SDR 2014FA0000604

Service difficulty report · Cylinder · Piper PA31350

Difficulty date: August 6, 2014
Submitted: October 15, 2014
Operation: General aviation
Aircraft: N42MH
Make and model: Piper PA31350
Aircraft serial: 317852015
Aircraft time: 7,300 hours
Engine: Lyc LTIO540J2B
Engine time: 1,400 hours
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Cylinder
Condition: Separated
Location: Engine
Stage of operation: CR
How discovered: O
Nature of condition: R, K, B
Precautionary procedure: E, A

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

What was found

DURING CRUISE AT 6000 FT, RT ENGINE SOUND CHANGED , LOST A SMALL AMOUNT OF POWER, PILOT ADDED POWER, FIVE MINUTES LATER OIL APPEARED ON COWLING, AGAIN LOST MORE POWER, MORE OIL ON COWLING. FEATHERED ENGINE AND LANDED. NR 1 CYLINDER HAD SEPARATED AT THE BOTTOM HOLD DOWN STUDS. STUDS WERE OBSERVED BROKEN OFF AND PULLED OUT OF CRANKCASE. TOP HOLD DOWN STUDS STILL HOLDING.

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