Service difficulty report · Bleed Valve · Boeing 767322

Difficulty date
August 28, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N648UA
Make and model
Boeing 767322
Aircraft serial
25285
Engine
Pwa PW4060
Part
Bleed Valve
Part number
1115V0315
Condition
Failed
Location
Nr 1 Engine
Component
Janitrol Aer · 1115V07004
Stage of operation
CL
Nature of condition
M, J
Precautionary procedure
A

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

What was found

NR 1 ENGINE NACELLE OVERHEAT. *S/D* ENGINE 2.95 STABILITY BLEED VALVE WAS OPEN ON TAKEOFF. REPLACED 2.95 STABILITY BLEED VALVE, 2.95 BLEED SOLENOID AND 2.95 BLEED PNEUMATIC RELAY VALVE. SOLENOID AND RELAY VALVES TESTED OK. THE 2.95 BLEED VALVE WAS FOUND LEAKING AT THE PISTON RING SEALS PW75-130, WHICH IS ACCOMPLISHED AT VALVE OVERHAUL IMPROVES VALVE PISTON RING SEALS.