Loss of the IR Interface between the WXR Transceiver 2 and the ADIRU 2 + 3

TASK 34-41-00-810-837-A
Loss of the IR Interface between the WXR Transceiver 2 and the ADIRU 2 + 3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
AMM 34-41-00-740-002	BITE Test of the Weather Radar
ASM 344101
AMM 34-41-33-000-004	Removal of the Weather Radar Transceiver
AMM 34-41-33-400-003	Installation of the Weather Radar Transceiver

3. Fault Confirmation
Subtask 34-41-00-740-112-A

A. Test

NOTE: Do the test that follows with the ATT HDG selector switch (13FP), on the SWITCHING panel 8VU, at NORM then at F/O ON 3.

Do the BITE test of the weather radar AMM 34-41-00-740-002.

4. Fault Isolation
Subtask 34-41-00-810-096-A

A. If the test gives the maintenance message ADIRU2+3(1FP2+3) BUS IR/WXR2(1SQ2):

(1) If the fault continues:

(a) If the fault stops:

(b) If the fault continues:

swap back the ADIRU1 and the ADIRU2
swap the ADIRU-3 [1FP3] and the ADIRU1 AMM 34-12-34-000-001 and AMM 34-12-34-400-001.

1 If the fault stops:

2 If the fault continues:

remove the weather radar transceiver 2
remove the ADIRU2 and the ADIRU3
do a check and repair the wiring from the ADIRU2 to the weather radar transceiver 2 : from pins AB/5E, 6E of the ADIRU2 to pins AB/11J, 12J of the weather radar transceiver 2 ASM 344101 and the wiring from the ADIRU3 to the weather radar transceiver 2 : from pins AB/5E, 6E of the ADIRU3 to pins AB/12G, 13G of the weather radar transceiver 2.
install the weather radar transceiver 2
install the ADIRU2 and the ADIRU3.

Subtask 34-41-00-740-113-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:06 UTC