SUBTASK 72-00-00-866-081-G00
(5) If you cannot find the source of the unwanted material, do the steps that follow:
(a) Continue to use the engine, and monitor the engine performance.
(b) Clean or replace the fault isolation plugs.
1) Label and save the unwanted material for diagnosis.
(c) Continue to use the engine, if the engine parameters do not show engine problems.
1) Look for increases in engine vibration, EGT, and oil consumption.
(d) Examine the magnetic chip detector, the pump scavenge inlet screens, and the fault
isolation plugs daily or after each flight.
(e) If there are no more signs of engine damage after two consecutive days of engine use,
return to usual engine use.
EXAMPLE: Use a magnifying glass to examine the material on the magnetic chip
detector, pump scavenge inlet screens or fault isolation plugs. Look for bearing spall
material (flakes) This is a sign of bearing failure. Immediately remove the gearbox, the
radial driveshaft or the engine. Also, you must clean the lube system.
(f) You do not need to remove the engine immediately for the unwanted materials that
follow:
1) Labyrinth seal rub strip and coating such as silver plate or Sermetel.
a) Do a spectrographic analysis on the material.
2) Preformed packings, gaskets and omni seals.
SUBTASK 72-00-00-286-133-G00
(6) If the engine has fuel, hydraulic fluid, or other contamination in the oil system, you must correct
the cause of the contamination.
For fuel or oil contamination, refer to the high oil quantity (FIM 71-05-00-1). For other
contamination, refer to the oil system contamination inspection procedure
(TASK 79-00-00-216-026-G00).
SUBTASK 72-00-00-216-140-G00
(7) The indications that follow can show if the engine has fuel contamination in the oil system:
(a) Flight crew indication of an oil level increase during flight (also an oil pressure decrease
and an oil temperature increase).
(b) Cabin crew report of fumes in the cabin during flight.
(c) Fuel smell in the oil tank after flight.
(d) Fuel detection equipment indicates fuel in the oil tank after flight.
N. Foreign Object Damage (FOD) Inspection
SUBTASK 72-00-00-160-001-G00
WARNING
PUT ON EQUIPMENT FOR PROTECTION BEFORE YOU TOUCH THE BIRD
CARCASS, BLOOD, GUTS, AND RESIDUE. THIS CAN CONTAIN BACTERIA
AND VIRUSES THAT CAN CAUSE ILLNESSES, AND INJURIES TO
PERSONNEL.
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-00-00
NoC
Page 663
D633T1B7 Aug 22/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ABX 001-007, 011, 012, 016-019, 021, 022, 025, 101,
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