Service difficulty report · Static Seal · Saab SF340A

Difficulty date
August 15, 1995
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N741BA
Make and model
Saab SF340A
Aircraft serial
340A090
Engine
Ge CT75A2
Part
Static Seal
Condition
Excess Clearance
Location
A-Sump
Part time
13,316 hours
Stage of operation
CR
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

HIGH OIL TEMPERATURE, OIL PRESSURE FLUCTUATION AND LOSS IS BELIEVED TO BE THE RESULT OF EXCESSIVE CLEARANCE BETWEEN THE NR 3 LABRYNTH SEAL AND ITS ASSOCIATED STATIC SEAL, THE A-SUMP SUPPORT SEAL, WHICH CAUSED SUMP AIRFLOWS INSUFFICIENT TO PREVENT EXCESSIVE LOSS OF OIL INTO THE MAIN FRAME/COMPRESSOR. (M)

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