SDR 96ZZZX2407

Service difficulty report · Piston · Cessna 421C

Difficulty date: April 2, 1996
Submitted: March 26, 2000
Operation: General aviation
Aircraft: N67934
Make and model: Cessna 421C
Aircraft serial: 421C1026
Engine: Cont GTSIO520N
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Piston
Part number: 646303
Condition: Burned
Location: Lt Eng Nr 5
Stage of operation: NR
Nature of condition: R
Precautionary procedure: K

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

What was found

AIRCRAFT LOST POWER ON NR 1 ENGINE. REMOVAL OF NR 5 CYLINDER REVEALED PISTON DOME EDGE BURNED AWAY FROM 6:00 POSITION TO 12:00 POSITION. AT 9:00 POSITION, PISTON DOME BURNED COMPLETELY THROUGH, APPROXIMATELY 1 INCH OF PISTON MATERIAL MISSING FROM EDGE TOWARDS CENTER OF DOME.

More about the Cessna 421C