3) The monitor and grit blast operator must be able to signal to each other at all times.
SUBTASK 72-00-00-437-038-G00
(2) Close all the pneumatic bleed valves (PAGEBLOCK 36-11-00/501).
SUBTASK 72-00-00-867-039-G00
(3) Find the fan air scoop, which is at the 2 o'clock position behind the Outlet Guide Vane (OGV).
SUBTASK 72-00-00-957-040-G00
(4) Put blockage material over the fan air scoop to cover it and use masking tape, G02350
[C10-012] to hold the material in place.
SUBTASK 72-00-00-127-041-G00
(5) Sift 25 pounds (11.3 kilograms) of D5OTF7-S1 compound, G00484 through a fine screen.
SUBTASK 72-00-00-127-042-G00
(6) Load the sifted coke into the hopper of the grit blast machine (coke cleaning kit, SPL-6362).
SUBTASK 72-00-00-127-043-G00
WARNING
STAY AWAY FROM THE AREA DIRECTLY OVER THE HOPPER WHILE
COMPRESSED AIR IS APPLIED TO THE REQUIRED PRESSURIZATION. A
SMALL AMOUNT OF GRIT MATERIAL CAN BLOW FROM THE TOP VALVE AS
THE HOPPER SEALS.
(7) Pressurize the hopper to 80 psig (551 KPa).
SUBTASK 72-00-00-757-044-G00
(8) Make sure that all operators are in position (and stable, if needed).
SUBTASK 72-00-00-757-045-G00
(9) Make sure that all equipment is stable.
G. Clean the Engine with Coke.
SUBTASK 72-00-00-867-046-G00
(1) Have the engine control operator do the steps that follow:
WARNING
USE AMM 71-00-00/201 TO OPERATE THE POWER PLANT. IF YOU DO
NOT USE THIS PROCEDURE, YOU CAN CAUSE DAMAGE TO
EQUIPMENT AND INJURY TO PERSONS.
WARNING
DO NOT OPERATE THE ENGINE ABOVE APPROACH IDLE POWER.
INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
(a) Use the Power Plant Operation (Normal) Procedure to operate the engine
(PAGEBLOCK 71-00-00/201).
(b) Keep the engine at approach idle power. Do not move the thrust lever once you start the
procedure to clean.
SUBTASK 72-00-00-947-047-G00
(2) Have the monitor do the steps that follow:
(a) Make sure that the grit blast operator is in position and ready to start.
(b) Make a signal to the grit blast operator to start the procedure.
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-00-00
NoC
Page 717
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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,
109, 114, 115, 314-999
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