(a)  
On the electronic load circuit breaker panel, P6: 1) GPS 1

 (b)  
On the electronic load circuit breaker panel, P18: 1) GPS 2

 E. Procedure
 S 585-004
 (1)  
Move the airplane to a position where the GPS antennas have a clear view of the GPS satellites.

 S 715-008

 (2)  
Do these steps to see the GPS position on an FMC CDU:

 (a)  
Push the INIT REF key on one of the CDUs.

 (b)  
Push the line select key (LSK) that is adjacent to <INDEX.

 (c)  
Push the LSK that is adjacent to <POS.

 (d)  
Push the NEXT PAGE key on the CDU.

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A
737-300/400/500MAINTENANCE MANUAL
 (e)  Make sure the POS REF 2/3 page is shown. 1) Make sure the GPS R position is shown on the line above RADIO.
 2)  Make sure the GPS L position is shown on the line above the GPS R position.
 NOTE: As much as 10 minutes of time can be necessary for
____ the positions to show on the CDU.
 TASK 34-58-00-735-009
 3.  System Test - Global Positioning System
_______________________________________
 A.  General
 (1)  This task does a GPS interface check.
 B.  Reference
 (1)  AMM 24-22-00/201, Manual Control
 C.  Access
 (1)  Location Zones
 101/102 Flight Compartment

 D.  Prepare for the Test
 S 865-010
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 865-019

 (2)  
Make sure these circuit breakers are closed:

 (a)  
On the electronic load circuit breaker panel, P6: 1) GPS 1

 (b)  
On the electronic load circuit breaker panel, P18: 1) GPS 2

 E.  Procedure
 S 585-011
 (1)  Move the airplane to a position where the GPS antennas have a clear view of the GPS satellites.
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737-300/400/500MAINTENANCE MANUAL
 S 715-020
 (2)  Do these steps to see the GPS position output on an FMC CDU:
 (a)  
Push the INIT REF key on one of the CDUs.

 (b)  
Push the line select key (LSK) that is adjacent to <INDEX.

 (c)  
Push the LSK that is adjacent to <POS.

 (d)  
Push the NEXT PAGE key on the CDU. 1) Make sure the GPS R position is shown on the line above RADIO.

 2)  Make sure the GPS L position is shown on the line above the GPS R position.
 NOTE: As much as 10 minutes of time can be necessary for
____ the positions to show on the CDU.
 (e)  Do these steps to do a check of the GPS enable function: 1) Push the NEXT PAGE key on the CDU. 2) Push the LSK adjacent to NAV STATUS>. 3) Push the NEXT PAGE key on the CDU. 4) Make sure that the ON below GPS UPDATE is highlighted on
 the NAV OPTIONS 2/2 page. 5) If the OFF below GPS UPDATE is highlighted, push the adjacent lsk. 6) Make sure that the display changes so that the ON below GPS UPDATE is highlighted.
 S 715-014
 (3)  Do these steps to do a check of the GPS/FMC and GPS/MCU (master caution unit) data busses.
 (a)  
Open the GPS 1 circuit breaker on the P18 circuit breaker panel. 1) Make sure the GPS L position goes out of view on the CDU. 2) Make sure the GPS R position stays in view on the CDU. 3) Make sure the GPS annunciator on the IRS MSU (P5) stays

 off.

 (b)  
Open the GPS 2 circuit breaker on the P6 circuit breaker panel. 1) Make sure the GPS R position goes out of view on the CDU. 2) Make sure the GPS L position stays out of view on the CDU. 3) Make sure the two IRS master caution annunciators (P10)
　
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