(a)
Inspect the 14 tension bolts for damage and replace if required.
(b)
Verify grip lengths for the 14 tension bolts and correlate bolt sizes to bolt installation locations
(c)
Apply a thin coat of BMS3-27 corrosion inhibiting compound to each of the 14 tension bolts, nuts and barrel nuts, and faying surfaces between fastening hardware.
(d)
Verify that each barrel nut is in line with attach holes.
(2)
Support adapter plug close to the outboard end of the wing and install the ground strap. Attach hardware per BAC 5117.
(3)
Position adapter plug against outboard end of wing and install tension hardware with the following sequence of steps:
Special Precaution: Parts are location sensitive. Therefore, it may be necessary to note size, orientation and position of each washer as indicated on the Engineering drawing for reassembly applications. See Figure 404.
(a)
Install the first 10 tension in numbered order until seated.
(b)
Install the first next 4 tension bolts in numbered order until seated.
(c)
Check for gaps along OML periphery (the gap between the adapter plug skins and the wing skins). Maximum allowable gap is .060 inch except at drain hole locations.
(d)
Apply final torque to the first 10 bolts in numbered order.
(e)
Apply final torque to the remaining 4 bolts in numbered order.
Aviation Partners Boeing 757-200 MAINTENANCE MANUAL SUPPLEMENT Part II
Bolt/Nut Description Torque Instruction
7/16 Dia. At locations with barrel nuts Torque bolt heads to: 410 – 510 in-lb
7/16 Dia. At locations without barrel nuts Torque nuts (not bolt heads) to: 450 – 550 in-lb
1/2 Dia. At locations with barrel nuts Torque bolt heads to: 685 – 785 in-lb
1/2 Dia. At locations without barrel nuts Torque nuts (not bolt heads) to: 730 – 830 in-lb
(4)
Connect the two Winglet wiring harness connectors in the LE section of the outboard end of the wing. Access from under wing through access panel opening. See Figure 402.
(5)
Attach the wing LE to the adapter plug edge at WBL 740.00, by installing 23 BACR15GF6D( ) rivets. See Figure 403.
(6)
Aero seal external gaps with BMS5-95 sealant or optional BMS5-142 sealant per BAC5030. Do not apply to removable panels.
(7)
Reinstall access covers. See Figure 401.
(a)
Reinstall adapter plug inspar access panel.
(b)
Reinstall outboard wing inspar access panel.
(c)
Reinstall outboard wing LE access cover.
Aviation Partners Boeing 757-200 MAINTENANCE MANUAL SUPPLEMENT Part II
Adapter Plug
Wing LE Lower Access Panel Wing Inspar Lower Access Panel 544BB 644BB Adapter Plug Inspar Lower Access Panel 546AB 646AB
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