Boeing 767 - Subtask 72-35-00-848-052-G00; Subtask 72-35-00-848-053-G00; Subtask 72-35-00-328-054-G00; Subtask 72-35-00-848-055-G00

SUBTASK 72-35-00-848-052-G00
(7) Remove the blend tool as follows:
(a) Stop the drive motor.
(b) Put the grind tip in the zero degree position.
(c) Remove the grind tip from the borescope access port.
CAUTION
MAKE SURE THE DRIVE SHAFT HEAD IS IN THE 90 DEGREE POSITION
WHEN YOUR REMOVE OR INSTALL THE TOOL TIP TO THE DRIVE
SHAFT HEAD. IF YOU REMOVE OR INSTALL THE TOOL TIP WITH THE
DRIVE SHAFT HEAD IN THE ZERO DEGREE POSITION, THE DRIVE
BELT WILL DISENGAGE.
(d) Put the grind tip in the 90 degree position.
(e) Remove the grind tip from the drive shaft head.
SUBTASK 72-35-00-848-053-G00
(8) Prepare to polish the blended surface as follows:
(a) Put the polishing ball tip in the drive shaft head.
(b) Put the polishing ball tip in the the zero degree position and insert through the borescope
access port.
(c) Put the drive shaft head to the 90 degree position.
SUBTASK 72-35-00-328-054-G00
(9) Polish the blend repair.
SUBTASK 72-35-00-848-055-G00
(10) Remove the blend tool as follows:
(a) Stop the drive motor.
(b) Put the polishing ball tip in the zero degree position and remove it from the borescope
port.
SUBTASK 72-35-00-218-056-G00
(11) Use the standard borescope probe 1 configuration (magnified 1:1 at 7 inches) to inspect the
blended blades to make sure all the damage has been removed.
SUBTASK 72-35-00-848-057-G00
(12) Do the steps in the task "How to Identify the Zero Degree Point" (PAGEBLOCK 72-00-00/201)
to return the airplane to its usual condition.
(a) Make sure you install the borescope core turning pad cover.
(b) Make sure you tighten the borescope plug to the correct torque value.
(c) Make sure you do the idle leak check.
SUBTASK 72-35-00-978-118-G00
(13) Make a record in the engine records of the HPC blade blend depth and location.
SUBTASK 72-35-00-848-104-G00
(14) If no more work will be done at this time, do the task "Put the Airplane to its Usual Condition".
SUBTASK 72-35-00-218-059-G00
(15) You must inspect the blended area (PAGEBLOCK 72-00-00/601) between 25 cycles and 50
cycles.
(a) If there is no unserviceable damage, no additional follow-up inspections are necessary.
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-35-00
NoC
Page 829
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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