(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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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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