(c)  
Push the LSK adjacent to the <OTHER FUNCTIONS prompt to show the OTHER FUNCTIONS menu.

 (d)  
Push the LSK adjacent to the <INPUT MONITORING prompt to show page 1 of INPUT MONITORING.

 (e)  
Put C/035/350/00 in the scratchpad.

 (f)  
Push the LSK adjacent to the -/---/---/-- prompt.

 (g)  
Make sure the word SAMPLE indication is shown on the line below C/035/350/00.

 NOTE: The SAMPLE indication shows the CMC is serviceable.
____ There are three samples of data on the display. Each sample has two lines of 1's and 0's. Bit 32 is the left bit of the first line. Bit 1 is the right bit of the second line.
 S 714-021
 (3)  
Do these steps to test the output bus for the speed brake switch:

 S 864-024

 (4)  
On the CDU, put E/057/271/00 in the scratchpad.

 S 864-011

 (5)  
Monitor the thrust resolver angle (TRA) on the EICAS EPCS maintenance display (AMM 45-10-00/201).

 S 864-012

 (6)  
Put the No. 1 and 3 thrust levers in a thrust position of more than 27 degrees (62.7 degrees TRA).

 S 864-013

 (7)  
Put the speed brake lever in the ARMED position.

 S 864-026
 WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL
_______ SURFACES, THE THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER. THIS CAN CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
 (8)  Do this task: "Supply Hydraulic Power" (AMM 29-11-00/201).
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747-400 MAINTENANCE MANUAL
 S 714-015
 (9) Put the thrust levers in the idle position.
 (a) Make sure the speed brake lever moves to the UP position.
 S 864-022
 (10) On the CDU, push the LSK adjacent to the -/---/---/-- prompt.
 (a) Make sure bit 20 is 1.
 S 714-016
 (11) Put the speed brake lever in the DOWN position.
 (a)
Make sure the actuator goes to the retracted position.

 (b)
On the CDU, make sure bit 20 is 0.

 E. Put the Airplane Back to Its Usual Condition
 S 864-017
 (1)
Do this task: "Remove Hydraulic Power" (AMM 29-11-00/201).

 (2)
Do this task: "Remove Electrical Power" (AMM 24-22-00/201).

 S 864-018
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747-400 MAINTENANCE MANUAL
 AURAL WARNING SYSTEM - DESCRIPTION AND OPERATION
________________________________________________
 1.  General (Fig. 1 and 2)_______
 A.  The aural warning system provides easily distinguishable visual (master warning and greenband indicating lights) and audible signals to warn the flight crew of unsafe or abnormal flight conditions. It also performs the auxiliary function of gaining the attention of the flight crew for the purpose of communication.
 B.  The primary functions also include control activation of the Master Warning lights, processing for the speed tape display of the Primary Flight Display (PFD) of the IDS, processing for the Pitch Limit Indication (PLI) function of the PFD,generation and control of warning, caution and advisory level aural alerts, perform signal consolidation functions and generates tail number indentification data.
 C.  Warnings are provided for the following: abnormal takeoff and landing condition, excessive airspeed, autopilot disconnect, altitude alert, windshear, ground prox, stall warning, speed brake, resettable and non-resettable configuration warning, cabin pressure and fire detection condition in the engines, APU, wheel wells, or lower cargo compartments.
 D.  Call signals are provided for the following: receipt of a selective call (selcal) signal from the communications equipment; receipt of a call signal from an attendant or from the ground crew station.
　
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