MINOR FAULTS DO NOT INHIBIT A CONFIDENCE TEST IN FLIGHT ABOVE 50 FT RAD ALT, BUT DO SO AFTER TOUCHDOWN (RAD ALT <50 FT). TO ENABLE THE CONFIDENCE TEST AND TO CANCEL THE "INOP" LIGHT ON THE GROUND, ALL FAULTS PRESENT MUST BE CORRECTED AND A "FLIGHT HISTORY" TEST PERFORMED.
BITE Display Messages
Figure 101 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SUNDSTRAND MK V GPWC ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
MESSAGE FLIGHT HISTORY MESSAGE PRESENT STATUS MESSAGE COMMENTS/PROBABLE CAUSE
CANCEL X INDICATES FLIGHT HISTORY READOUT CANCELLATION.
END TEST X X DENOTES END OF ALL READOUTS.
INVALID LOCALIZR X X LOSS OF BNR LABEL 173, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY VHF NAV RECEIVER NO. 1 OR CONTROL PANEL.
ALTITUDE INVALID CORRECTD X X = BARO CORRECTED ALTITUDE NO. 1 INVALID, LOSS OF BNR LABEL 204, INCORRECT PARITY, FAILURE CODE IN SSM. OR NCD. FAULTY ADC NO. 1
INVALID LATITUDE X X LOSS OF BNR, LABEL 310, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY IRU NO. 1
INVALID LONGITUD X X LOSS OF BNR LABEL 311, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY IRU NO. 1
INERTIAL VERTICAL SPEED INVALID X X LOSS OF BNR LABEL 365, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY IRU NO. 1
CANCEL AUDIO INVALID X X NOT USED
LATITUDE CORRECTD INVALID X X LOSS OF BNR LABEL 310, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY FMC
LONGITUD CORRECTD INVALID X X LOSS OF BNR LABEL 311, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY FMC
MAGNETIC TRACK CORRECTD INVALID X X LOSS OF BNR LABEL 317, INCORRECT PARITY, FAILURE CODE IN SSM. FAULTY FMC
INACTIVE FMC DATA X X LOSS OF DATA ON FMC BUS, OPEN CIRCUIT, OR SHORT CIRCUIT. POWER LOSS OR FAULTY WIRING.
QNH SELECTED X QNH/QFE PROGRAM PIN SELECTION. CORRECTED BARO ALTITUDE REFERENCED TO SEA LEVEL. PURPOSE: TO VERIFY
FLT HIST INVALID X CHECKSUM FAILURE OF FAULT MEMORY. FAULTY GPWC
INACTIVE DSW NO. 1 DATA X X OR FAULTY WIRING. LOSS OF DATA ON IRS BUS, OPEN CIRCUIT, OR SHORT CIRCUIT. POWER LOSS
INACTIVE DATA DSW NO. 2 X X OR FAULTY WIRING. LOSS OF DATA ON IRS BUS, OPEN CIRCUIT, OR SHORT CIRCUIT. POWER LOSS
INVALID AIR/GROUND X X AIR/GROUND RELAY (LANDING GEAR LOGIC SHELF) OPEN OR SHORTED.
BITE Display Messages
Figure 101 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SUNDSTRAND MK V GPWC ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
(4) If failures are found, the display shows the applicable failure code(s) (Fig. 101).
B. AIRPLANES WITH -208 AND SUBSEQUENT GPWC; The GPWC front panel display will show the ARINC 429 data contained on maintenance labels 351 through 353 after the database version is displayed. These maintenance data labels show the current status of program pins, input discretes, and selected DH validity. The maintenance labels will show for 30 seconds. Select the PRESENT STATUS two times to cancel the maintenance labels.
4. Flight History BITE___________________
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