Service difficulty report · Duct · Boeing 777222

Difficulty date
June 21, 2023
Submitted
June 23, 2023
Operation
Air carrier
Aircraft
N779UA
Make and model
Boeing 777222
Aircraft serial
26941
Aircraft time
95,823 hours, 17,599 cycles
Part
Duct
Part number
212W31511
Condition
Blown
Location
Aft Pit Station
Stage of operation
CL
How discovered
O
Nature of condition
B
Precautionary procedure
D

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

What was found

BLEED LOSS BODY EICAS ADVISORY BLEED AIR SUPPLY VALVES ARE LATCHED CLOSED OR THE RESPECTIVE SWI TCHES ARE OFF, SO THAT BLEED AIR IS NOT SUPPLIED TO HYDRAULIC DE MAND PUMPS C1, AND C2, C HYDRAULIC RESERVOIR PRESSURIZATION, AFT CARGO HEAT AND POTABLE WATER TANK PRESSURIZATION. FIM TASK REF : FIM TASK REFERENCE NOT FOUND CMC MSG# 2632082 FLIGHT STATUS: I INTERMITTENCE CODE: I PH: INITIAL CLIMB NARRATIVE: DLODS CONTROL CARD (RIG HT) CMC MSG# 2632081 FLIGHT STATUS: I INTERMITTENCE CODE: I PH: TAKEOFF ROLL NARRATIVE: DLODS CONTROL CARD (LEF T) INITIAL INSPECTION FOUND BLOWN DUCT BETWEEN STATION 1546 AND CREW REPORTS THAT WHEN DUCT BLOWN THERE WAS A LOUD GRINDING STATION 1567.5.DOING RESEARCH FOR PARTS AVAILABILITY. NOISE IN CABIN THEY SUSPECT ACM REPLACED DUCT IN AFT CARGO PERFORME LEAK CHK OPS CHK NML ALL WORK DONE IAW AMM 36-10-00