Service difficulty report · Pump · Boeing 767424ER

Difficulty date
January 26, 2024
Submitted
January 29, 2024
Operation
Air carrier
Aircraft
N66056
Make and model
Boeing 767424ER
Aircraft serial
29451
Aircraft time
88,816 hours, 12,627 cycles
Part
Pump
Part number
5006003D
Part serial
1921
Condition
Faulted
Location
Fuel Boost
Part time
726,560 hours, 703,768 cycles
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

RIGHT AFT FUEL PUMP FAILED IN FLIGHT DEFECTS NOTED. REF FIM 28-22 FAULT TREE 819. ACCOMPLISHED IDT REQUIREMENTS OF CDCCL BONDING JUMPER SAFETY AND SECURITY. ELECTRICAL BONDING RESISTANCE CHECK WITHIN LIMITS IAW AMM TASK 28-22-03-404-074, AMM TASK 28-22-03-706-014. RIGHT AFT FUEL PUMP. DURING T/S SHOOTING FOUND GFI RELAY K10702 IN P141 PANEL POPPED, R&R RT AFT FUEL BOOST PUMP. REF AMM 28-22-03. OPS AND LEAK IDT BONDING JUMPER INSTALLATION AND BONDING RESISTANCE CHECK REMOVED AND REPLACED GFI RELAY K10702 REF AMM TASK IDT BONDING JUMPER INSTALLATION AND BONDING RESISTANCE CHECKS RESET IT AND OPS CHECKED R AFT PUMP WITH TOTAL FUEL OF 112K CHECKS NOT ACCOMPLISHED AT THIS TIME. PARTS USED: STILL REQUIRED. 28-22-18-400-801. INSPECTION REQUIRED FOR OPS CHECK. STILL REQUIRED.POUNDS FOR 10 MINUTES WITHOUT FAILURE AND NO PRESSURE LIGHT 76-2821-9-9001,QTY :1 ILLUMINATING DURING OPERATION, TESTED MULTIPLE TIMES WITH NO ADD EMP:U383580 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1928071 SN OFF 1921 PUMP, AY-MAIN T OFF 76-2821-9-9001 1921 ON 76-2821-9-9001 0602 PERFORMED OPERATIONAL CHECK OF GFI RELAY K10702 REF AMM TASK 28-22-00-715-696. OPS CHECK GOOD. ACCOMPLISHED IDT REQUIREMENTS OF GFI RELAY K10702.ALI REQUIREMENTS MET IAW AMM TASK 28-22-00-715-696. LEAK AND OPS CK GOOD