SUBTASK 53-51-21-220-003
(3) Make sure that the distance between panels is in tolerance.
(a) Measure the misfair between the fairing panels.
1) If you install Access Panel, 191BL [6] or Access Panel, 191BR [2], make sure that
there is no misfair between the panels and the adjacent panels.
NOTE: These panels make a recess for the Ram Air inlet.
2) If you install Access Panel, 191AL [7] or Access Panel, 191AR [1], make sure that
the misfair for the trailing edge is between 0.07 in. (1.78 mm) and -0.03 in.
(-0.76 mm).
NOTE: The trailing edge will be against panel 195AL or 195AR.
3) For all other access panels, make sure that the misfair is less than or equal to
0.04 in. (1.02 mm).
4) If necessary, install shims to the forward panels at fastener locations, no more than
0.040 in. (1.016 mm), bonded to the structure with sealant, A00247.
NOTE: Reducing the positive step will reduce erosion of the access panels.
(b) Measure the clearance between the fairing panels.
1) Make sure that the clearance between the panels is 0.14 in. (3.56 mm)±0.060 in.
(1.524 mm).
(c) Measure the flushness between the fasteners and the fairing panels.
1) Make sure that the distance between the fasteners and panels is between 0.005 in.
(0.127 mm) and -0.010 in. (-0.254 mm).
SUBTASK 53-51-21-390-007
(4) Apply sealant, A02315, to make a fillet seal where the panel touches the fuselage.
NOTE: This makes an aerodynamic and weather seal.
(a) Do not apply sealant on the access doors.
H. Put the Airplane in Its Usual Condition
SUBTASK 53-51-21-410-005
(1) Connect or install the equipment to the fairing.
SUBTASK 53-51-21-410-003
(2) Do an operational test for the disconnected or removed equipment.
(a) Ram Air Intake (SECTION 21-51)
(b) Lights (SECTION 33-44)
END OF TASK
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-51-21
Page 407
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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