WING ANTI-ICE TELESCOPING DUCT - INSPECTION/CHECK
TASK 30-11-31-200-801
1. Wing Anti-Ice Telescoping Duct Check
A. General
(1) This procedure has the wear limits for the inner telescoping duct of the anti-ice telescopic
ducts. These ducts are installed on the leading edges for slats 2 through 7.
B. References
Reference Title
27-81-00-080-801 Leading Edge Flap and Slat Locks Removal (P/B 201)
27-81-00-480-801 Leading Edge Flap and Slat Locks Installation (P/B 201)
30-11-31-000-801 Wing Anti-Ice Telescoping Duct Seal Removal (P/B 401)
30-11-31-400-801 Wing Anti-Ice Telescoping Duct Seal Installation (P/B 401)
C. Location Zones
Zone Area
520 Subzone - Left Wing: Leading Edge, Fwd of Front Spar, Outboard of Strut and
Nacelle Gap Cover Area
620 Subzone - Right Wing: Leading Edge, Forward of Front Spar, Outboard of Nacelle
Strut
D. Procedure
SUBTASK 30-11-31-860-009
WARNING
MAKE SURE THAT ALL PERSONNEL AND EQUIPMENT ARE AWAY FROM
THE SLATS. THE SLATS MOVE QUICKLY. INJURIES TO PERSONNEL AND
DAMAGE TO EQUIPMENT CAN OCCUR.
(1) Do this task to extend the leading edge slats and lock them out: Leading Edge Flap and Slat
Locks Installation, TASK 27-81-00-480-801.
SUBTASK 30-11-31-211-001
(2) Examine the inner telescoping duct for wear and use the Table 601 for reference.
Table 601/30-11-31-993-801 WEAR LIMIT CHART
Max allowable wear damage of
coating for Area I
Max allowable wear damage of coating for
Area II
Coating total missing SLAT 4 (5), 10.5 sq inch Unlimited
Coating total missing SLAT 3 (6), 11.0 sq inch Unlimited
Coating total missing SLAT 2 (7), 12.5 sq inch Unlimited
Max length of radial damage 1.00 inch Unlimited
Max length of longitudinal damage Unlimited Unlimited
(a) Only damage to the coating is allowed. Dents or damage to the base metal are not
allowed.
(b) If the damage is more than the wear limits then replace the damaged duct (Wing Anti-Ice
Telescoping Duct Seal Removal, TASK 30-11-31-000-801 and Wing Anti-Ice Telescoping
Duct Seal Installation, TASK 30-11-31-400-801).
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
30-11-31
Page 601
D633A101-ILF Jun 15/2018
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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