190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 6-18
6.9 TVS and Fuse (Nonmetallic Aircraft Only)
This section applies to IFR nonmetallic aircraft only. VFR, nonmetallic aircraft do not require the use of
TVSs or fuses.
Certain nonmetallic aircraft will require TVSs at the main power input of the GTN Xi.
The following materials are used to construct TVS1 and TVS2:
Transient Voltage Suppression Materials
Transient voltage suppressor 30KPA48A (TVS1 and/or TVS2)
Transient voltage suppressor 15KPA48A (TVS1 only)
Fuse, 3AG, fast-acting, 4A Littelfuse, P/N 0312004 (TVS1 assembly)
Fuse, 10A Littelfuse, P/N 0312010 (TVS2 assembly)
Fuse holder, inline, Cooper Bussman, P/N HFB (TVS1 and TVS2)
Connector, 4-pin plug (socket housing) and cap (pin housing) (TVS2)
Tyco electronics P/Ns 1-480424-0 and 1-480426-0 (TVS2)
Sockets, qty. 4, Tyco Electronics, P/N 60617-1 or 60619-1 (TVS2)
Pins, qty. 4, Tyco Electronics, P/N 60618-1 or 60620-1 (TVS2)
Electrical tie-down strap, MS3367-1-X
6.9.1 Fuse
Removal
1. Open the fuse holder and remove the fuse.
Re-installation or Replacement
1. If the fuse continuity checks good, re-install fuse and close the fuse holder. If the fuse is open,
replace the fuse and close the fuse holder.
The fuse for TVS1 is a 3AG fast-acting, 4A Littelfuse (P/N 0312004). The fuse for TVS2 is a 10A
Littelfuse (P/N 0312010).
6.9.2 TVS
The 15KPA48A or the 30KPA48A can be used for TVS1, but only the 30KPA48A can be used for TVS2.
TVS1 Removal
1. Remove the shield block grounding screw and remove the ring terminal from the backshell of the
connector, as shown in Figure 6-10.
2. Open the fuse holder and remove the fuse.
3. Carefully remove heat shrink from the TVS ensuring not to cut the insulation on the wire under the
heat shrink.
4. On the fuse end of the TVS, use a soldering iron to heat the solder joint to remove the TVS.
