(2)
Sealant cutting tool - hardwood or plexiglass
(3)
Varnish brush - 1- or 2-inch
(4)
Spatula
B. Consumable Materials
(1)
A00091 Sealant - silicone rubber 93-006
(2)
B00316 Naphtha - Aliphatic TT-N-95A
(3)
G00001 Parting Agent - Green Strippable Vinyl Coating 4A-183
(4)
G00111 Sheeting, Plastic Film - Mylar, .0075 inch thickness
(5)
G00142 Tape, Masking - Permacel 70
(6)
G00150 Tape, Teflon - Permacel P421
(7)
G00412 Tape, Masking - Permacel 85
C. References
(1)
AMM 27-81-00/MP, Leading Edge Flap and Slat Control System
(2)
AMM 51-31-00/MP, Seals and Sealing
D. Access
(1) Location Zone
303 Left Wing Inboard Leading Edge Including Slats
303 Right Wing Inboard Leading Edge Including Slats
E. Procedure
(1) Do these steps to install existing lens assembly:
(a) Examine the sea on the wing leading edge.
501
33-42-21 Page 404 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 01/95
1) If the seal is damaged replace it as follows: a) Remove old seal and prepare surface for sealing (Ref AMM 51-31-00/201). b) Make new seal (Ref AMM 51-31-00/201).
2) If the seal is not damaged, remove and reapply parting agent or parting tape if required.
(b)
Put lens back into position.
(c)
Install and tighten screws.
(2) Do these steps to prepare a new lens for installation.
(a)
Make a copy of the used lens on a piece of the mylar sheeting. 1) Attach the mylar sheeting to the used lens. 2) Make a mark around the contour of the lens and at the location of each hole. 3) Remove the mylar sheeting from the used lens.
(b)
Make the new lens the same as the used lens. 1) Attach the mylar sheeting to the new lens. 2) Make a copy of the contour and hole locations from the mylar sheeting to the
new lens.
(c)
Drill countersunk holes in the new lens at the correct locations (Fig. 402).
(d)
If it is necessary, cut or grind the edges of the new lens.
NOTE: Make the new lens the same contour and dimensions as the used lens.
(3) On a lens attached with screws and nutplates, install the new lens.
(a)
Remove old seal and prepare surface for sealing (Ref AMM 51-31-00/201).
(b)
Apply the parting tape to all the surfaces that connect on the lens assembly.
NOTE: The parting agent can be used as an alternative to the teflon tape (AMM 51-31-00/MP).
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Aug 01/95 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 33-42-21 Page 405
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Lens Assembly for the Inboard Landing and Runway Turnoff Lights Lens Installation 501 33-42-21 Figure 402 Feb 01/95 Page 406
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(c)
Make a new seal (Ref AMM 51-31-00/201).
(d)
Put the new lens assembly in its position.
(e)
Put the screws that were removed from the used lens assembly into the holes in the new lens assembly.
(f)
Tighten the screws.
(4) On a lens attached with quick-release fasteners, install the new lens.
(a)
Spotface the lens assembly frame at each of the ring retainer locations (Fig. 402).
NOTE: This step is necessary to make sure the lens cover will correctly engage with the leading edge surface. If you do not spotface the lens frame at each hole, do not use the ring retainers.
(b)
Put the studs through the holes in the new lens assembly.
(c)
Attach the ring retainers on the studs (See Fig. 402 for the proper installation procedures).
(d)
Remove old seal and prepare surface for sealing (Ref AMM 51-31-00/201).
(e)
Apply a parting agent to all the surfaces that connect on the lens assembly (AMM 51-31-00/MP).
(f)
Make a new seal (Ref AMM 51-31-00/201).
(g)
Put the new lens assembly in its position.
(h)
Tighten the quick-release fasteners.
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