20-CONTENTS
BEJ.1 Page 4 Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
NACELLE STRUT COMPONENT CLEARANCES - MAINTENANCE PRACTICES
__________________________________________________________
1. General
_______
A. This procedure has a task to do a check of the strut tube clearances.
B. The task has these parts:
(1)
Remove the strut L/H access doors.
(2)
Remove the strut forward fairing.
(3)
Open the leading edge access panel (6301L strut No. 1; 6401R strut No. 2)
(4)
Examine the strut tubes and wires for proper clearances.
(5)
Close the leading edge fairing access panels.
(6)
Close the strut L/H access doors.
(7)
Install the strut forward fairing.
TASK 20-00-01-202-001
2. Nacelle Strut Component Clearance Check
_______________________________________
A. References
(1)
AMM 27-81-00/201, Leading Edge Flaps and Slats
(2)
AMM 54-31-01/401, Nacelle Strut Access Panels
(3)
AMM 54-32-01/401, Foward Fairings
B. Access
(1) Location Zone
500 Nacelle Strut 1
600 Nacelle Strut 2
C. Prepare to do a check of the strut clearances.
S 862-002
WARNING: INSTALL LEADING EDGE FLAP AND SLAT LOCKS TO PREVENT INADVERTENT
_______ OPERATION OF LEADING EDGE FLAPS AND SLATS. FLAPS AND SLATS ARE FAST ACTING AND CAN CAUSE SERIOUS INJURY TO PERSONNEL.
(1)
Make sure the leading edge flaps and slats are retracted and the lock for the leading edge drive unit is installed (AMM 27-81-00/201)
S 012-003
(2)
Remove the wing/strut intersection panel (6301L or 6401R). (AMM 12-31-71)
S 012-004
(3)
Remove the strut access panels on the left side of the strut (AMM 54-31-01/401).
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20-00-01
ALL ú ú 01 Page 201 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
S 012-005
(4)
Remove the forward strut fairing (AMM 54-32-01/401).
D.
Procedure
S 212-010
(1) Examine clearances of the strut tubes:
NOTE: The supported area of a tube is defined as the section of
____ a tube that is within three inches of a bulkhead nut. The bulkhead nut connects the tube to a rigid piece of equipment.
(a)
Do a check of the clearance between the fuel line and adjacent structure: 1) Make sure the clearance is not less than 0.30 inch at
locations that are not supported.
(b)
Do a check for clearance at locations that are supported:
1) There must be at least 0.10 inch clearance between the tube assembly and adjacent structure. a) The tube is considered supported for 3.0 inches from
the fastener attaching the tube to structure or equipment. 2) Do a check for clearance of at least 0.50 inch between tubes that cross.
3) Do a check for clearance for any tubes that are aligned in parallel. a) The minimum clearance for tube assemblies maintained
parallel by clamp blocks is the distance measurement between the tubes at the clamp block.
S 912-011
(2)
For wire clearances, see the Standard Wiring Practices Manual (SWPM 20-10-11, High Vibration Areas).
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