Service difficulty report · Duct · Boeing 767322

Difficulty date
April 6, 2022
Submitted
April 6, 2022
Operation
Air carrier
Aircraft
N656UA
Make and model
Boeing 767322
Aircraft serial
25394
Aircraft time
114,407 hours, 17,855 cycles
Part
Duct
Part number
3500833
Part serial
6456
Condition
Leaking
Location
Bleed Sys
Stage of operation
DE
How discovered
O
Nature of condition
J
Precautionary procedure
B

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

What was found

MULTIPLE MOMENTARY R BLD DUCT LEAK MASTER CAUTIONS IN FLIGHT RE-ACCOMPLISHED TEST 26-18 FAULT TREE 804. TEST FAILED. NEEDS FURTHER TROUBLESHOOTING,, ROTABLE PARTS CHANGE WAS INDICATED - TT # 1345315 SN OFF 2369 IPC REFERENCE # 26-18-52-02 #5 ACCOMPLISHED 26-18 FAULT TREE 804 TEST FAILED. R BLEED DUCT LEAK LIGHT ON BLEED AIR PANEL AND R BLEED DUCT LEAK EICAS MESSAGE FAILED TO APPEAR. REPLACED M691 DUCT LK AND WHEEL WELL FIRE CARD IN P 54 PNL AS PER AMM TASK 26-10-01-024-024 & 26-10-01-424-025. CHECK BETWEEN TS214 AND TS215 ALSO BETWEEN TS215 AND TS216. CHECK IS OKAY. REMOVED PANELS 611CB 611JB 611NB AND 611PB FOR TROUBLESHOOTING UPDATING PARTS INFO REPLACED M691 DUCT LK AND WHEEL WELL FIRE CARD IN P 54 PNL AS REF SSM 26-18-01-102, FOUND WIRE BARELY HANGING FROM D10590 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1345315 SN OFF 6456 PER AMM TASK 26-10-01-024-024 & 26-10-01-424-025. NO FIX. CONNECTOR. JUMPERED FROM WIRE TO TS214 LOOP AND SYSTEM CHECKS CONTINUED FIM 26-18 FAULT TREE 804. CHECKED GROUND ON PIN 30, 7, NORMAL. WILL NEED D10590 CONNECTOR AND 16 AT CONNECTOR D10222. CHECKED OKAY. PERFORMED CONTINUITY CARD, ASSY, DUC OFF 64-2618-9-9001 6456 ON 64-2618-9-9001 0912 REPLACED CONNECTOR D10590 ACP SYSTEM TEST OPS NORMAL.