Loss of the ADF1 Data on the RMI

TASK 34-57-00-810-806-A
Loss of the ADF1 Data on the RMI

1. Possible Causes

RECEIVER-ADF, 1 [2RP1]
wiring of the BEARING OUTPUT BUS 2 bus from the ADF1 receiver (2RP1) to the first terminal block
RMI-VOR/ADF/DME [21FN]
wiring of the ADF1 bus from the VOR/ADF/DME RMI (21FN) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 34-53-00-810-820-A	Loss of the ADF 1 Data on the ND
AMM 34-53-00-710-002	Operational Test of the ADF
AMM 34-53-00-740-003	BITE Test of the ADF
AMM 34-53-31-000-002	Removal of the ADF Receiver
AMM 34-53-31-400-002	Installation of the ADF Receiver
ASM 345701
AMM 34-57-22-000-002	Removal of the VOR/ADF/DME RMI
AMM 34-57-22-400-002	Installation of the VOR/ADF/DME RMI

3. Fault Confirmation
Subtask 34-57-00-710-050-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the operational test of the ADF AMM 34-53-00-710-002.

4. Fault Isolation
Subtask 34-57-00-810-058-C ** ON A/C NOT FOR ALL

A. If during the test, on the RMI, the ADF1 pointer does not indicate the station set:

(1) If no flag comes into view on the RMI and on the ND:

(2) If the flag comes into view on the RMI and on the ND:

(a) If the BITE test gives a maintenance message:

(b) If the BITE test does not gives a maintenance message:

1 If the fault continues:

do a check and repair the wiring of the BEARING OUTPUT BUS 2 bus from the ADF1 receiver (2RP1) to the first terminal block ASM 345701.

(3) If the flag comes into view only on the RMI:

(a) If the fault continues:

do a check and repair the wiring of the ADF1 bus from the VOR/ADF/DME RMI (21FN) to the first terminal block ASM 345701.

Subtask 34-57-00-710-051-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:33 UTC