If the Trimpack receiver is removed from the aircraft and operated on its internal batteries,
the external power connector cap must be reinstalled.
13. Kit B Removal Procedure.
a. Remove GPS antenna from its mount and disconnect GPS antenna cable.
b. Connect GPS antenna cable to antenna blankoff panel and install blankoff panel on GPS antenna mount. Secure
blankoff panel to mount using screws and washers.
c. Remove Trimpack receiver from its mount on copilots pedestal and disconnect antenna cable and power cable. Install
caps on Trimpack receiver connectors.
14. Kit A Removal Procedures.
To prepare helicopter for safe ground maintenance battery must be disconnected.
a. Prepare the aircraft for safe ground maintenance (TM 55-1520-210-23).
b. Open nose compartment door.
c. Gain access to overhead console circuit breaker breakers and wiring.
d. Remove upper cabin sound proofing blanket as required to gain access to wire bundles and GPS antenna cable routing.
e. Remove Windshield center post cover and gain access for wire routing behind main instrument panel.
f. Remove the following components from copilots pedestal for access to install GPS provisions (refer to TM 55-1520-
Blank panel between VHF Control (ARC-134) and UHF Control (ARC-51).
g. Remove 90209215-3 and -4 Trimpack remote antenna mounts from upper wire strike cutter.
(1) Disconnect antenna cable from blankoff panel and remove blankoff panel from antenna mount. Remove upper an-
(2) Remove left and right antenna mounts from upper wire strike cutter.
h. Remove aircraft wiring for Trimpack GPS.