Service difficulty report · O-Ring · Boeing 747123

Difficulty date
June 20, 1997
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N858FT
Make and model
Boeing 747123
Aircraft serial
20109
Engine
Pwa JT9D7A
Part
O-Ring
Part number
M832481237
Condition
Pinched
Location
Nr 4 Engine
Stage of operation
CR
Nature of condition
J
Precautionary procedure
A, E

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

What was found

NR 4 ENGINE OIL QUANTITY DECREASED TO ZERO IN FLIGHT, RATE OF DECREASE 1.5 GALLONS PER HOUR. LOW OIL PRESSURE LIGHT ILLUMINATED WITH LOW OIL PRESSURE INDICATED ENGINE SHUT DOWN. REPLACED PINCHED O-RING ON MAIN OIL FILTER HOUSING PER MAINTENANCE MANUAL 72-61-05. LEAK CHECK OK PER MAINTENANCE MANUAL 71-00-00.