SDR 9508686622

Service difficulty report · Start Valve · Boeing 747251B

Difficulty date
May 27, 1995
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N622US
Make and model
Boeing 747251B
Aircraft serial
21704
Engine
Pwa JT9D7Q
Part
Start Valve
Condition
Failed
Location
Nr 3 Engine
Component
7265746
Stage of operation
DE
Nature of condition
J
Precautionary procedure
E

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

What was found

DURING DESCENT AT FL240, THE NR 3 ENGINE START VALVE LIGHT ILLUMINATED. THE ENGINE WAS SHUTDOWN AND THE AIRCRAFT CONTINUED TO MSP WHERE AN UNEVENTFUL THREE ENGINE LANDING WAS ACCOMPLISHED. THE START VALVE AND PRESSURE SWITCH WERE REPLACED AND THE SYSTEM OPERATIONALLY CHECKED OK.