Service difficulty report · Hydraulic System · Boeing 777222

Difficulty date
August 24, 2022
Submitted
August 24, 2022
Operation
Air carrier
Aircraft
N776UA
Make and model
Boeing 777222
Aircraft serial
26937
Aircraft time
97,939 hours, 17,445 cycles
Part
Hydraulic System
Part number
NA
Condition
Leaking
Location
Center Hyd Qty
Stage of operation
CR
How discovered
O
Nature of condition
K
Precautionary procedure
B

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

What was found

CREW REPORTS CENTER HYD QTY DROPPING WITH ASSOCIATED EICAS MESSAGES HYD QTY LOW C & RESERVE BRAKES/STRG. TOMC BILSKI. CENTER HYDRAULIC RESEVOIR READING AT 0.13 REMAINING. LEAK INDICATIONS IN RT MLG WHEEL WELL. PILOTS REPORTED EVERYTHING OPERATED NORMALLY. CODED LOG PAGE AS A SRD. SERVICED CENTER HYD SYSTEM QTY TO .84. OPENED MLG DOOR, OPS AREA OF THE REVESERVOIR IN RH WHEEL WELL IS VERY WET, WITH NO CHECK FLT CONTROLS, FLAPS, BRAKES WITH EDP. CENTER SYS FLUID ACTIVE LEAKS. DROPPED TO .61 WITH NO EVIDENCE OF A ACTIVE LEAK. CONTINUED RUNNING CENTER SYS, THERE WERE NO MORE CHANGE IN HYD QTY. TOP CORRECTION, CODED IT AS SDR. LOG PAGE WAS ACCIDENTALLY CLEARED, GENERATED NEW LOG PAGES. SEE LOG PAGES 9363317 AND 9363340, FOR ALL ADDITIONAL WORK ACCOMPLISHED.