Service difficulty report · Engine · Boeing 747122

Difficulty date
September 18, 1998
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N852FT
Make and model
Boeing 747122
Aircraft serial
19757
Engine
Pwa JT9D7A
Part
Engine
Condition
Failed
Location
Nr 4 Engine
Stage of operation
CR
Nature of condition
M
Precautionary procedure
A, E

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

What was found

AT FL 330 NR 4 ENGINE STALLED WITH AN AUDIBLE SOUND AND WENT TO A OVER TEMP OF 950Ý FOR 3-4 SECONDS. ENGINE WAS THEN SHUT DOWN, PER CHECK LIST. RELIGHT WAS ATTEMPED AT FL 240 BUT THE EGT WAS MUCH HIGHER AS ENGINE STARTED TO ACCELERATE. THE ENGINE WAS SHUT DOWN. FOUND METAL IN TAIL PIPE. ENGINE WAS CHANGED PER POLAR WORK CARD M7100-002 AND RUN PER M7100-O11.