SDR 2003FA0001082

Service difficulty report · Cylinder Head

Difficulty date: October 15, 2003
Submitted: October 15, 2003
Operation: General aviation
Engine: Cont IO520*
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Cylinder Head
Condition: Failed
Location: Engine
Stage of operation: IN
How discovered: V
Nature of condition: P
Precautionary procedure: K

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

What was found

CYLINDER RECEIVED FOR TBO REPAIR. CYLINDER HEAD IS CRACKED FROM TOP SPARK PLUG BOSS AROUND THE DOME AREA ON THE EXHAUST SIDE OF THE HEAD, ALL THE WAY TO THE LOWER SPARK PLUG BOSS. NO EVIDENCE OF COMBUSTION PRODUCTS ON THE OUTSIDE OF THE CYLINDER HEAD SO CRACK HAS NOT PROGRESSED COMPLETELY THROUGH THE CYLINDER HEAD WALL. PART IS REJECTED.