S 972-002
(1) Write the present leg faults, if it is necessary.
NOTE: When you supply a new flight leg, you will erase the present
____
leg faults from the last flight.
S 862-003
(2)
Do this task to make sure the airplane is in the ground mode: "Check of the Air Mode/Ground Mode - Air/Ground Relay System" (Ref 32-09-02/201).
S 862-129
(3)
Make sure the left and center IRU's or the left and right IRU's are on.
NOTE: The IRU's can be in the ALIGN, NAV or ATT mode.
____
S 412-004
(4)
If one or more engines are in operation and have not stopped since the PSEU FAIL message was shown, do these steps:
(a)
Close all the entry doors.
(b)
Close all the cargo doors.
(c)
Close all the access doors.
S 862-005
(5)
If no engines are in operation, do this task to start one engine as specified for usual operation: "Power Plant Operation (Normal)" (AMM 71-00-00/201).
S 862-079
(6)
Open these circuit breakers in the sequence that follows:
(a)
P7, Overhead Circuit Breaker Panel
1) 7F25, PSEU SECT 1
2) 7F26, PSEU SECT 2
S 862-080
(7)
Close these circuit breakers in the sequence that follows:
(a)
P7, Overhead Circuit Breaker Panel
1) 7F26, PSEU SECT 2
2) 7F25, PSEU SECT 1
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S 862-010
(8) Stop for 30 seconds.
S 742-011
WARNING: YOU MUST DO THE OPERATIONAL TEST AFTER YOU SUPPLY A NEW FLIGHT
_______ LEG. IF YOU DO NOT DO THE TEST, IT IS POSSIBLE NOT TO FIND A FAILURE THAT IS THERE. THIS CONDITION CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(9)
Do this task: "PSEU - Operational Test" (AMM 32-09-03/501).
S 742-012
(10)
Make sure that there is no PSEU FAIL message in the present leg faults.
S 862-077
(11)
If it is necessary, do this task to stop the engines : "Power Plant Operation (Normal)" (AMM 71-00-00/201).
S 422-013
(12)
If the CDU shows the PSEU FAIL message after you do the operational test, replace the PSEU (AMM 32-09-03/401).
TASK 32-09-03-862-055
3. Erase the PSEU Memory (CMC Ground BITE Test Procedure)______________________________________________________
A. General
(1)
Before you do this procedure, make sure that the electrical power sources supply satisfactory power. Power sources that are unsatisfactory can cause a PSEU FAIL message that will not go away.
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 32-09-03/501, Proximity Switch Electronics Unit
C.
Access
(1)
Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
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MAINTENANCE MANUAL
PSEU Connector Data
Figure 201 (Sheet 1)
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MAINTENANCE MANUAL
DM7838FA SEE
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