SUBTASK 72-40-00-216-002-G00
(1) Visually examine the outer forward flange for the conditions that follow:
Condition Maximum Serviceable Limits
Weld cracks in the axial direction Permitted if less than 0.06 inch (1.5 mm) in length. There must be at
least 0.50 inch (13mm) between each crack.
Weld cracks in the transverse direction Permitted if less than 0.10 inch (2.5 mm) in length. There must be at
least 0.50 inch (13mm) between each crack.
Bolt hole radial cracks Not serviceable. See the over serviceable limit extensions (Ref
72-00-00).
SUBTASK 72-40-00-216-003-G00
(2) Visually examine the outer rear flange for the conditions that follow:
Condition Maximum Serviceable Limits
Weld cracks in the axial direction Permitted if less than 0.06 inch (1.5 mm) in length.
Weld cracks in the transverse direction Permitted if less than 0.10 inch (2.5 mm) in length.
Radial cracks in the bolt holes Permitted in the outer direction only. Cracks in the inner direction
toward the casing are not permitted, One crack is permitted in each
bolt hole, and four in each flange.
Loose bolts Not serviceable. Remove the bolts. Inspect the flange. If the flange is
serviceable, install the bolts. Apply pure nickel special compound,
D50017 [C02-071]. Tighten the bolts to 200-210 pound-inches
(22.6-23.7 newton meters).
Wear and fretting Permitted, if less than 0.010 inch (0.25 mm) of wear. There must be a
minimum flange thickness of 0.115 inch (2.92 mm).
Pitting Permitted, if there is a flange thickness of at least 0.090 inch (2.29
mm).
Wear below the loose bolts (the bolts have been
removed)
Permitted, if the bolt head completely covers the hole. A maximum of
two adjacent holes with wear are permitted.
Nicks, scores and scratches Permitted, if less than 0.03 inch (0.8 mm) in depth (after the high
metal has been removed). The damage must not go across more than
75% of the flange seal surface.
SUBTASK 72-40-00-216-004-G00
(3) Visually examine the mid rings on the frame outer case for the conditions that follow:
Condition Maximum Serviceable Limits
Cracks Not serviceable if in the skin.
Fretting Permitted if 70% of the tee section has frets that are less than 0.01 inch (0.3 mm) in
depth. 20% of the tee section can have frets that are less than 0.03 inch (0.8 mm) in
depth.
SUBTASK 72-40-00-216-018-G00
CAUTION
IF YOU FIND HOT SPOTS OR BULGES, YOU MUST DO THE COMBUSTOR
BORESCOPE INSPECTION (PAGEBLOCK 72-00-00/601). HOT SPOTS AND
BULGES ARE SIGNS THAT THE COMBUSTION LINER IS DAMAGED.
(4) Visually examine the outer case for the conditions that follow:
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-40-00
NoC
Page 602
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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