SDR 20010420CW002

Service difficulty report · Crankcase · Piper PA31350

Difficulty date: March 29, 2001
Submitted: April 20, 2001
Operation: Air carrier
Aircraft: N31PR
Make and model: Piper PA31350
Aircraft serial: 317952049
Engine: Lyc TIO540*
Propeller: Hartzl HCC3YR2
System (JASC): 8520 · Reciprocating Engine Power Section
Part: Crankcase
Part number: 11F20022D3
Condition: Cracked
Location: Lt Engine
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

REMOVED COWLINGS TO CHANGE/SERVICE ENGINES WITH OIL. FOUND LEFT ENGINE CASE CRACKED ABOVE NR 6, NR 4, AND NR 1 TAPPET HOUSING. ALL THREE CRACKS APPEARED TO BE PUSHED FROM INSIDE OUT. NONE WERE LEAKING OIL YET AND HAD NOT BEEN PRESENT 20 HOURS EARLIER. WHEN LAST WORK WAS DONE IN ENGINE COMPARTMENT.

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