Service difficulty report · Hydraulic System · Boeing 767304

Difficulty date
October 1, 2025
Submitted
October 6, 2025
Operation
Air carrier
Aircraft
N391UP
Make and model
Boeing 767304
Aircraft serial
28039
Aircraft time
90,731 hours, 20,150 cycles
Part
Hydraulic System
Part number
15425001
Part serial
787
Condition
Leaking
Stage of operation
CL
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

ATB AFTER TAKEOFF WHILE RETRACTING FLAPS FROM F5 TO F1 WE RECEIVED C HYD QTY ABD STATUS PAGE SHOWED QUANTITY DECREASING #8 SPOILER ACTUATOR REPLACED IAW AMM 26-61-02-401. LEAK CHECK PERFORMED AND NOT FOUND LEAKS. SPOILER OPTS PERFORMED IAW AMM 27-61-00 AND SYSTEM WORKS OK. CENTRAL HYDRAULIC SYSTEM RETURNS FILTERS REPLACED IAW AMM 29-11-16 AND PRESSURE AND CASE FILTERS 29-11-18. CHECKED FOR LEAKS AND FOUND FAULTS.