FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 11. Aircraft Electrical Systems | 20. Electrical and Electronic Symbols | 11-272. Symbols
AC 43.13-1B
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol
9/8/98
Meaning
Intentional Isolation of Direct-Current
Path in Coaxial or
Waveguide Applications
Waveguide
Strip-Type Transmission Line
Termination
Circuit Return
Pressure-Tight Bulkhead Cable
Gland
Cable Sealing End
Switching Function
Electrical Contact
Page 11-108
Par 11-272