Service difficulty report · Bleed Valve · Boeing 757222

Difficulty date
January 25, 2011
Submitted
January 26, 2011
Operation
Air carrier
Aircraft
N596UA
Make and model
Boeing 757222
Aircraft serial
28749
Aircraft time
50,682 hours, 14,148 cycles
Engine
Pwa PW2037
Part
Bleed Valve
Part number
32144882
Part serial
234
Condition
Malfunctioned
Location
Nr 1 Engine
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

STARTING RT ENG WITH LT ENG RUNNING LT ENG BLEED VALVE OPENED AND APU BLEED VALVE CLOSED. REPLACED RELAY K10281, NO HELP. REPLACED K10554 TO FIX SIMILAR BLEED FAULT. REPLACED NR 1 ENG PRSOV STARTED RT ENG, LT ENG RUNNING, BOTH ENG BLEED SW IN (OPEN), AND APU BLEED SWITCH IN (OPEN). MOTORED RT ENG TO 28 PERCENT, N2 BEFORE FUEL ON. ALSO ACCOMPLISHED CROSSBLEED START IAW JRH 2-5-1. LT ENG STARTING RT ENG.