Loss of the LOC Indication on the PFD(s) and ND(s)

TASK 34-36-00-810-823-A
Loss of the LOC Indication on the PFD(s) and ND(s)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2044160
AMM 34-36-00-720-002	Functional Test of the ILS
AMM 34-36-00-720-006	Functional Test of the ILS
ASM 343601
AMM 34-36-11-000-001	Removal of the Localizer Antenna
AMM 34-36-11-400-001	Installation of the Localizer Antenna
AMM 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-400-001	Installation of the ILS Receiver

3. Fault Confirmation
Subtask 34-36-00-720-052-B ** ON A/C NOT FOR ALL

A. Test
Do the functional test of the MMR AMM 34-36-00-720-002.

Subtask 34-36-00-720-052-C ** ON A/C NOT FOR ALL

A. Test
Do the functional test of the MMR AMM 34-36-00-720-006.

4. Fault Isolation
Subtask 34-36-00-810-075-B

A. If the LOC indication does not come into view on the CAPT PFD and F/O ND during the test:

(1) If the fault continues:

Do a check of the wiring from the localizer 1/2 antenna (3RT) to the MMR-1 (40RT1) ASM 343601 and ESPM 2044160.

(a) If there is no continuity:

(b) If there is continuity:

Subtask 34-36-00-810-076-B

B. If the LOC indication does not come into view on the F/O PFD and CAPT ND during the test:

(1) If the fault continues:

Do a check of the wiring from the localizer 1/2 antenna (3RT) to the MMR-2 (40RT2) ASM 343601 and ESPM 2044160.

(a) If there is no continuity:

(b) If there is continuity:

Subtask 34-36-00-810-086-A

C. If the LOC indication does not come into view on the two PFDs and the two NDs during the test:

Subtask 34-36-00-720-053-A

D. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:58 UTC