Instruction Manual

Instructions for Continued Airworthiness 190-01190-11 Rev. 1
for G500H in Robinson R44 Series Rotorcraft Page 19 of 20
2.8 Diagrams
Rotorcraft specific LRU locations and wire routing diagrams are contained in the Garmin Reference
Publications listed in Section 2.1 of this document. Point to point wiring diagrams are in Appendix D of
the G500H STC Installation Manual. Refer to the G500H Post-Installation Checkout Log retained in the
rotorcraft permanent records for a list of the interfaced equipment and port configurations.
2.9 Special Inspection Requirements
2.9.1 Post-Lightning Strike Inspection
In the event of a suspected or actual lightning strike to the aircraft, the GTP 59 OAT Probe and its
associated installation shall be inspected.
The probe and the surrounding installation shall be inspected to ensure that there is no structural
damage around the areas where lightning may have attached. If there is visible sign of damage to the
probe then it must be replaced.
Verify that OAT is displayed on the GDU 620 PFD normally.
2.10 Application of Protective Treatments
Apply Flat Black Imron 373-P-29950 Polyurthane Enamel from Dupont to the glareshield and instrument
panel as required.
Apply any one of the following corrosion protection to the metal brackets as needed:
Epoxy Primer, Chemical and Solvent Resistant Per MIL-P-23377
Alkyd Base One Component Primer, Per Federal Specification TT-P-1757
Chemical Conversion Coating Per MIL-DTL-81706
2.11 Data Relative to Structural Fasteners
Refer to the following table for data on the location, type, and torque values for structural fasteners.
Location
(see section 2.2)
FASTENER TYPE AND TORQUE
6-32 Screw
12-15 inch-pounds
8-32 Screw
12-15 inch-pounds
10-32 Screw
22-25 inch-pounds
NUT, 5/16", HEX, SKIRT
100±20 inch-pounds
Instrument Panel,
Instruments
X X
GDU 620 X
GRS 77H X X
GDC 74H X X
GMU 44 X X
GTP 59 X