(2)  
This task contains these procedures:

 (a)  
Prepare for the System Test

 (b)  
ILS Antenna Transfer Relay Test

 (c)  
VOR Test

 (d)  
LOC Test

 (e)  
Glide Slope Test.

 B.  Standard Tools and Equipment
 (1)  VOR/ILS Ramp Test Set - 972Q-4; Collins, Cedar Rapid, Iowa, or NAV-401L; Instrument & Flight Research Inc, Witchita, KS.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 C.  References
 (1)  
AMM 22-11-00/501, Digital Flight Control System

 (2)  
AMM 23-51-00/501, Flight Interphone System

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
AMM 34-28-00/501, Inertial Reference System

 D.  Access
 (1)  Location Zone
 101,102 Control Cabin

 E.  Prepare for the System Test
 S 865-049
 (1)  Do the prepare for the system test:
 (a)  
Supply electrical power (AMM 24-22-00/201).

 (b)  
Make sure these systems are serviceable: 1) The digital flight control system (AMM 22-11-00/501). 2) The flight interphone system (AMM 23-51-00/501). 3) The inertial reference system (AMM 34-28-00/501).

 (c)  
Close these circuit breakers:
 1) P18 Load Control Center - Left
 a) VOR/LOC-1

 2)  P6 Load Control Center - Right
 a) VOR/LOC-2

 (d)
Set the controls on the DFCS mode select panel as follows:

 1)  Course counter - Airplane heading that shows on the compass rose. a) Make sure the course arrows on the two HSIs agree with
 the course counter.
 2) HDG SEL switch - ON
 3) Autopilot - disengaged

 (e)  Set the left inertial reference system (IRS) and the right IRS to a heading of 000° (AMM 34-28-00/501). 1) Make sure the HDG flags on the two RDDMIs are out of view. 2) Make sure the compass cards for the two RDDMIs read 000°.
 NOTE: The pointers for the two RDDMIs must agree.
____

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 (f)  
Set the VOR/ADF switches on the two RDDMIs to VOR.

 1)  Make sure the VOR pointer annunciators show on the two RDDMIs.

 (g)  
Set these transfer switches as follows:
 1) ATTITUDE transfer switch - NORMAL
 2) COMPASS transfer switch - NORMAL
 3) VHF NAV transfer switch - NORMAL

 a)  Make sure the system annunciator on the captain's HSI shows 1. b) Make sure the system annunciator on the first officer's HSI shows 2. 4) HSI transfer switches - VOR/ILS. a) Make sure the navigation source annunciators on the two HSIs show VOR/ILS.

 (h)  
Put the ramp test set approximately 75 feet (unobstructed) from the side of the airplane fin.

 (i)  
Set up the ramp test set to supply a 0° radial signal with a 1020Hz modulation at a frequency of 108.00 MHz.

 NOTE: When using Instrument Flight Research NAV-401L test set,
____ the "to/from" switch must be in the "from" position.
 F.  ILS Antenna Transfer Relay Test
 S 735-035
 (1)  Do the ILS antenna transfer relay test:
 (a)  
Do the prepare for the system test.

 (b)  
Set the VHF NAV transfer switch to the NORMAL position.

 (c)  
Open this circuit breaker:

 1)  P6 Load Control Center - Right
 a) VOR/LOC-2

 (d)  
Set a frequency of 108.00 MHz on the No. 1 VHF NAV control panel. 1) Make sure the navigation warning flag on the captain's HSI

 is in view.
　
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