(e)
Examine the sealant for holes, bubbles, or spaces.
1) If there are holes, bubbles, or spaces, do the procedure again.
(f)
If it is necessary, do this Task: Application of Corrosion Resistant Finish (Topcoat) (AMM 28-11-00/701).
NOTE: A layer of corrosion resistant finish is necessary
____ only to protect bare (anodized) metal. It is not necessary to apply a layer of corrosion resistant finish on sealant. Corrosion resistant finish can be applied on sealant, but it is not necessary. Usually topcoat is applied to sealant only when it must be applied to protect adjacent bare metal.
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(7) Apply an injection seal, if it is necessary.
NOTE: As an alternative procedure, you can lift the seal plane
____
to isolate the bad seal from the fuel.
(a) Make sure you have these tools:
1) Pipe cleaners
LOCKBOLT BOLT
NOTE: ALL DIMENSIONS ARE IN INCHES.
Dimensions of Fillet Seals (Inches) for Fasteners Figure 808
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2) A sealant fairing tool
3) A sealant gun with an injection nozzle attached.
(b)
Make sure the channel is fully clean.
(c)
Apply a precoat of BMS 5-26, Type II, Class A-2 sealant to the channel surfaces with pipe cleaners or a long, bristled brush.
NOTE: If the channel width is 0.07 inch or less, it is not
____
necessary to apply the precoat.
1) Make sure you do not seal the channel with the precoat of BMS 5-26, Type II, Class A-2 sealant. 2) If you seal the channel, it will prevent the flow of the sealant into the channel.
(d)
Put BMS 5-26, Type II, Class B sealant into one end of the channel (Fig. 809).
(e)
Fill the channel until the sealant comes out of all other openings.
(f)
Fill all slots, joggles, and channels where continuity of a seal or a block-off seal is necessary.
CAUTION: MAKE SURE THERE IS A SUFFICIENT QUANTITY OF SEALANT IN THE
_______ SEALANT GUN FOR A FULL SEAL. IF YOU STOP AND START WHEN YOU APPLY THE SEAL, AIR BUBBLES CAN GET INTO THE SEAL AND IT WILL NOT BOND CORRECTLY.
(g)
Slowly and continuously move the sealant into the area where you apply a fillet seal.
(h)
Remove the unwanted sealant with the sealant fairing tool.
(i)
Examine the seal for an incorrect bond and for air bubbles.
1) If the seal has an incorrect bond or air bubbles, do the procedure again.
(j)
If it is necessary, do this Task: Application of Corrosion Resistant Finish (Topcoat) (AMM 28-11-00/701).
NOTE: A layer of corrosion resistant finish is necessary
____ only to protect bare (anodized) metal. It is not necessary to apply a layer of corrosion resistant finish on sealant. Corrosion resistant finish can be applied on sealant, but it is not necessary. Usually topcoat is applied to sealant only when it must be applied to protect adjacent bare metal.
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(8) Apply a prepack seal, if it is necessary.
NOTE: As an alternative procedure, you can lift the seal plane
____ to isolate the seal with the leak from the fuel (Fig. 812).
(a) Apply a layer of BMS 5-26, Type II, Class B sealant to one of the parts (Fig. 810).
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(b) Use a sealant fairing tool to move the sealant to put it into
the shape of the empty space.
(c) Make sure you apply a sufficient quantity of sealant to fill
the empty space fully.
(d) Assemble the parts in the applicable sealant usable time
(Fig. 801).
(e) If it is necessary, do this Task: Application of Corrosion
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