Service difficulty report · Pump · Boeing 757222

Difficulty date
December 16, 2020
Submitted
December 16, 2020
Operation
Air carrier
Aircraft
N798FD
Make and model
Boeing 757222
Aircraft serial
28144
Aircraft time
59,408 hours, 23,478 cycles
Part
Pump
Part number
731966
Part serial
MX457708
Condition
Failed
Location
Hyd System
Part time
1,852 hours, 1,249 cycles
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

AT BLOCK IN HAD LARGE HYDRAULIC LEAK IN LEFT MLG WHEEL WELL. SHIFT NOTE: A/C 798 GROUND EMERGENCY AT BLOCK-IN MX SUSPECTED FIRE IN LEFT WHEEL WELL. FOUND LEFT HYDRAULIC ACMP FAILED. LEFT SYSTEM WAS LEAKING OUT OF ACMP. REMOVED LEFT ACMP, PER AMM 29-11-01-4 AND FOUND ELECTRICAL WIRING BURNT INSIDE PUMP. REQUIRES LEFT SYSTEM ACMP REPLACEMENT. FF MPN: 731966 POS: P1 SRL: MX-457708 TAG NBR: 10H755 ON MPN: 731966 CPN: 2912446 SRL: MX-503127 TAG NBR: 7652E5. R & R LT A/C HYDRAULIC PUMP, IAW M/M 29-11-01-4-0. OPERATIONS CHECK GOOD.