(a)
A minimum of five rivets must be correctly installed with no signs of deformation or distress and up to three rivets are permitted to be gone.
(b)
A minimum of four rivets must be correctly installed with no signs of deformation or distress and up to four rivet heads are permitted to be gone.
(c)
A minimum of three rivets must be correctly installed with no signs of deformation or distress and up to five rivets or rivet heads permitted to be gone.
(6)
If the condition of the bearing assembly is less than outlined above, do the inspection again at 920 flight cycle intervals. Continue this inspection until the bearing is reworked or replaced.
(7)
If the condition of the bearing assembly is more than outlined above, rework or replace the bearing assembly per SB32-1217.
548
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-11-11 Page 402A
K12261
Inspection - Forward Trunnion Bearing 548
32-11-11 Figure 401 May 01/99
Page 402B
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
5. Install Main Gear Trunnion Link
A. Clean and lightly lubricate all attachment bolts, pins, and bearing surfaces with grease immediately before installation. Apply BMS 3-28 antiseize compound to the external threads of the forward trunnion bearing assembly and the internal threads of the bearing support fitting.
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 TO BE LUBRICATED. IF YOU APPLY MASTINOX TO TURNABLE JOINTS, FAILURE OF THE LANDING GEAR TO EXTEND OR RETRACT CAN OCCUR.
NOTE: 1. Parts not lubricated with grease after installation must be coated with Mastinox 6856K (Ref 12-21-11/201).
2. Parts and bearing cavity lubricated with grease after installation must be lubricated and filled with Aero Shell 07 (Ref 12-21-11/201).
B. If bearing assembly was removed from trunnion link, proceed as follows:
(1)
Lubricate bearing assembly and fasteners with grease immediately before installation.
(2)
Place bearing assembly (3, Fig. 401) on end of trunnion.
(3)
Install keywasher (1). Make sure keys on trunnion and washer are fully engaged.
(4)
Install trunnion bearing bolt (7). Tighten bolt 5000 to 5500 pound-inches lube torque. Line up a hole in bearing bolt with tapped hole in keywasher (1).
(5)
Install lockbolt (6) through head of bearing bolt and tighten to standard torque.
(6)
Lockwire lockbolt to trunnion bolt.
C. Install hydraulic swivel (23) on trunnion link (20).
D. Raise trunnion link into position with the large lug down.
E. With gear retracted 45 degrees with block and tackle, screw bearing assembly (3) into forward trunnion bearing support fitting (8).
F. Adjust position of gear and swing trunnion link (20) down to pass fork end over shock strut lugs (15).
G. Tap trunnion link down over lugs on shock strut until holes in link and lugs are aligned vertically.
H. Adjust lateral alignment of holes by screwing bearing assembly (3) in or out bearing support fitting (8) until trunnion link (20) and shock strut lug holes (15) are correctly aligned to provide a push fit for trunnion pin (22).
510
Aug 01/94 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-11-11 Page 403
Main Gear Trunnion Link Installation 522
32-11-11 Page 404 Figure 401 (Sheet 1) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/85
F52400
505 Main Gear Trunnion Link Installation
May 01/99 Figure 401 (Sheet 2) BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 32-11-11 Page 405
I. Deleted.
J. Place walking beam arm (13) in position between shock strut lugs (15) with curved lug facing inboard.
K. Install thread protector (21) on trunnion link pin (22). Insert pin through trunnion link (20), shock strut lugs (15) and beam arm (13) from outboard side.
L. Rotate pin (22) to align hole in pin locking lug with lockbolt (16) in trunnion link. Adjust the trunnion bearing so that you can insert the trunnion pin by hand. Remove the thread protector (21).
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