Service difficulty report · Pump · Boeing 777222

Difficulty date
December 10, 2023
Submitted
December 13, 2023
Operation
Air carrier
Aircraft
N792UA
Make and model
Boeing 777222
Aircraft serial
26934
Aircraft time
106,095 hours, 14,121 cycles
Part
Pump
Part number
6613303
Part serial
K0236
Condition
Leaking
Location
Hyd System
Part time
806,095 hours, 714,121 cycles
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

L HYD QUANITY DROPPED TO 0 AFTER TAKEOFF FOUND LEFT HYDRAULIC MODULE IN PYLON WITH DISLOGED FILTER BOWL REMOVED LEFT ACMP PRESSURE AND CASE DRAIN FILTER MODULE AS PER AMM 29-11-40. FOUND NO DEBRI OR DPI''S EXTENDED. SWAPPED FITTINGS WITH NEW O RINGS ONTO REPLACEMENT MODULE M&E 76-2911-3-0125. READY TO INSTALL. PARTS USED: 76-2911-3-0125,QTY :1 ADD EMP:U400683 INSTALLED ACMP MODULE IAW AMM 29-11-40. WORK PERFORMED UNTIL STEP K . REQUIRES STEP L TO BE COMPLETE. R/R HYD ELECTRIC DRIVEN PUMP PER AMM 29-11-01 UP TO AND NOT INCLUDED STEP (L) FOR THE LEAK TEST PARTS USED: 1680227,QTY :1 ADD EMP:U400683 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1680227 SN OFF 0236 CORRECTION: R/R HYD ELECTRIC DRIVEN PUMP PER AMM 29-11-01-400-801 UP TO AND INCLUDED STEP (G) 18 , REQUIRE LEAK TEST IPC REFERENCE # 29-11-02 PUMP, HYD ELECT OFF 25-2911-9-0008 0236 ON 25-2911-9-0008 0819 PUMP, HYD ELECT OFF 25-2911-9-0008 0236 ON 0000 COMPLETED INSTALLATION OF #1 ENG. ACMP FROM STEP H TO COMPLETION IAW AMM 29-11-01-400-801 . ALL OPS CKS ARE NORMAL AND NO LEAKS ARE NOTED. OK TO CONTINUE.