHES. AIRCRAFT WAS INVOLVED IN A PROPELLER STRIKE 1,330 HOURS AGO. SUSPECT THIS MAY HAVE LED TO THE CRACK.

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