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R R R R R R (2) The components of the CIDS (Ref. 23-73-00) installed in the AFT utility area that have an interface with the EVAC system include: - Decoder/Encoder Units type DEU A and DEU B, located in the overhead area. - Cabin loudspeakers.
R R R D. CIDS (Ref. 23-73-00) Components - Avionics Compartment (Ref. Fig. 004)
R R R R R R (1) The CIDS components that have an interface with the EVAC system installed in the avionics compartment include: - Two CIDS directors. No. 1 (Active) is installed on panel 87VU and No. 2 (Hot-standby) is installed on panel 88VU in equipment rack 137MCU. Each director contains an Onboard Reprogrammable-Memory (OBRM).
R **ON A/C ALL
4. Interface_________ The evacuation and signaling equipment has interfaces with: - the Cabin Intercommunication Data System (CIDS) (Ref. 23-73-00).
5. Operation/Control and Indicating________________________________ (Ref. Fig. 005)
A. Evacuation Signaling Equipment Control
(1) Discrete input signals, supplied to the No. 1 CIDS director (active) from the cockpit, control the evacuation signaling equipment. If the No. 1 CIDS director becomes unserviceable, the No. 2 CIDS director (hot-standby) keeps the system in operation. Facilities to supply other input signals to the CIDS director from the AFT utility area or the FAP are optional.
B. Cockpit Controls and Indications
(1) The COMMAND pushbutton switch 3WP supplies the electrical ground connection for the evacuation command signals of the system. Operation of the COMMAND pushbutton switch to the ON position causes: - The ON indicator light (part of the switch) to come on. - Transmission of a signal from the CIDS director to the warning horn 5WP. - The EVAC indicator light (part of the COMMAND switch) to come on. - A flashed indication for a general alert.
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Principle Diagram, Evacuation Signaling Equipment
Figure 005
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CES
(2) The CAPT & PURS and CAPT (only) selector switch 2WP, selects who is able to activate an EVAC ALERT. The selection sequence of the switch is:
Switch set to CAPT & PURS position -------------------------------------------------------------------------------I I COCKPIT COMMAND SWITCH I I I-------------------------------------------------I I OFF I ON I -----------------------------I------------------------I------------------------I PURSER I OFF I No alert I Alert I I CONTROL I--------------I------------------------I------------------------I SWITCH I ON I Alert I Alert I -------------------------------------------------------------------------------
Switch set to CAPT position
-------------------------------------------------------------------------------I I COCKPIT COMMAND SWITCH I I I-------------------------------------------------I I OFF I ON I -----------------------------I------------------------I------------------------I PURSER I OFF I No alert I Alert I I CONTROL I--------------I------------------------I------------------------I SWITCH I ON I Alert I Alert I I I I cockpit only I I -------------------------------------------------------------------------------
(3) Operation of the HORN SHUT OFF pushbutton switch 7WP cancels the evacuation tone transmission to the warning horn 5WP in the cockpit.
C. Controls and Indications in the Cabin
(1) FAP
(a)
Operation of the EVAC CMD pushbutton switch causes:
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