Garmin GRA 55 Maintenance Manual - Page 23

System Maintenance Manual GRA 55/5500 Bell 206 STC, Rev. 1,

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Item Hard Landing Inspection Description/Procedure Interval 1. Complete visual examination of rotorcraft structure (shelf) supporting GRA unit for damage to verify integrity, including unit mounting rack and rack fasteners. Check and re-torque mounting rack fasteners 20 to 25 in-lbs if required. Repair GRA unit support structure in accordance with BHT-206SRM-1 Structural Repair Manual, and BHT-ALLSPM Bell Standard Practices Manual if required. 2. Visually inspect integrity of the GRA unit for damage. Operation of the GRA unit is verified through unit self-test at power-up. On Condition 3. Visually inspect integrity of the GRA antennas, antenna fasteners, and antenna sealant for damage. If required, check and re-torque antenna fasteners 20 to 25 in-lbs, and remove and replace antenna sealant (MIL-A-46146). 4. Inspect all system connectors for FOD and check for bent, broken, or recessed pins. 190-01277-A3 Rev. 1 System Maintenance Manual GRA 55/5500 Bell 206 STC Page 4-3

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190-01277-A3
System Maintenance Manual GRA 55/5500 Bell 206 STC
Rev. 1
Page 4-3
Hard Landing
Inspection
1.
Complete visual examination of rotorcraft structure
(shelf) supporting GRA unit for damage to verify
integrity, including unit mounting rack and rack
fasteners. Check and re-torque mounting rack
fasteners 20 to 25 in-lbs if required. Repair GRA
unit support structure in accordance with BHT-206-
SRM-1 Structural Repair Manual, and BHT-ALL-
SPM Bell Standard Practices Manual if required.
2.
Visually inspect integrity of the GRA unit for
damage. Operation of the GRA unit is verified
through unit self-test at power-up.
3.
Visually inspect integrity of the GRA antennas,
antenna fasteners, and antenna sealant for
damage. If required, check and re-torque antenna
fasteners 20 to 25 in-lbs, and remove and replace
antenna sealant (MIL-A-46146).
4.
Inspect all system connectors for FOD and check
for bent, broken, or recessed pins.
On Condition
Item
Description/Procedure
Interval