FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 12. Aircraft Avionics Systems | 2. Ground Operational Checks for Avionics Equipment (Electrical) | 12-27. Data Bus
9/27/01
dar System equipment manufacturer’s
manuals and procedures.
12-26. RADOME INSPECTION. Inspec
tion of aircraft having weather radar installa
tions should include a visual check of the ra
dome surface for signs of surface damage,
holes, cracks, chipping, and peeling of paint,
etc. Attach fittings and fastenings, neoprene
erosion caps, and lightening strips, when in
stalled, should also be inspected.
12-27. DATA BUS. Data Buses provide the
physical and functional partitioning needed to
enable different companies to design different
avionics boxes to be able to communicate in
formation to each other. It defines the frame
work for system(s) intergration. There are
several types of data bus analyzers used to re
ceive and review transmitted data or to trans
mit data to a bus user. Before using an ana
lyzer, make sure that the bus language is com
patible with the bus analyzer. For further in
formation refer to ARINC specifications such
as 429 Digital Information Transfer System,
Mark 33 which offers simple and affordable
answers to data communications on aircraft.
12-28. ELECTRIC COMPATABLITY.
When replacing an instrument with one which
provides additional functions or when adding
new instruments, check the following electrical
( where applicable) for compatibility:
a. Voltage (AC/DC).
b. Voltage polarity (DC).
c. Voltage phase (s) (AC).
d. Frequency (AC).
e. Grounding (AC/DC).
f. System impedance matching.
g. Compatibility with system to which con
nected.
12-29.12-36. [RESERVED.]
Par 12-26
AC 43.13-1B CHG 1
Page 12-11 (and 12-12)