Service difficulty report · Pump · Boeing 7377H4

Difficulty date
September 25, 2023
Submitted
June 5, 2026
Operation
Air carrier
Aircraft
N925WN
Make and model
Boeing 7377H4
Aircraft serial
36630
Aircraft time
50,322 hours, 30,478 cycles
Part
Pump
Part number
887477
Part serial
MX611989
Condition
Leaking
Location
Zone 100
Stage of operation
CR
How discovered
O
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

LOSS OF SYSTEM HYDRAULIC B;2 LOW-PRESSURE LTS AND QUANTITY ZERO. REF #TTG8Q00NMN78 FOR JOB PERFORMED. R & R NR 2 ENG EDP PER AMM 29-11-11; R&R B SYS CASE DRAIN FILTERS PER AMM 29-11-41; R & R B HYD EMDP IAW AMM 29-11-21; R & R B SYS RETURN FILTER IAW AMM 29-11-61; R&R B SYS PRESSURE MODULE FILTER PER AMM 29-11-71.

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