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2.7 Removal and Installation Information

If any work has been done on the rotorcraft that could affect the system wiring, antenna cable, or any

interconnected equipment, verify the 500W Series unit power-up self-test sequence is successfully

completed and no failure messages are annunciated.

Whenever removing or installing units, remove power from the LRU by removing rotorcraft power or

opening the LRU circuit breaker.

2.7.1 500W Series Unit

2.7.1.1 Removal

1. Insert a 3/32-inch hex drive tool into the access hole at the bottom of the unit face.

2. Rotate the hex tool counterclockwise until the unit is forced out about 3/8 inches and can be

freely pulled from the rack.

2.7.1.2 Installation

1. Slide the 500W unit in the rack straight in until it stops, about 1 inch short of the final position.

2. Insert the hex drive tool into the access hole at the bottom of the unit face.

3. Rotate the hex tool clockwise while pressing on the left side of the bezel until the unit is firmly

seated in the rack.

The installation configuration and user settings are stored internally in the 500W Series

unit, and will be lost when the 500W Series is replaced with a new unit.

Original 500W Series unit is Reinstalled

If the original 500W Series is reinstalled, then no configuration is required.

New, Repaired or Exchange 500W Series is Installed

If the 500W Series unit is removed for repair and reinstalled, or if the 500W unit is removed and replaced

with a different 500W Series unit, then verify the correct software versions are on the 500W Series unit

as specified in the Equipment List 400W/500W Series Installation Bell 206B STC listed in paragraph 2.1

of this document. In addition, complete the 'Post Installation Configuration & Checkout Procedures'

contained in the 500W Rotorcraft STC Installation Manual listed in paragraph 2.1 of this document to

restore the proper installation configuration settings.

2.7.1.3 Return to Service

After removing and reinstalling the 500W Series unit per the instructions above, verify that the power-up

self-test sequence is successfully completed and no failure messages are annunciated.

Note: There are no special handling requirements for the 500W Series units.

500W Series

Instructions for Continued Airworthiness Bell 206B

NOTE

190-01226-03 Rev. 5

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