SDR AALA990479

Service difficulty report · Carbon Seal · Doug DC982

Difficulty date
April 6, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N430AA
Make and model
Doug DC982
Aircraft serial
49342
Engine
Pwa JT8D217C
Part
Carbon Seal
Part number
815754
Condition
Failed
Location
Lt Engine
Part time
11,030 hours
Stage of operation
CL
Nature of condition
K, J
Precautionary procedure
E, A

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

What was found

SMF - FLT 752 - DURING CLIMB-OUT, RIGHT ENGINE EXPERIENCED OIL QTY LOSS, RISE IN OIL TEMP, AND LOSS OF OIL PRESSURE. ENG WAS SECURED, THE CREW DECLARED AN EMERGENCY AND DIVERTED TO SMF. A/C LANDED SMF WITHOUT FURTHER INCIDENT. RIGHT ENGINE WAS REPLACED DUE TO OIL LOSS AND HIGH OIL TEMPERATURE. REQUIRED LEAK, OPERATIONAL, TRIM CHECKS WERE ACCOMPLISHED WITH NO ABNORMALITIES NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. THE NR 6 CARBON SEAL WAS BROKEN IN PIECES AND FOUND IN THE BOTTOM OF THE NR 6 BEARING HOUSING. THE PIECES PARTIALLY BLOCKED THE NR 6 SCAVENGE PUMP INLET SCREEN. THE BROKEN NUMBER 6 CARBON SEAL AND SCAVENGE PUMP INLET SCREEN BLOCKAGE CAUSED THE LOSS OF OIL. (M)

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