Emergency Frequency Switch/Annunciator; L-3 Avionics (Bf Goodrich) Ps-835(C Or D Model) Emergency Battery; Md 302 Standby Attitude Module (Sam) - Garmin G1000 Nxi System Maintenance Manual

Emergency Frequency Switch/Annunciator

Removal:
1. Remove the switch plate from the pedestal using a screw driver to loosen the quarter
turn fasteners.
2. Using a M22885/108T8234 extraction tool, disconnect connector from the back of the
switch.
3. Pull the pushbutton cap fully out of the switch body and allow the cap to rotate 90° where
it is held by the retaining element.
4. While holding the retaining sleeve (back side of the switch plate), loosen the two screws
inside the switch body until the switch is free to come out.
5. Remove the mounting sleeve and switch from the switch plate.
Reinstallation:
1. Reinstallation of the Emergency Frequency switch/annunciator is the reverse of the
removal. Reference the Pedestal Re-Configuration drawing, listed in Table 1-1, for more
details.
2. Press and hold the cockpit annunciator "Press To Test" switch located to the left of the
annunciator panel, and verify the following:
• Legends illuminate and reflect "EMERG FREQ" in white and "121.5" in white.
3. Release cockpit annunciator "Press To Test" switch.
4. If further maintenance is not required, proceed to Section 9.

L-3 Avionics (BF Goodrich) PS-835(C or D Model) Emergency Battery

Removal:
1. Gain access to the forward avionics compartment in the nose of the aircraft.
2. Unscrew the knurled hold-down nut to allow it to move free of the unit.
3. Remove the unit from the rack.
Reinstallation:
1. Install the emergency battery in accordance with the Electrical Equipment Install, Nose
Bay drawing (refer to Master Drawing List, listed in Table 1-1, for specific drawing
number). Refer to the King Air 300 Series Maintenance Manual, listed in Table 1-1, for
access requirements as needed.
2. If further maintenance is not required, proceed to Section 9.

MD 302 Standby Attitude Module (SAM)

The MD 302 SAM installed by this STC has two components, an electronic indicator, and a
configuration module. The indicator is installed on the instrument panel, between the pilot's
PFD and the MFD. The configuration module in installed inside the 15-pin D-subminiature
connector that mates to the back of electronic indicator. It is required for proper operation of the
unit.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Page 248
Revision 1