Appendix Bspecial Bonding Procedures; Considerations For Untreated Or Bare Dissimilar Metals; Figure B-1 Electrical Bonding Preparation - Nut Plate; Figure B-2 Electrical Bonding Preparation - Bolt/Nut Joint - Garmin GTX 330D Maintenance Manual

APPENDIX B
B.1 Considerations for Untreated or Bare Dissimilar Metals................................................................. B-1
B.2 Preparation of Aluminum Surfaces.................................................................................................. B-4
B.3 Composite Aircraft .......................................................................................................................... B-4
B.4 Tube and Fabric Aircraft.................................................................................................................. B-9
B.5 Bonding Jumper............................................................................................................................. B-12
Refer to SAE ARP1870 section 5 when surface preparation is required to achieve electrical bond.
B.1 Considerations for Untreated or Bare Dissimilar Metals
The correct material finish is important when mating untreated or bare dissimilar metals. Materials should
be galvanically-compatible. When corrosion protection is removed to make an electrical bond, any
exposed area after the bond is completed should be protected again. Additional guidance can be found in
AC 43.13-1B and SAE ARP1870. Typical electrical bonding preparation examples are shown in
figure B-1, figure B-2, and figure B-3.
LOCK WASHER
FLAT WASHER
Figure B-1 Electrical Bonding Preparation – Nut Plate
LOCK WASHER
FLAT WASHER
FLAT WASHER
LOCK NUT
Figure B-2 Electrical Bonding Preparation – Bolt/Nut Joint
LOCK WASHER
FLAT WASHER
FLAT WASHER
Figure B-3 Electrical Bond Preparation – Terminal Lug
190-00734-11
Rev. 6
SPECIAL BONDING PROCEDURES
GTX 33X and GTX 3X5 ADS-B Maintenance Manual
E-BOND PREP
0.50
E-BOND PREP
0.50
E-BOND PREP
E-BOND PREP
0.50
Page B-1