Instruction Manual

G500H Flight Display System 190-01150-21 Rev. 2

Instructions for Continued Airworthiness Bell 407 Page 7 of 19

The installed G500H equipment can be accessed as described below:

1. GDU 620: FS38.0, WL 46.0 Access or remove by removing the six screws in the bezel of the

GDU 620.

2. GDC 74H: FS27.7, WL 40.1 Access or remove by lowering instrument console at its hinge

point and removing the top instrument console cowling.

3. GRS 77H: FS57.0, WL22.0 (Secondary location) Access or remove by removing the cushion

from the co-pilots seat and the panel on top of the seat pedestal.

4. GRS 77H: FS174.5, WL59.4 (Primary location) Access or remove by opening the baggage

compartment and removing the access panel located on the ceiling of the baggage

compartment.

5. GMU 44: FS243.0, WL70.1 (Secondary location) Access or remove by removing the bolts

from the access panel on the pilots side of the aircraft at the juncture of the tail boom and

fuselage.

6. GMU 44: FS316.5, WL74.3 (Primary location) Access or remove by removing the bolts from

the access panel on either side of the aircraft at the juncture of the horizontal stabilizer and

tail boom.

2.2.1 Weight and Balance Information

WeightandBalanceBell407 Momentarm(IN) Location

Item PartNumber Weight(LB) Longitudinal Lateral Primary Secondary

1 011‐01264‐50 GDU620(UnitOnly) 6.38

38.0 6.0

GDU620(Installedwithrackandconnector) 7.04

2 011‐00882‐11 GDC74H(UnitOnly) 1.70

27.7 4.0

GDC74H(Installedwithconnector) 1.92

3 011‐00868‐20 GRS77H(UnitOnl y) 2.80



GRS77H(Installedwithrackandconnector) 3.46

4 011‐00870‐10 GMU44(UnitOnly) 0.35 316.5 0.0 

GMU44(Installedwithrackandconnector) 0.50 316.5 0.0



GMU44(UnitOnly) 0.35 243.0  

GMU44(Installedwithrackandconnector) 0.50 243.0  

[1] A rotorcraft weight and balance is required after installation of the G500H system. Refer to STC

installation manual P/N 190-01150-06 for additional information, including overall size and center of

gravity location of all LRUs.

[2] The longitudinal arm is measured in terms of the fuselage station (FS) number.

[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 (+).