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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 (b)  
Put the speaker in the ceiling.

 (c)  
Tighten the four screws.

 S 864-015
 (2) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A04 AURAL WARN R
 2) 7A03 AURAL WARN L

 TASK 31-52-04-704-008
 4.  Aural Warning Speaker Test__________________________
 A. References
 (1)  
31-52-00/501, Aural Warning System Test

 (2)  
24-22-00/201, Manual Control

 B. Access
 (1)  Location Zone
 221 Control Cabin

 C. Procedure
 S 864-013
 (1)  
Supply electrical power (Ref 24-22-00/201).

 S 734-010

 (2)  
Do this task to make sure the aural warning speakers operate correctly: "BITE Test" (AMM 31-52-00/501).

 (a) Make sure you hear a 1000 Hz tone from each speaker.
 NOTE: The length of the tone is 500 ms.
____
 S 864-014
 (3)  Remove electrical power if it is not necessary (Ref 24-22-00/201).
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747-400 MAINTENANCE MANUAL
 INTEGRATED DISPLAY SYSTEM - DESCRIPTION AND OPERATION
_____________________________________________________
 1.  General (Fig. 1)
_______
 A.  The following is an alphabetical list of the major topics covered in this description and operation of the Integrated Display System. Refer to chapter 31-61, in the Table of Contents, to locate the page numbers for these topics or related sub-topics.
 EFIS Displays - Navigation
 EFIS Displays - Primary Flight
 EICAS Displays - Engine Parameter
 EICAS Displays - Maintenance
 EICAS Displays - Status
 EICAS Displays - Synoptic
 EICAS Messages - Crew Alerting/Status
 IDS Components
 Interface - EFIS
 Interface - EICAS
 Interface - Miscellaneous
 Interface - System
 Operation
 Overview - EFIS
 Overview - EICAS

 B.  The Integrated Display System (IDS) on the 747-400 airplane is the integration of the Electronic Flight Instrument System (EFIS) and the Engine Indicating Crew Alerting System (EICAS) into a single system. The EFIS and EICAS information is presented on stroke and raster written multicolor cathode ray tube (CRT) displays. These displays, referred to as Integrated Display Units (IDUs), provide EFIS and EICAS information in a form suitable for accurate and rapid interpretation by the flight crew. In addition, the displays maintain a "quiet, dark flight deck".
 C.  Data is transmitted to the IDS from many airplane systems. The IDS formats this data for display on six IDUs. The IDUs display flight, navigation, and engine information, and crew alerting and status messages. The IDUs comprise the Primary Flight Display (PFD), the Navigation Display (ND), and the EICAS displays.
 D.  The EFIS portion of the IDS includes the Primary Flight Display (PFD) and the Navigation Display (ND). Attitude, flight director, altitude and airspeed information are displayed on the PFD. Navigation information and weather radar are on the ND.
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 31-61-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400
MAINTENANCE MANUAL

SEE
SEE
E2-6
SEE
Integrated Display System - Component Location
Figure 1 (Sheet 1)

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