SDR EIA990286

Service difficulty report · Engine · Boeing 747131

Difficulty date
October 15, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N472EV
Make and model
Boeing 747131
Aircraft serial
20320
Engine
Pwa JT9D7AH
Part
Engine
Condition
Bird Strike
Location
Nr 1
Stage of operation
CL
Nature of condition
C
Precautionary procedure
O

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

What was found

HNL - NR 1 ENGINE 'N1' INDICATOR HAD INTERMITTENT FLUCT PLUS/MINUS 5 PERCENT ON CLIMB-OUT. FLUCT AT CRUISE PEGGED OVERSPEED INDICE AT 112 PERCENT. RESET INDICE AND INDICATOR OPERATED NORMALLY FOR REMAINDER OF FLT. ON POST FLT, FOUND 'C1' DISC AND '1'STATOR' GUIDE VANES DAMAGED FROM APPARENT BIRD STRIKE. PERFORMED BIRD STRIKE INSPECTION PER MM 72-00-00. FOUND 4 BLADES DAMAGED AND 7 EXIT VANES DAMAGED. REMOVED AND REPLACED 8 FAN BLADES PER WORK CARD F7208. BOROSCOPE ACCOMPLISHED PER MM 72-00-00. REPLACED BLADES NR 45, 22, 23, 1, 24, 2, AND 25. RAN ENGINE AT PART POWR PER MM 71-00-00. ALL PARAMETERS CHECKED NORMAL. (M)