SDR 9608146601

Service difficulty report · Bleed Contl Vlv · Boeing 747151

Difficulty date
April 9, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N601US
Make and model
Boeing 747151
Aircraft serial
19778
Engine
Pwa JT9D7A
Part
Bleed Contl Vlv
Condition
Malfunctioned
Location
Nr 4 Engine
Stage of operation
AP
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 APPROACH, THE NR 4 ENGINE STALLED. CREW SHUT DOWN THE ENGINE. WHEN ENGINE WAS RESTARTED, THE NR 4 EGT ROSE TO 760 DEGREES AND THE ENGINE WAS SHUT DOWN FOR THE REMAINDER OF THE FLIGHT. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. REPLACED THE PRESSURE RATIO BLEED CONTROL AND BLEED CONVERTER VALVE, BORESCOPED ENGINE, PERFORMED WINDMILL INSPECTION, AND TRIMMED THE ENGINE. OPERATIONAL CHECK GOOD.