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 31-51-02
 ALL  ú ú 01 Page 403 ú Jun 18/01
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A
747-400 MAINTENANCE MANUAL
 2) 7B01, MAWEA PWR B
 S 864-023
 (2)  Also open these circuit breakers and attach DO-NOT-CLOSE tags if you install the Stall Warning Card:
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7D05, STICK SHAKER L
 2) 7D19, STICK SHAKER R

 S 864-024
 (3)  Also open these circuit breakers and attach DO-NOT-CLOSE tags if you install the Aural Synthesizer Card:
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7A03, AURAL WARN L
 2) 7A04, AURAL WARN R

 S 424-039
 CAUTION: YOU MUST CAREFULLY DO THE STEPS IN THE TASK BELOW TO INSTALL A
_______ PRINTED-CIRCUIT CARD. A FAILURE TO DO THE STEPS CORRECTLY CAN CAUSE DAMAGE TO THE EQUIPMENT.
 (4)  Do this task to install the applicable printed-circuit card in the MAWEA card file: "ESDS Circuit Card Installation" (AMM 20-41-02/201).
 (a)  
Put the top and bottom edges of the printed-circuit card assembly into the card slots.

 (b)  
Push the card assembly in until it tightly engages in the connector.

 (c)  
Tighten the screws at the ends of the card.

 S 864-026
 (5)  Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7B01, MAWEA PWR B
 2) 7A01, MAWEA PWR A

 S 864-027
 (6)  Also close these circuit breakers and remove the DO-NOT-CLOSE tags if you replaced the Stall Warning Card:
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7D05, STICK SHAKER L
 2) 7D19, STICK SHAKER R

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 31-51-02
 ALL  ú ú 01 Page 404 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 864-028
 (7)  Also close these circuit breakers and remove the DO-NOT-CLOSE tags if you replaced the Aural Synthesizer Card:
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7A03, AURAL WARN L
 2) 7A04, AURAL WARN R

 S 704-037
 (8)  Do this task: "MAWEA Printed-Circuit Card Test" (Ref Paragraph 4).
 TASK 31-51-02-704-013
 4. MAWEA Printed-Circuit Card Test
_______________________________
 A. References
 (1)  
AMM 27-32-01/401, Stall Warning Card - R&I

 (2)  
AMM 31-31-00/501, Flight Recorder System

 (3)  
AMM 24-22-00/201, Manual Control

 B. Access
 (1)  Location Zone 116 Area Between Nose Wheel Well and Fuselage-RH 221/222 Control Cabin
 C. Procedure
 S 864-033
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 864-032

 (2)
Set the IRS L, C, and R switches to the ALIGN or NAV position.

 NOTE: You DO NOT have to wait the 10 minutes for the IRS to
____ align. The labels that the circuit card is checking are present as soon as the IRS is in the ALIGN or NAV position.
 S 864-034
 (3)  
Make sure these circuit breakers are closed:

 (a)  P7, Overhead Circuit Breaker Panel
 1) 7A03, AURAL WARN L
 2) 7A04, AURAL WARN R

 (4)
Open and then close these circuit breakers to start the test:

 S 864-030
 NOTE: Make sure you close these circuit breakers at the same
____ time. The BITE test can fail if these circuit breakers are closed individually.
 (a)  P7, Overhead Circuit Breaker Panel
 1) 7A01, MAWEA PWR A

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
　
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