(b)
Make sure that the fasteners have correct grip length, undamaged threads, and undamaged recesses.
NOTE: If any fasteners need to be replaced, it is
____ recommended that K-coated titanium bolts with cadmium plated Cres nut-plates be installed where applicable.
(c)
Remove any excess paint or debris on fastener recesses.
(d)
Lubricate the threads of the fasteners with compound, BMS 3-28.
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(e) Install bolts with a fastener tool and an installation anti cam-out (ACR) driver bit.
NOTE: Use decreased lubricated fastener torques,
____
(AMM 20-51-01/201).
NOTE: A combination removal/installation ACR bit is not
____ recommended. The bit should have a hardness of 56-58 RC.
S 414-040
(5) Do the steps that follow to install the part of the leading edge that contains the bonding jumper:
(a)
Put the lower part of the leading edge in the correct position between BS 2280.2 and LE Sta 77.3.
(b)
Clean the mating surfaces at the bonding jumper with 180-grit abrasive paper.
(c)
Clean the surfaces again with a clean cheesecloth moist with solvent.
(d)
Apply alodine 1000 to the cleaned surfaces (Ref 51-21-04/701).
(e)
Attach the bonding jumper to the leading edge rib forward of BS 2280.2.
(f)
Make sure the resistance between the bonding jumper and the leading edge rib is 0.010 ohms or less (Ref 20-22-01/601).
(g)
Make sure the seal on the dorsal fin is smooth against the leading edge.
(h)
Install the fasteners around this part of the leading edge.
S 434-030
(6) Do the steps that follow to install the part of the leading edge that contains the HF antenna:
(a)
Clean the mating surfaces between the attach plates and the antenna feedlines with 180-grit abrasive paper.
(b)
Clean the surfaces again with a clean cheesecloth moist with solvent.
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MAINTENANCE MANUAL
(c)
Apply alodine 1000 to the cleaned surfaces (Ref 51-21-04/701).
(d)
Put the part of the leading edge that contains the HF antenna in the correct position.
NOTE: While you put it in the correct position, make sure
____ the attach plate is below the antenna feedlines.
(e)
Attach the antenna feedlines to the attach plates (View B, Fig. 401).
(f)
Do a resistance check between the antenna feedline and attach plate (Ref 20-22-01/601).
NOTE: The maximum resistance permitted is 0.0025 ohm.
____
(g) If the resistance between the antenna feedline and attach plate is more than 0.0025 ohm, clean the antenna feedline again.
S 424-018
(7)
Install the splice ribs and the remaining parts of the leading edge one at a time.
S 434-028
(8)
If you install a new part of the leading edge, do the steps that follow:
(a) Cut the edges of the new part of the leading edge skin.
NOTE: Make sure you have the correct clearance between the
____ parts of the leading edge (View A-A, Fig. 401).
(b)
Break the sharp edges of the skin you cut.
(c)
Apply a layer of Alodine 1000 to the cut edges
(Ref 51-21-04/701).
S 224-019
(9) Make sure the fastener heads are smooth with the leading edge skin.
NOTE: The maximum distance below the surface is 0.010 inch.
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