Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 3-9
3.3.3.2 NAV Antenna Cable Diplexer Installation
The Comant CI-507 diplexer is required to be installed with the NAV antenna coaxial cable wiring in
certain configurations, and it must be installed in accordance with the guidance below. Connecting the
diplexer is installation-dependent. Wire the diplexer as shown in the applicable diagram in Figure E-18.
When determining a proper location to mount the diplexer, use the following guidance:
• Locate the diplexer such that minimal coaxial cable is used in the installation. In general, this will
be as close to the antennas as practical.
• Install the diplexer on a flat surface in the fuselage in a location free from excessive vibration.
• Diplexer installation requires two (2) 10-32 fasteners (torque within 22 to 25 in-lbs). The
following fasteners are recommended:
Stainless Hardware
Name
Part Number
Screw, Pan Head, Stainless
NASM51958, (MS51958), (AN520C)
Washer, .032 thickness
NAS1149C0332R, (AN960C-10L)
Washer, .063 thickness
NAS1149F0363P, (AN960C-10)
Nut, Self-locking Metal, Hex, Thin
NASM21043-3, NAS1291C3, (MS21043-3)
Nut, Self-locking Metal, Hex
NASM21046C3, MS20365C1032C, NAS1021C3,
(MS21046C3), (AN363C1032)
Nutplate, One Lug, Fixed
MS21052, MS21054, MS21072
Nutplate, One Lug, Floating
MS21062
Nutplate, Two Lug, Fixed
MS21048, MS21050, MS21070
Nutplate, Two Lug, Floating
MS21060, MS21076
Nutplate, Corner
MS21056, MS21058, MS21074
Nutplate, Side-by-side
MS21087
Note: Part numbers in parentheses are inactive or cancelled part numbers; these numbers may
still be available and/or referenced on packaging material.
Steel Hardware
Name
Part Number
Screw, Pan Head, Low Carbon Steel
NASM35207, (MS35207), (AN520)
Screw, Pan Head, Alloy Steel
NAS603
Washer, .032 thickness
NAS1149F0332P, (AN960-10L)
Washer, .063 thickness
NAS1149F0363P, (AN960-10)
Nut, Self-locking Metal, Hex, Thin
NASM21042L3, NAS1291-3, (MS21042L3)
Nut, Self-locking Metal, Hex
NASM21045L3, (MS21045L3), (AN363-1032)
Nutplate, One Lug, Fixed
MS21051, MS21053, MS21071
Nutplate, One Lug, Floating
MS21061
Nutplate, Two Lug, Fixed
MS21047, MS21049, MS21069
Nutplate, Two Lug, Floating
MS21059, MS21075
Nutplate, Corner
MS21055, MS21057, MS21073
Nutplate, Side-by-side
MS21086
Note: Part numbers in parentheses are inactive or cancelled part numbers; these numbers may
still be available and/or referenced on packaging material.