SDR EIAA9562

Service difficulty report · Carbon Seal · Boeing 747212B

Difficulty date
November 25, 1995
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N482EV
Make and model
Boeing 747212B
Aircraft serial
20713
Engine
Pwa JT9D7F
Part
Carbon Seal
Condition
Leaking
Location
Hyd Pump
Stage of operation
NR
Nature of condition
K, J
Precautionary procedure
E

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

What was found

JFK - LOG PAGE F00707 - NR 4 ENGINE OIL QUANTITY INDICATOR STEADILY DROPPED TO APPROXIMATELY 1 GALLON, THEN PEGGED OUT. SHUT DOWN ENGINE DUE TO FLUX OIL PRESSURE AND UNKNOWN QUANTITY, MAXIMUM TEMPERATURE 110 DEGREES FOR 1 MINUTE, WINDMILLING PRESSURE, 14 PSI. OPS CHECK OF ENG, SYSTEM WORKS NORMALLY. PERFORMED ENG WINDMILLING INSP PER 72-00-00, GEARBOX STATIC LEAK CHECK CARRIED OUT, FOUND HYD PUMP SEAL DRAIN LEAKING, CHANGED CARBON SEAL. AFTER POWER RUN, FOUND NR 3 BEARING DRAIN ELBOW LEAKING. REPLACED ELBOW, FOUND COVER ON GEARBOX LEAKING, RETORQUED BOLTS. REFERENCE OPERATOR CONTROL NR 95ZZZX6633. (X)

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