Instruction Manual

G500H Flight Display System 190-01150-11 Rev. 2
Instructions for Continued Airworthiness Bell 206A/B Series Page 8 of 19
2.3 Control, Operating Information
See the G500H Pilot’s Guide or the G500H STC Installation Manual, listed under the reference
documentation in paragraph 2.1 of this document, for system operation and self-test information.
2.4 Servicing Information
None. In the event of system failure, troubleshoot the G500H system in accordance with Section 2.6
Troubleshooting Information.
2.5 Periodic Maintenance Instructions
Maintenance of the components installed by this STC is on condition, except as noted in the following
table.
Item Interval Description/Procedure
GRS 77H AHRS 5 years
The GRS 77 utilizes an Earth magnetic field model which is
updated once every five years as part of the Aviation Database
maintained by the owner/operator. If the magnetic model is not
current, the unit will issue an alert upon startup indicating the
model has expired. The model can be updated by inserting an
aviation database card with an updated IGRF model and
powering on the system. A prompt will direct the user to press
ENT to update the model.
GDC 74H ADC On condition
Per Part 43 Appendix E, paragraph (b)(2), the GDC 74H must be
checked using a test procedure equivalent to Part 43 Appendix E,
paragraph (b)(1) with the following exception:
The tests of sub-paragraphs (iv) (Friction) and (vi) (Barometric
Scale Error) are not applicable because the digital outputs of the
GDC 74H are not susceptible to these types of errors.
GDU 620, GRS 77H,
GDC 74H, GMU 44, GTP
59
12 Calendar
Months
Conduct a visual inspection (look for signs of wear, deterioration,
or damage to wires, backshells, or connectors) on units and their
wire harnesses to ensure installation integrity:
1. Gain access to LRU (see General Arrangement Drawing
for LRU locations)
2. Inspect each unit for security of attachment.
3. Inspect all knobs and buttons for legibility.
4. Inspect condition of wiring, routing and
attachment/clamping.
5. Inspect integrity of shield terminations.
6. Inspect for signs of corrosion on equipment and their rack
installations.