Apr/2006 - Honeywell KHF 1050 System Installation Manual

the KAC 1052 mounting tray and mounting shelf. The shield of the coax also
contributes to the overall bond of the KAC 1052 to the airframe.
6.A.(2) Bonding Strap Considerations
Make bonding straps as short as practical and installed in such a manner that
the resistance of each connection does not exceed 3 milliohms. The straps
must not interfere with moveable aircraft elements, such as surface controls,
nor should the movements of these elements result in damage to the bonding
straps.
The bonding strap should be made of a solid conductive material rather than
braid. Strap thickness should be 0.010 inches or greater. A one inch wide silver
plated copper strap, available from Honeywell, is recommended. P/N
047-06261-0036 is a 36 inch length of the strap. This strap can be cut to length
and punched as necessary.
6.A.(3) Bonding Connection and Corrosion Prevention Techniques
Because the mounting surfaces are an important part of the ground system,
bonding between these surfaces requires special attention.
NOTE: All nonconductive finishes such as primer, paint, anodizing films, or
zinc chromate, must be totally removed from the entire mating surface
before assembly. Techniques such as spot-facing or cleaning only
small area of the mating surfaces do not provide adequate RF bonding.
Ground strap connections must be totally free of any non-conductive finishes.
Corrosion resistance for aluminum mating surfaces should be achieved by
cleaning the aluminum surfaces with Alumiprep #33 (P/N 016-01127-0000),
and then applying Alodine #1001 (P/N 016-01128-0000). Alodine #1001 (as
well as Alodine #600) provides good electrical conductivity, other Alodine
coatings should be avoided.
Only after the shelves are assembled and mounted, and ground straps
installed, may nonconductive or poorly conductive protective finishes, such as
zinc chromate be applied. Periodic inspection should be made of all bonds to
ensure that corrosion is not occurring. Any observed corrosion should be
cleaned off.
Revison 2
N
KHF 1050 SYSTEM INSTALLATION MANUAL
23-10-09
Page 2040

Apr/2006