Garmin GTN6XX Benutzerhandbuch

190-01007-A1

System Maintenance Manual GTN 6XX/7XX Part 23 AML STC

Rev. 7

Page 6-26

The following steps are provided as guidance for replacing a damaged instrument panel bonding strap. 
Reference the bonding strap hardware stack up in Figure 6-14. 

The bonding strap is attached in two locations. The terminal lug is secured with a lock nut. To remove the 
strap, access both sides of the instrument panel and the nearby structure and unbolt the hardware.

1. Construct a bonding strap by attaching 5/16" inside diameter insulated terminal lugs

(MS20659-131) to both ends of the braid. 3/4" tinned copper flat braid (QQB575F36T781) or
equivalent may be used.

2. If needed, clean the attachment locations with a bonding brush.
3. Secure each end of the bonding strap to the previously installed locations. Ensure that the strap

does not loop back on itself and that the hardware is as shown in Figure 6-14. The washers must
seat fully against the aircraft metallic structure, without overhang or interference from other
hardware.

4. Using a milliohm meter, verify that the resistance between the connected structure is less than 2.5

milliohms.

Bolt

AN5-XA

Washer 1 (5/16" lock washer)

NASM35338-45

Washer 2 (5/16" flat washer)

NAS1149F0532P

Washer 3 (.063" thick flat washer)

NASM970-516 or AN970-5

Locknut (5/16")

MS21042, MS20364, MS21045, or MS20365

BOLT

WASHER 1

WASHER 2
WASHER 3

WASHER 3

LOCK NUT

LUG

INSTRUMENT PANEL