SDR 2020FA0000102

Service difficulty report · Cylinder · Cessna 172E

Difficulty date: May 10, 2019
Submitted: January 29, 2020
Operation: General aviation
Aircraft: N3916S
Make and model: Cessna 172E
Aircraft serial: 17251116
Engine: Cont O300E
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Cylinder
Part number: SA10200A20P
Part serial: 20B1339689
Condition: Cracked
Location: Engine
Stage of operation: NR
How discovered: 9
Nature of condition: E, R
Precautionary procedure: A

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

What was found

PILOT REPORTED A LOUD POP/BANG. THEN RPM DROPPED TO 1200 AND LOSS OF POWER. APPROXIMATELY 30 SECONDS, RPM DROPPED TO 400, THEN ENGINE STOPPED, ACFT LANDED SAFELY IN FIELD. INSPECTION, ONCE COWLING WAS REMOVED (DAMAGE NEAR NR 3 CYLINDER). CYLINDER HAD SEPARATED CENTER OF CYLINDEDR BASE AREA.

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