Service difficulty report · Shutoff Valve · Boeing 747422

Difficulty date
January 2, 2013
Submitted
February 1, 2013
Operation
Air carrier
Aircraft
N119UA
Make and model
Boeing 747422
Aircraft serial
28812
Aircraft time
57,994 hours, 6,692 cycles
Engine
Pwa PW4056
Part
Shutoff Valve
Part number
79299910
Part serial
9806027
Condition
Faulty
Location
Bleed Air Sys
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

'BLEED 1 OVHT' EICAS STATUS MSG DISPLAYED. BLEED AIR OVERHEAT CAUSING ENGINE 1 PRV AND HPSOV TO BE COMMANDED CLOSED. CREW COMMENTS: EICAS MSG. BLD 1 OVHT-PRV. ACCOMPLISHED QRH PROCEDURE. MSG WENT AWAY. THEN MSG RETURNED. REPLACED NR 1 PYLON PRSOV, 36 11 04 OPS OK NO MESSAGES