Service difficulty report · Pump · Boeing 7378H4

Difficulty date
February 22, 2025
Submitted
February 24, 2025
Operation
Air carrier
Aircraft
N8683D
Make and model
Boeing 7378H4
Aircraft serial
36738
Aircraft time
30,071 hours, 14,872 cycles
Part
Pump
Condition
Failed
Location
Hyd System
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

SYS A HYDRAULIC LOSS AFTER GEAR RETRACTION<[01] REPLACED #1 ENG CASE DRAIN FILTER AND ?A? ELEC CASE DRAIN FILTER; NO DEBRIS FOUND IN EITHER FILTER. REPLACED#1 ENG DRIVEN HYDRAULIC PUMP IAW AMM 29-11-11. RAN ENGINE TWICE; OPS AND LEAKS CHECKS GOOD. ALSO REF AMM 29-11-41AND 29-11-51 FOR CASE DRAIN FILTERS.

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