SDR EIAA970178

Service difficulty report · Engine · Boeing 747132

Difficulty date: June 22, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N479EV
Make and model: Boeing 747132
Aircraft serial: 19898
Engine: Pwa JT9D7F
System (JASC): 7200 · Engine (Turbine/Turboprop)
Part: Engine
Condition: Failed
Location: Nr 4 Engine
Part time: 80,339 hours
Stage of operation: CR
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

VHHH - LOG PAGE: 04589 - AT CRUISE, FL 290, EXPERIENCED A COMPRESSOR STALL ON THE NR 4 ENGINE. THE ENGINE EGT ROSE TO ABOUT 1000 CELSIUS ACCOMPANIED SIMULTANEOUSLY BY DECREASING N1 AND N2. ENGINE FIRE CHECKLIST WAS ACCOMPLISHED. THE EGT PEAKED AND REMAINED FOR 2-3 SECONDS, NR 4 ENGINE WAS SHUT DOWN. METAL FOUND IN THE TAIL PIPE AND THE 3.5 BLEED VALVE. REMOVED AND REPLACED NR 4 ENGINE. (X)