Service difficulty report · Pilot Valve · 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
Pilot Valve
Part number
33990047
Part serial
414C
Condition
Failed
Location
Lt Bleed
Part time
88,576 hours, 40,338 cycles
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

SHIP 5814 - LOSS OF PRESSURIZATION AFTER RIGHT BLEED SHUT OFF PER QRH DUE TO RIGHT BLEED DUCT MESSAGE AND SUBSEQUENTLY LT BLEED TRIP. CORRECTIVE ACTION: T/S #1 R/R PRSOV, SENSE LINE AND FITTING AND INLET PRESS SENSE LINE @PRSOV. R/R HP VALVE AND HP PILOT. ALL ENG 1 BLEED CKS GOOD. (6140337)