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A
747-400 MAINTENANCE MANUAL
 S 735-092
 (9)  Make sure the speed brake lever moves to the DN position in approximately 1.5 seconds after you operate the landing gear switch:
 NOTE: The speed brake lever must start to move immediately after
____
 you operate the landing gear switches:

 (a)  Do this task to operate the landing gear switches: "Put Air/Ground Relay System in the Air Mode" (AMM 32-09-02/201).
 S 085-094
 (10)
 Do this task to remove the signals from the landing gear switches: "Put Air/Ground Relay System Back in the Ground Mode" (AMM 32-09-02/201).

 S 865-095

 (11)
 Do this task:  "Put Safety-Sensitive Systems Back to the Condition Before Air Mode Simulation" (AMM 32-09-02/201).

 L.  
Do the Test of the Automatic Speed Brake Actuator in the Unusual Landing Condition

 S 865-096
 (1)  
Make sure the speed brake lever is in the DN position.

 S 865-097

 (2)  
Make sure that the No. 1 and 3 thrust levers are in the idle position.

 S 865-098

 (3)  
Make sure the No. 2 and 4 reverse thrust levers are in the idle position.

 S 735-099

 (4)  
Measure the operation time to the UP position with the No. 2 reverse thrust lever.

 (a)  
Slowly move the No. 2 reverse thrust lever aft (more than 30° from reverse idle) until the speed brake handle starts to move.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 (b)  
Make sure the speed brake lever moves to the UP position in approximately 1.5 seconds after it starts.

 (c)  
Move the No. 2 reverse thrust lever to the idle position.

 S 865-100
 WARNING: YOU MUST CAREFULLY FOLLOW THE STEPS IN THE REFERENCED TASK TO
_______ PREPARE THE SAFETY SENSITIVE SYSTEMS FOR THE AIR MODE. FAILURE TO FOLLOW THE STEPS CORRECTLY CAN CAUSE THE AUTOMATIC OPERATION OF THE AIRPLANE SYSTEMS. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
 (5)  
Do this task: "Prepare Safety-Sensitive System for Air Mode Simulation" (AMM 32-09-02/201).

 S 865-145

 (6)  
Make sure the following circuit breaker is closed:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7G6, SPEED BRAKE AUTO CONT

 S 735-000
 (7)  
Do a test of the automatic retraction of the speed brakes:

 (a)  
Do this task to operate the landing gear switches: "Put Air/Ground Relay System in the Air Mode" (AMM 32-09-02/201).

 (b)  
Make sure the speed brake lever automatically moves to the DN position.

 (c)  
Do this task to remove the signals from the landing gear switches: "Put Air/Ground Relay System Back in the Ground Mode" (AMM 32-09-02/201).

 S 865-103
 (8)  
Do this task: "Put Safety-Sensitive Systems Back to the Condition Before Air Mode Simulation" (AMM 32-09-02/201).

 S 725-104

 (9)  
Measure the operation time to the UP position with the No. 4 reverse thrust lever.

 (a)  
Slowly move the No. 4 reverse thrust lever aft (more than 30° from reverse idle) until the speed brake handle starts to move.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-62-00
 ALL  ú ú 05 Page 530 ú Jun 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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