Service difficulty report · Duct · Boeing 757351

Difficulty date
June 22, 2024
Submitted
June 26, 2024
Operation
Air carrier
Aircraft
N594NW
Make and model
Boeing 757351
Aircraft serial
32994
Aircraft time
71,672 hours, 23,662 cycles
Part
Duct
Condition
Loose
Location
Rt A/C Pack
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
B, A, G

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

What was found

SHIP 5814 -DIV/PRESS/DE- DUE TO LOSS OF PRESSURIZATION AFTER RIGHT BLEED SHUT OFF PER QRH DUE TO RIGHT BLEED DUCT MESSAGE AND SUBSEQUENTLY LEFT BLEED TRIP. CORRECTIVE ACTION: T/S RT PACK BAY AND FOUND SEVERAL DUCTS LOOSE / LEAKING, REPLACED UPPER DUCT. RPLCD MULTIPLE PERRY SEALS ON COUPLERS, DUCT OFF PACK A/I VLV AND SENSE LINE OFF REHEATER TO ACM. T/S R/R #1 PRSOV, SENSE LINE AND FITTING AND INLET PRESS SENSE LINE @PRSOV. R/R HP VALVE AND HP PILOT. ALL ENG 1 BLEED CKS GOOD.