(6)
The EFIS transfer relays are located on the E1-2 rack in the main equipment center, behind the Flight Management Computer.
D. The source of attitude and heading data to the EFIS symbol generators can be selected using the IRS transfer switch on the pilot's overhead panel. The IRS transfer switch enables the operator to select IRS - L or IRS - R as the input system to an EFIS symbol generator.
E. A basic confidence test of the EFIS can be performed by pressing the TEST switch on the front of the EFIS symbol generator. In addition, the EFIS can be thoroughly checked using FMS BITE. The FMS BITE allows the EFIS to be checked for inflight faults, ground faults, current faults, and the status of the discretes associated with the system.
2. System Interface (Fig. 2)________________
A. The principle airplane systems that are connected to the EFIS are listed below:
(1)
Inertial Reference System (Chapter 34-28)
(2)
Flight Management Computer System (Chapter 34-62)
(3)
Weather Radar System (Chapter 34-41)
(4)
VOR/ILS Navigation System (Chapter 34-31)
(5)
DME System (Chapter 34-55)
(6)
Air Data System (Chapter 34-12)
(7)
Stall Warning System (Chapter 27-32)
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A
737-300/400/500MAINTENANCE MANUAL
FORWARD OVERHEAD PANEL
SEE
E
PILOTS' GLARE SHIELD
SEE
F
CAPTAIN'S INSTRUMENT PANEL SEE
SEE
A
MAIN EQUIPMENT CENTER
TEST SWITCH RESET SWITCH (INOP)
Electronic Flight Instrument System - Component Location
Figure 1 (Sheet 1)
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A
737-300/400/500
MAINTENANCE MANUAL
RANGE SWITCH
1
DECISION HEIGHT SET SWITCH
EHSI BRIGHTNESS CONTROLS . OUTER CONTROL FOR OVERALL BRIGHTNESS . INNER CONTROL FOR RELATIVE RASTER BRIGHTNESS
EFIS CONTROL PANEL
AN INOPERATIVE TFC SWITCH, COVERED BY A BLANK PLACARD, MAY BE INSTALLED ON THE RANGE SWITCH OF SOME AIRPLANES. THIS SWITCH CAN BE USED TO SHOW TCAS INDICATIONS ON EFIS FOR AIRPLANES WITH OPERATIONAL TCAS.
Electronic Flight Instrument System - Component Location Figure 1 (Sheet 2)
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A 737-300/400/500MAINTENANCE MANUAL
(EADI) (EHSI)
INSTRUMENT TRANSFER SWITCHES
E
2
AIRPLANES WITH A DUAL FMC SYSTEM
Electronic Flight Instrument System - Component Location Figure 1 (Sheet 3)
G18956
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A 737-300/400/500MAINTENANCE MANUAL
REMOTE LIGHT SENSOR
F
Electronic Flight Instrument System - Component Location Figure 1 (Sheet 4)
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