34-42-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 ~................................................................ | P18 | P6 | .................................................................. | GND PROX WARN | STALL WARN (2) | .................................................................. | RADIO ALTM-1 | INTERPHONE POWER (B) | .................................................................. | VHF NAV-1 (VOR/ILS) | IND MASTER DIM BUS (9) | .................................................................. | NO. 1 AIR DATA (8) | AFDS MCP CRS 2 DC | .................................................................. | DAA NO. 1 (3) | RADIO ALTM-2 | .................................................................. | IRS NO. 1 (2) | LANDING GEAR AIR/GND | .................................................................. | STALL WARN (3) | RELAY & LTS | .................................................................. | DAA FMC NO. 1 | | .................................................................. | EFIS (2) | | .................................................................. | FMCS (4) | | .................................................................. | AFDS MCP DC | | 2................................…...............................1
 B.  Make sure that the flaps are up, and that the landing gear lever is in the OFF or DN position.
 C.  Do this task to apply electrical power: "Manual Control"
 (AMM 24-22-00/201).

 D.  Set an ILS frequency on VHF NAV-1 (AMM 34-31-02/501).
 E.  Make sure that the failure warning flag in the captain's height indicator and altimeter are not in view.
 F.  Make sure that the VHF NAV transfer switch is set at the NORMAL position.
 G.  Make sure that the GS flag on captain's ADI is out of view.
 3.  Present Status BITE___________________
 A.  To start the present status BITE you must hold the STATUS/HISTORY switch in the PRESENT STATUS position for a molment. This does the same internal checks as the operational test started from the flight compartment.
 NOTE: No test results, aural and/or visual, are annunciated in
____ the flight compartment during any of these procedures.
 (1)  
Each test sequence starts with a full segment, eight position, LED test pattern and stops with the display END TEST.

 (2)  
Each line shows for one second.

 (3)  
If no failures are found, the display reads GPWS OK.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SUNDSTRAND MK V GPWC ú

 34-42-01

 ú ú 07 Page 102 ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
AVAILABLE BITE DISPLAY MESSAGES
MESSAGE  MESSAGE HISTORY FLIGHT  MESSAGE STATUS PRESENT  COMMENTS/PROBABLE CAUSE 
FAILED GPWC  X  X  FAULTY GPWC. 
INVALID SELECT AUDIO  X  X  IMPROPERLY GROUNDED. MORE THAN ONE AAAS PINS GROUNDED. FAULTY GPWC OR PROGRAM PINS 
ALTIMETR INACTIVE RADIO  X  X  LOSS OF DATA ON RADIO ALTIMETER; OPEN CIRCUIT, OR SHORT TO GROUND. POWER LOSS OR FAULTY WIRING. 
ALTIMETR INVALID RADIO  X  X  FAULTY NO. 1 RADIO ALTIMETER. 
INACTIVE AIR DATA  X  X  OR FAULTY WIRING. LOSS OF DATA ON ADC BUS, OPEN CIRCUIT, OR SHORT CIRCUIT. POWER LOSS 
INVALID BARORATE  X  X  FAULTY ADC NO. 1. LOSS OF BNR LABEL 212, INCORRECT PARITY, FAILURE CODE IN SSM, OR NCD. 
INVALID ALTITUDE  X  X  FAULTY ADC NO. 1. LOSS OF BNR LABEL 203, INCORRECT PARITY, FAILURE CODE IN SSM, OR NCD. 
INVALID AIRSPEED  X  X  ADC NO. 1. LOSS OF BNR LABEL 206, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY 
INACTIVE ILS DATA  X  X  LOSS OF DATA ON ILS, OPEN CIRCUIT, OR SHORT CIRCUIT. POWER LOSS OR FAULTY WIRING. 
INVALID SLOPE GLIDE  X  X  FAULTY VHF NAV RECEIVER NO. 1. 
INVALID COURSE RUNWAY 
INACTIVE IRS DATA  X  X  OR FAULTY WIRING. LOSS OF DATA ON IRS BUS, OPEN CIRCUIT, OR SHORT CIRCUIT. POWER LOSS 
INVALID TRACK MAGNETIC  X  X  LOSS OF BCD LABEL 317, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY IRU NO. 1. 
INVALID FLAPS  X  X  (1) ABOVE 50 FT RAD ALT: LANDING FLAP DISCRETE "DOWN" AND AIRSPEED RAD ALT, ON APPROACH: LANDING FLAP DISCRETE "UP". FAULTY FLAP LANDING WARNING SWITCH OR FAULTY FLAP TAKEOFF WARNING SWITCH. GREATER THAN 250 KTS. MINOR FAULT . (2) BETWEEN 100 FT AND 50 FT1 
　
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