Service difficulty report · O-Ring · Boeing 747123

Difficulty date
May 23, 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
MS9388043
Condition
Leaking
Location
Nr 4 Engine
Stage of operation
CR
Nature of condition
K, J
Precautionary procedure
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 DROPPED TO 0 AND OIL PRESSURE LIGHT CAME ON. SHUT DOWN ENGINE, WINDMILL TIME 22 MINUTES WITH ZERO OIL PRESSURE AND QUANTITY. FOUND PACKING LEAKING AT BOTTOM OF TOWER SHAFT REPLACED PACKING PER M/M 72-61-00 PAGE 1, COMPLIED WITH WINDMILL INSPECTION PER M/M 72-00-00 PAGES 680 O AND P. LEAK CHECK OK PER M/M 71-00-00.