SDR EIAA9616640

Service difficulty report · Seal · Boeing 747SR46

Difficulty date: October 3, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N689UP
Make and model: Boeing 747SR46
Aircraft serial: 21033
Engine: Pwa JT9D7F
System (JASC): 7260 · Turbine Engine Accessory Drive
Part: Seal
Part number: MS9388153
Condition: Leaking
Location: Nr 4 Engine
Part time: 6,275 hours
Stage of operation: CR
Nature of condition: E, J
Precautionary procedure: O

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

What was found

ANC - NR 4 ENGINE PRECAUTIONARY SHUT DOWN AT FL 331, MACH .84, DUE TO LOW OIL QTY AND FLUCTUATING PRESSURE (30 PSI). UPON TROUBLESHOOTING, FOUND OIL COMING FROM THE GENERATOR PAD DRAIN LINE. REPLACED THE GENERATOR PAD DRIVE SEAL PER MM. LEAK CHECK AND OPS CHECK WERE OK. (X)

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