BENDIXKing KSN 8 Series - Page 145

89000046-014 KSN 780/8XX/900 AeroNav AML STC Installation Manual for Helicopters
Rev 0 Page C-7
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Figure C - 8 Typical GPS Antenna Doubler Installation
Fuselage Skin
Thickness
Adjacent Structure
‡
Rivet Type
Doubler Thickness Outer Rivet Row in
Doubler
Inner Four Rivet in
Doubler
0.016" - 0.025" Dimpled skin /
Countersunk Rivets
0.020" MS20426AD3 (Double
Dimple)
MS20426AD3 (Double
Dimple)
0.016" - 0.025" Protruding Head Rivets 0.020" MS20470AD3 MS20426AD3 (Double
Dimple)
0.032" - 0.050" Countersunk Skin /
Countersunk Rivets
0.032" NAS1097AD4
(Countersunk)
NAS1097AD4
(Countersunk)
0.032" - 0.050" Protruding Head Rivets 0.032" MS20470AD4 NAS1097AD4
(Countersunk)
Table 120 Rivet/ Doubler Selection
‡
Rivet type is dependent on the type of rivets in the adjacent fuselage structure. If the
adjacent rivets in the structure around the bay selected for the doubler installation are
protruding head type, install MS20470AD rivets in the outer row of the doubler. If the
adjacent rivets are countersunk or dimpled, install either MS20426AD or NAS1097AD
rivets per the table above.