TB 43-0123
AS-1869/ARN-83
EIC: N/A
AS-2108/ARN-89
EIC: NIA
AS-1869/ARN Antenna
1. Brief Description: The AS-1869/ARN (Collins 437M-
3. Applicable Publications:
2) and AS-2108A/ARM-89 are low profile ADF sense
TM 11-1520-240-23
antennas installed on CH-47 aircraft.
They utilize
TM 11-1520-240-23P
semiflush mounting which allows installation directly over
the ADF loop antenna. The AS-1869 fits over the AS-
1863/ARN-83 op while the AS-2108A/ARM-89 fits over
the AT-780/ARN-89 loop.
2. Applicable Tools and Test Equipment:
Not applicable.
II-A-29
