Loss of the ADF2 Display on the F/O ND Only

TASK 34-53-00-810-830-A
Loss of the ADF2 Display on the F/O ND Only

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

3. Fault Confirmation
Subtask 34-53-00-740-098-A ** ON A/C NOT FOR ALL

A. Test
Do the BITE test of the ADF (system 2) AMM 34-53-00-740-003.

NOTE: Do the test with the EIS DMC selector switch (18WT) on the SWITCHING panel (8VU) at NORM then at F/O/3.

4. Fault Isolation
Subtask 34-53-00-810-088-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DMC1/2/3 (1WT1/2/3)/DDRMI (1FN)/ADF2 (2RP2) with the EIS DMC selector switch at NORM only:

(1) If the fault continues:

remove the DMC2
do a check and repair the wiring between the DMC2 and the first terminal block : for pins AA/8G, 8H of the DMC2 ASM 345301
install the DMC2.

Subtask 34-53-00-810-092-A ** ON A/C NOT FOR ALL

B. If the test gives the maintenance message DMC1/2/3 (1WT1/2/3)/DDRMI (1FN)/ADF2 (2RP2) with the EIS DMC selector switch at F/O/3 only:

(1) If the fault continues:

remove the DMC3
do a check and repair the wiring between the DMC3 and the first terminal block : for pins AA/8G, 8H of the DMC3 ASM 345301
install the DMC3.

Subtask 34-53-00-740-097-A ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:29 UTC