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747-400 FAULT ISOLATION/MAINT MANUAL
NOSE RADOME SEE
Instrument Landing System - Component Location
Figure 102 (Sheet 1)
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747-400 FAULT ISOLATION/MAINT MANUAL
LEFT, RIGHT OR CENTER ILS RECEIVER,
B620, B628 OR B7439
Instrument Landing System - Component Location
Figure 102 (Sheet 2)
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L33757
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747-400 FAULT ISOLATION/MAINT MANUAL
C/L DUAL G/S TRACK ANTENNA, B559
FWD
LEFT AFT NOSE GEAR DOOR
C
R DUAL G/S
TRACK
ANTENNA, B561
P7 PANEL
FWD
RIGHT AFT NOSE GEAR DOOR
D
FLT COMPT
Instrument Landing System - Component Location
Figure 102 (Sheet 3)
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747-400 MAINTENANCE MANUAL
INSTRUMENT LANDING SYSTEM - ADJUSTMENT/TEST
___________________________________________
1. General_______
A. This subject has three tasks. The first task is an operational test of the instrument landing system (ILS). The second task is a ground test of the ILS. The third task is a system test of the ILS.
TASK 34-31-00-715-001
2. Operational Test - Instrument Landing System____________________________________________
A. General
(1)
The operational test does not use external test equipment and thus it can do a system check quickly. This task uses the audio control panel (ACP) to do the operational test.
(2)
This task contains these two procedures:
(a)
Prepare for the Operational Test
(b)
Audio Test.
B. References
(1)
AMM 23-51-00/501, Flight Interphone System
(2)
AMM 24-22-00/201, Manual Control
(3)
AMM 31-61-00/501, Integrated Display System
(4)
AMM 34-61-02/401, Control Display Unit
C. Access
(1) Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
D. Preconditions
S 865-259
(1) These conditions are necessary for this task:
(a)
Electrical Power on (AMM 24-22-00/201).
(b)
Integrated Display System (IDS), serviceable (AMM 31-61-00/501).
(c)
Flight Interphone System, serviceable (AMM 23-51-00/501).
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(d) Control Display Unit (CDU), installed (AMM 34-61-02/401).
E. Prepare for the Operational Test
S 865-260
(1) Make sure these circuit breakers are closed:
(a) P7 Overhead Circuit Breaker Panel
1) 7A6 NAV RADIO MMR L
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