SDR 9702476612

Service difficulty report · Compressor · Boeing 747251B

Difficulty date
February 4, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N612US
Make and model
Boeing 747251B
Aircraft serial
20357
Engine
Pwa JT9D7F
Part
Compressor
Condition
Stalled
Location
Nr 1 Engine
Stage of operation
DE
Nature of condition
R
Precautionary procedure
E

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

What was found

DURING TOP OF DESCENT AT 37,000 FEET, NR 1 ENGINE EXPERIENCED A COMPRESSOR STALL FOLLOWED BY A RISE IN EGT. NR 1 ENGINE WAS SHUT DOWN AND SUCCESSFULLY RESTARTED AT 20,000 FEET. MAINTENANCE PERFORMED TYPE 'A' STALL INSPECTION CHECK PER FIM 71-01-00. REMOVED AND REPLACED PRESSURE RATIO BLEED CONTROL AND PS4 RESTRICTOR.