Garmin GRA 55 Maintenance Manual - Page 26

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

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Page 26 highlights

Item Visual Inspection of the antennas Description/Procedure Visual inspection on the antenna: 1. Clean the antenna with water and mild soap. 2. Verify there are no cracks on the antenna and around attachment fasteners. 3. Verify that all sealing fillets around the antenna are in good condition. If the antenna is broken, cracked, or dented it must be replaced. Interval To be performed in In the event attachment is not secure, re-attach antenna alignment with Bell and complete the Electrical Bonding Test. 206B, 206L series maintenance In the event the antenna seal shows signs of damage, schedule. Every 100 complete the Electrical Bonding Test and re-seal the flight hours or every antenna. 12 months, whichever comes Visual inspection of the rotorcraft exterior skin around first. installed antenna: 1. Clean the exterior of the aircraft skin within a 10 Perform visual inch radius of the antenna with water and mild inspection in event of soap. suspected lightning 2. Inspect aircraft skin around the antenna footprint to strike. verify there are no cracks and aircraft skin is not deformed. 3. Verify that antenna fasteners are not loose. If the aircraft skin is cracked, or deformed, the internal structure must also be inspected for degradation in the local area. Refer to approved method defined in the Structural Repair Manual For Bell Model 206 Series Helicopters, BHT-206-SRM- 1, Section 3 for applicable repairs. 190-01277-A3 Rev. 1 System Maintenance Manual GRA 55/5500 Bell 206 STC Page 4-6

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190-01277-A3
System Maintenance Manual GRA 55/5500 Bell 206 STC
Rev. 1
Page 4-6
Visual Inspection of
the antennas
Visual inspection on the antenna:
1.
Clean the antenna with water and mild soap.
2.
Verify there are no cracks on the antenna and
around attachment fasteners.
3.
Verify that all sealing fillets around the antenna are
in good condition.
If the antenna is broken, cracked, or dented it must be
replaced.
In the event attachment is not secure, re-attach antenna
and complete the Electrical Bonding Test.
In the event the antenna seal shows signs of damage,
complete the Electrical Bonding Test and re-seal the
antenna.
Visual inspection of the rotorcraft exterior skin around
installed antenna:
1.
Clean the exterior of the aircraft skin within a 10
inch radius of the antenna with water and mild
soap.
2.
Inspect aircraft skin around the antenna footprint to
verify there are no cracks and aircraft skin is not
deformed.
3.
Verify that antenna fasteners are not loose.
If the aircraft skin is cracked, or deformed, the internal
structure must also be inspected for degradation in the
local area. Refer to approved method defined in the
Structural Repair Manual For Bell Model 206 Series
Helicopters, BHT-206-SRM- 1, Section 3 for applicable
repairs.
To be performed in
alignment with Bell
206B, 206L series
maintenance
schedule. Every 100
flight hours or every
12 months,
whichever comes
first.
Perform visual
inspection in event of
suspected lightning
strike.
Item
Description/Procedure
Interval