Service difficulty report · O-Ring

Difficulty date
March 19, 2015
Submitted
August 5, 2015
Operation
General aviation
Engine
Pwa PT6A66
Part
O-Ring
Condition
Missing
Location
Filler Cap
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

(CAN) 3 EVENTS WERE REPORTED BY MFG, FAULTY INDICATION ON THE FILLER CAP AND OIL LEVEL INDICATOR, PN 3075906-01. FOLLOWING AN INVESTIGATION AT THE SUPPLIER, THEY CONFIRMED THE ISSUE WAS CAUSED BY THE ABSENCE OF THE O-RING WHICH ALLOWS MOISTURE TO INFILTRATE THE OIL LEVEL INDICATOR BODY RESULTING IN CORROSION OF THE SOLDERED CONNECTOR LEADS. THIS CONDITION CREATES A BATTERY LIKE CONDITION THAT PREMATURELY DEGRADES THE OPERATION OF THE OIL LEVEL INDICATOR TO THE POINT OF RENDERING IT INOPERABLE. THE RESULTS OF THE SUPPLIER`S INITIAL INVESTIGATION INDICATE THE ISSUE IS LIMITED TO A BATCH OF APPROXIMATELY 60 PARTS. MFG IS IN THE PROCESS OF ISSUING AN INSPECTION SB.