Loss of the IR Interface between the WXR transceiver 1 and the ADIRU 1 + 3

TASK 34-41-00-810-836-A
Loss of the IR Interface between the WXR transceiver 1 and the ADIRU 1 + 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 34-41-00-740-110-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 CAPT ON 3.

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

4. Fault Isolation
Subtask 34-41-00-810-095-A

A. If the test gives the maintenance message ADIRU1+3(1FP1+3) BUS IR/WXR1(1SQ1):

(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 ADIRU2 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 1
remove the ADIRU1 and the ADIRU3
do a check and repair the wiring from the ADIRU1 to the weather radar transceiver 1 : from pins AB/10C, 11C of the ADIRU1 to pins AB/11J, 12J of the weather radar transceiver 1 ASM 344101 and the wiring from the ADIRU3 to the weather radar transceiver 1 : from pins AB/10C, 11C of the ADIRU3 to pins AB/12G, 13G of the weather radar transceiver 1.
install the weather radar transceiver 1
install the ADIRU1 and the ADIRU3.

Subtask 34-41-00-740-111-A

B. Do the test given in Para. 3.

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