[3] The lateral arm is measured in terms of the butt line (BL). The centerline of the helicopter is BL0.00.
The moment arms to the left side (looking forward) are negative (-) and the moment arms to the right
side are positive (+).
[4] Location of the 500W Series unit and GPS antenna may vary slightly depending whether or not a
dual navigator system is installed.
2.3 Control, Operating Information
See the Pilot's Guides or the 500W Rotorcraft STC Installation Manual for system operation and self-test
information. The 500W Rotorcraft STC Installation Manual is listed under the reference documentation in
paragraph 2.1 of this document, and the Pilot's Guides are listed in the related documents section of the
500W Rotorcraft STC Installation Manual.
2.4 Servicing Information
None. In the event of system failure, troubleshoot the 500W Series unit in accordance with Section 2.6.
2.5 Periodic Maintenance Instructions
The 500W Series units are designed to detect internal failure. A thorough self-test is executed
automatically upon application of power to the units, and built-in test is continuously executed. Detected
errors are indicated on the equipment via failure annunciations.
Maintenance of the components installed by this STC is on condition, except as noted in the following
table.
Item
Interval
500W Series
12 Months
Unit
500W Series
12 Months
Mounting Rack
500W Series
Instructions for Continued Airworthiness Bell 206B
Table 1 Periodic Maintenance Inspections
Description/Procedure
Conduct a visual inspection (look for signs of wear, deterioration,
or damage to wires, backshells, or connectors) of the 500W
Series unit and wiring harnesses to ensure installation integrity:
1. Inspect the unit for security of attachment.
2. Inspect all knobs and buttons for legibility.
3. Inspect condition of wiring, routing and
attachment/clamping.
4. Inspect related antennas for proper sealing and attachment.
5. Inspect integrity of shield terminations.
6. Inspect for signs of corrosion on equipment, racks and it's
backplates and rack mounting.
Inspect the mounting rack for any signs of excessive wear,
corrosion, or damage. Check mounting rack corners for cracks.
Check integrity of connector plate attachment to the back of
mounting rack. Check the tightness of fasteners attaching
mounting rack to rotorcraft structure and re-torque 12 to 15 in-lbs
if required.
Replace unit mounting rack if any damage has been found.
190-01226-03 Rev. 5
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