• In Zone 193: 193AR, 193B, 193CL, 193CR, 193D
• In Zone 195: 195AL, 195BL, 195CL
• In Zone 196: 195AR, 195BR, 195CR
b) Make sure that the maximum resistance for each bonding jumper is not more
than 100 ohms for these access panels:
• In Zone 192: 192CL, 192CR
c) Make sure that the maximum resistance for each bonding fastener is not more
than 10 ohms for these access panels:
• In Zone 193: 193AL
d) Make sure that the maximum resistance for each bonding fastener is not more
than 0.5 ohms for these access panels:
• In Zone 192: 192BL, 192BR, 192E, 192F, 192JL, 192JR, 192K
e) Make sure that the maximum resistance for each bonding fastener is not more
than 0.001 ohms for this access panel:
• In Zone 192: 192G
(c) After you install the bonding fasteners, apply one layer of primer, C00175 to the bonding
fasteners only.
SUBTASK 53-51-21-220-002
(4) Make sure that the distance between panels is in tolerance.
(a) Measure the misfair between the fairing panels.
1) If you install access panels 192CL or 192CR, make sure that the misfair is less than
0.010 in. (0.254 mm).
2) If you install access panels 192DR, make sure that there the misfair is
0.00 ±0.06 in. (0.000 ±1.524 mm).
3) If you install access panels 195AL or 195AR, make sure that the misfair for the
leading edge is between 0.07 in. (1.78 mm) and -0.03 in. (-0.76 mm).
NOTE: The leading edge will be against panel 191AL or 191AR.
4) For all other access panels, make sure that the misfair is less than or equal to
0.04 in. (1.02 mm).
5) 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).
2) If you install 192CL or 192CR, make sure that the clearance between the two sides
of each hinge is less than 0.088 in. (2.235 mm).
3) If you install 192DR, make sure that the clearance is less than 0.10 in. (2.54 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).
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-51-21
Page 417
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
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