FAN FRAME - INSPECTION/CHECK
1. General
A. This procedure gives the instructions to examine the forward fan case, aft fan case, and aft fan
frame.
TASK 72-33-04-206-001-G00
2. Examine the Forward Fan Case
A. References
Reference Title
71-11-04 P/B 201 FAN COWL PANELS - MAINTENANCE PRACTICES
(OPEN/CLOSE)
72-00-00 P/B 601 ENGINE - INSPECTION/CHECK
72-33-04 P/B 801 FAN FRAME - REPAIRS
78-31-00 P/B 201 THRUST REVERSER SYSTEM - MAINTENANCE PRACTICES
B. Location Zones
Zone Area
410 Left Powerplant
420 Right Powerplant
C. Procedure
SUBTASK 72-33-04-016-002-G00
(1) Open the fan cowl panels (PAGEBLOCK 71-11-04/201).
SUBTASK 72-33-04-216-003-G00
CAUTION
MAKE SURE THAT OBJECTS DO NOT FALL THROUGH THE OPEN VALVES
INTO THE ENGINE. DAMAGE TO THE ENGINE CAN OCCUR.
(2) Examine the forward fan case for the conditions that follow (Figure 601):
CONDITION MAXIMUM SERVICEABLE LIMIT
Cracks One in ten bolt holes are permitted to have one crack, if it is less than 0.030 inch
(7.6 mm) in length. No cracks are permitted in any other areas.
Nicks and scratches Permitted, if they are less than 0.10 inch (2.5 mm) in depth (after the high metal
has been removed). There must be more than 1.0 inch (25.4 mm) between each
nick and scratch.
Dents Permitted, if they are smooth and less than 0.20 inch (5.00 mm) in depth.
Loose rivets and nuts Not permitted. Tighten the loose rivets and nuts. Replace the rivets and nuts that
are gone.
767
AIRCRAFT MAINTENANCE MANUAL
CF6-80A SERIES ENGINES
72-33-04
NoC
Page 601
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ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details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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