SDR TWAA9614802

Service difficulty report · Gearbox · Boeing 747131

Difficulty date: November 29, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N93108
Make and model: Boeing 747131
Aircraft serial: 19674
Engine: Pwa JT9D7A
System (JASC): 7260 · Turbine Engine Accessory Drive
Part: Gearbox
Part number: 746450001
Condition: Cracked
Location: Nr 2 Engine
Stage of operation: CR
Nature of condition: K, J
Precautionary procedure: O

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

What was found

JFK - FLT 6751 - DURING CRUISE, SHUT DOWN NR 2 ENGINE, SN 4199, DUE TO LOSS OF OIL. FOUND ACCESSORY GEARBOX, MFG PN 746450-001, CRACKED AT HYDRAULIC PUMP DRIVE. REPLACED ACCESSORY GEARBOX THEN ENGINE OPERATION AND LEAK CHECKS NORMAL. ENGINE TOTAL TIME: 72,518 HOURS; 14,326 CYCLES. CHECK C - 1-15-96 - MCI. (X)