Loss of the CFDIU Input Bus on the ADF 1

TASK 34-53-00-810-813-A
Loss of the CFDIU Input Bus on the ADF 1

1. Possible Causes

RECEIVER-ADF, 1 [2RP1]
wiring of the MAINTENANCE DATA INPUT bus from the ADF receiver 1 (2RP1) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-53-00-740-003	BITE Test of the ADF
ASM 345301
AMM 34-53-31-000-002	Removal of the ADF Receiver
AMM 34-53-31-400-002	Installation of the ADF Receiver

3. Fault Confirmation
Subtask 34-53-00-740-074-A

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

4. Fault Isolation
Subtask 34-53-00-810-064-B

A. If the test gives the maintenance message CFDIU (1TW)/ADF1 (2RP1):

(1) If the fault continues:

do a check and repair the wiring of the MAINTENANCE DATA INPUT bus from the ADF receiver 1 (2RP1) to the first terminal block ASM 345301.

Subtask 34-53-00-740-075-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:26 UTC