Loss of the CFDIU Input Bus on the RA2

TASK 34-42-00-810-830-A
Loss of the CFDIU Input Bus on the RA2

1. Possible Causes

XCVR-RA, 2 [2SA2]
wiring of the MAINTENANCE DATA INPUT bus from the RA transceiver 2 (2SA2) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-42-00-740-002	BITE Test of the Radio Altimeter
ASM 344202
AMM 34-42-33-000-001	Removal of the Radio Altimeter Transceiver
AMM 34-42-33-400-001	Installation of the Radio Altimeter Transceiver

3. Fault Confirmation
Subtask 34-42-00-740-088-A

A. Test
(1) Do the BITE test of the radio altimeter AMM 34-42-00-740-002.

4. Fault Isolation
Subtask 34-42-00-810-081-A ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message RADIO ALTM 2 NO DATA FROM CFDIU:

(1) If the fault continues:

Do a check and repair the wiring of the MAINTENANCE DATA INPUT bus from the RA transceiver 2 (2SA2) to the first terminal block ASM 344202.

Subtask 34-42-00-740-089-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:10 UTC