(2)
Remove bearing.
(3)
If loose or damaged, remove seal.
3. Install Outboard Midflap Carriage
A. If existing bushings and bolts are to be used, check allowable wear (Ref 27-51-81)
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Feb 01/95 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-51-81 Page 401
G18139E69377
Outboard Midflap Carriage Installation 533
27-51-81 Figure 401 (Sheet 1) Aug 15/73
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
533 Outboard Midflap Carriage Installation
Feb 01/95 Figure 401 (Sheet 2) 27-51-81
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
B. Check for coating of sealant per View 3, Fig. 401. If required, apply sealant as follows:
(1)
Apply BMS 5-95 sealant per view 3 with a minimum thickness equal to bearing sleeve
(0.030 inch).
(2)
Allow sealant to cure.
(3)
Apply primer and teflon filled coating over sealant and spindle. B1. Check and adjust side rollers as follows:
(1)
Check that two bolts through each mounting bracket are tight.
(2)
Check that shims under roller mounting bracket and opposite bracket are equal thickness.
(3)
Check that dimension between side rollers is 1.340 to 1.350 inches.
(4)
If dimension between side rollers is not correct, add or remove shim laminations under side roller mounting bracket to obtain correct dimension. Install bare shims with wet or dry primer. Maintain equal shim thickness under roller bracket on opposite side of carriage.
(5)
If bolts were removed, install bolts with wet primer and tighten and lockwire boltheads together.
C.
If a new spherical bearing is being installed:
(1)
Install bearing on carriage with boltholes aligned.
(2)
Line ream bolthole 0.312 to 0.313 inch.
(3)
Remove bearing from carriage.
(4)
Coat bearing with corrosion preventive compound.
(5)
Apply BMS 3-27 (Mastinox 6856K) between the carriage support fitting and the outer race of spherical bearing.
WARNING: USE NITRILE GLOVES FOR SKIN PROTECTION AGAINST BMS 3-27 (MASTINOX 6856K). IF MASTINOX GETS ON YOUR SKIN, IMMEDIATELY REMOVE IT WITH WATER. IF THIS MATERIAL GETS IN YOUR EYES, IMMEDIATELY FLUSH YOUR EYES WITH WATER AND GET MEDICAL AID. THIS MATERIAL CONTAINS VERY POISONOUS AND FLAMMABLE AGENTS WHICH CAN CAUSE INJURIES TO PERSONS.
CAUTION: REMOVE UNWANTED MASTINOX FROM SURFACES WHICH WILL BE LUBRICATED AND FROM SURFACES THAT MOVE. YOU CAN CAUSE FAILURE OF MOVING PARTS IF YOU APPLY MASTINOX TO SURFACES THAT MOVE.
NOTE: Apply Mastinox at WBL 254 and WBL 355 on the outboard flap (Ref 27-51-44).
(6)
Install bearing in midflap.
(7)
If removed, apply a thin coat of BMS 5-95 sealant to seal and locate on midflap.
(8)
Locate bearing retainer. Install four bolts with boltheads forward. Tighten nuts 80 to 100 pound-inches.
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27-51-81 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 01/95
D. Completely coat flap carriage with corrosion preventive compound in area contacting spherical bearing and insert flap carriage aft through spherical bearing (Fig. 401).
E. Coat special bolt with primer and install countersunk washer under bolthead.
F. Install special bolt with wet primer through flap carriage and spherical bearing with head on inboard side.
G. Install washers and nut on bolt and tighten nut 60 to 85 pound-inches.
H. Apply fillet of BMS 5-95 sealant around bolthead, countersunk washer, nut, washers, and spherical bearing.
I. Apply MIL-G-21164 grease liberally around slotted hole and on bearing periphery at aft end of carriage spindle.
J. If removed, position carriage bearing support over end of flap carriage with ships installed between carriage bearing support and midflap forging. Install bolts and position shims, retainer, radius fillers, washers and nuts (Fig. 401). Tighten 3/8-inch nut to 160-190 pound-inches and tighten 5/16-inch nut to 100-140 pound-inches.
NOTE: Shim thickness should be identical with shim removed in step 2.E.
K. Deleted.
L. Install bolt through safety link, bushing and flap carriage. Secure with radius filler and nut. Install cotter pin.
M. Install outboard trailing edge flap (Ref 27-51-72 R/I).
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