737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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AIR/GROUND SYSTEM - TRAINING INFORMATION POINT - PSEU BITE
AIR/GROUND SYSTEM - TRAINING INFORMATION POINT - PSEU BITE
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AIR/GROUND SYSTEM - TRAINING INFORMATION POINT - PSEU BITE
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
PSEU Existing Faults
The existing faults report shows a list of all active or latched
faults in the PSEU.
To do the existing faults report, do these steps:
* Go to the main menu
* Use the up or down arrow switches until you see EXISTING
FAULTS? in the BITE display
* Push the YES switch.
If the test passes, the display shows NO FAULTS. If the test fails,
the display shows a fault message. You can use the switches on
the BITE panel to see more information about the fault
message. You can also see if there are other fault messages.
If there is one or more existing fault, the first message shows
the dispatch status of the airplane. The message NO DISP
FAULT is for one or more non-dispatchable fault. The message
DISPATCH FAULT is for one or more dispatchable fault.
PSEU Fault Messages
Each PSEU fault message has a single maintenance action. The
fault message has a BITE message number. This is the format
for the BITE message numbers:
* Eight characters in length
* The first two characters are the ATA chapter number of the
system
* The third character is a hyphen (-)
* The fourth character is the first number of the ATA section
number of the faulted sub-system.
The last four digits show the fault:
* 0XXX - power faults
* 1XXX - sensor faults
* 2XXX - discrete input faults
* 3XXX - report faults
* 4XXX - others
* 5XXX - inputs that have no cycles (TOW and SPDBRK tests)
* 6XXX - field programmable gate array (FPGA) output load
faults.
PSEU Status Messages
The PSEU shows these status messages for these conditions:
* Message 32-04001 - AIR/GND OVERRIDE shows that the
PSEU outputs are in the override condition (this is not a
fault).
* Message 32-64001 - INTERNAL FAULT shows that there is a
fault internal to the PSEU.
* Message 32-64002 - TEST NOT COMPLETE shows that a test
on the PSEU was interrupted.
* Message 32-64003 - DISPATCH FAULT shows that there is an
existing dispatch type fault and the PSEU light can be turned
off.
* Message 32-64004 - NO DISP FAULT shows that there is an
existing no dispatch type fault and the fault must be
corrected to turn off the PSEU light.
AIR/GROUND SYSTEM - TRAINING INFORMATION POINT - EXISTING FAULTS
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* Message 32-66007 - DISPATCH 1 FAULT shows that there is
an existing dispatch type fault.
* Message 32-66010 - NO DISP 1 FAULT shows that there is an
existing no dispatch 1 type fault.
* Message 32-66017 - DISPATCH 2 FAULT shows that there is
an existing dispatch 2 type fault.
* Message 32-66020 - NO DISP 2 FAULT shows that there is an
existing no dispatch 2 type fault.
The PSEU shows these status messages when a problem exists
with the flight recorder and the mach airspeed warning module
for these conditions:
* Message 32-66007 - DISPATCH 1 FAULT shows that the
PSEU does not sense the expected load on the DISPATCH
FAULT A output.
* Message 32-66010 - NO DISP 1 FAULT shows that the PSEU
does not sense the expected load on the NO DISPATCH
FAULT A output.
* Message 32-66017 - DISPATCH 2 FAULT shows that the
PSEU does not sense the expected load on the DISPATCH
FAULT B output.
* Message 32-66020 - NO DISP 2 FAULT shows that the PSEU
does not sense the expected load on the NO DISPATCH
FAULT B output.
More Details
MORE DETAILS? shows this information for the fault message:
* LATCHED YES or NO
* Connector and pin number.
LATCHED shows if the fault is latched. Faults that only occur
when the airplane is in the air are latched so you can see them
when you do the EXISTING FAULTS test on the ground. The
connector and pin number message shows that information
　
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