(b) Install the three P06 balance screws.
1) Tighten the screws to 50-75 pound-inches (5.6-8.4 newton meters).
SUBTASK 72-31-00-945-032-G00
(3) Remove the protective mats from the internal inlet cowl.
SUBTASK 72-31-00-865-050-G00
(4) Do the steps in the Operate the Engine paragraph.
NOTE: Operate the engine at the same N1 speed (rpm) that was used for the initial engine
run.
SUBTASK 72-31-00-945-033-G00
(5) Put protective mats, STD-6378 (3 required) on the bottom half of the internal inlet cowl.
SUBTASK 72-31-00-035-051-G00
(6) Remove the three P06 balance screws from the selection number 1 locations.
SUBTASK 72-31-00-435-052-G00
(7) Install the initial screws that were replaced by the three P06 screws.
(a) Tighten the screws to 50-75 pound-inches (5.6-8.4 newton meters).
H. Imbalance correction number 2
SUBTASK 72-31-00-435-062-G00
(1) Do the steps that follow to install the Wt balance screws for selection number 2.
NOTE: In the example, spinner hole locations 25, 26, and 27 are used.
(a) Remove the initial balance screws from the selection number 2 spinner hole locations.
1) Make a record of the location of each of the screws that you remove.
2) Keep the screws because you will need to put them back in the same location.
(b) Install the three P06 balance screws.
1) Tighten the screws to 50-75 pound-inches (5.6-8.4 newton meters).
SUBTASK 72-31-00-945-028-G00
(2) Remove the protective mats from the internal inlet cowl.
SUBTASK 72-31-00-865-063-G00
(3) Do the steps in the Operate the Engine paragraph.
NOTE: Operate the engine at the same N1 speed (rpm) that was used for the initial engine
run.
SUBTASK 72-31-00-945-023-G00
(4) Put protective mats, STD-6378 (3 required) on the bottom half of the internal inlet cowl.
SUBTASK 72-31-00-035-064-G00
(5) Remove the three P06 balance screws from the selection number 2 locations.
SUBTASK 72-31-00-435-065-G00
(6) Install the initial screws that were replaced by the three P06 screws.
(a) Tighten the screws to 50-75 pound-inches (5.6-8.4 newton meters).
I. Imbalance correction number 3
SUBTASK 72-31-00-435-066-G00
(1) Do the steps that follow to install the Wt balance screws for selection number 3.
NOTE: In the example, spinner hole locations 38, 1, and 2 are used.
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-31-00
NoC
Page 522
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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