BR3000-330-2CL,-3CL,-2EN CMM and IPL
Document No. 33-21-57, Rev. A
Page 34
4.2 DECOMPRESSION OVERRIDE
If there is a sudden loss of pressure in the aircraft cabin, a signal will be sent to the
MLCP indicating a decompression condition has occurred. The MLS systems will
respond to this condition by transitioning immediately to the High (Default White) lighting
state. During a decompression event, all keypad functions on the MLCP are disabled
and flight crew cannot override this condition.
4.3 SCENARIO RE-PROGRAMMING
The Scenario content that is programmed behind each of the ten Scenario function
buttons can be modified at the user’s discretion. In addition, the TEST Scenario can
also be modified if so desired. Modification of Scenario content is achieved using a
special application supplied with the MLS system called the Scenario Editor and
Downloader Application (SEDL). This application runs on standard PC’s running the
Windows™ XP, Vista, or Win 7 operating systems. The PC is connected to the
BR3000-330 system via a USB connection with the MLCP unit. The USB connector on
the MLCP unit is protected when not in use by a sliding door. A standard Type-A to
Type-B USB cable is used to connect to the MLCP USB port. It should be noted that in
the interest of safety, the MLCP USB port is disabled while the aircraft is airborne.
The SEDL application is used to create and store Scenario designs. This program can
be used in a stand-alone configuration, or the PC running the application can be
connected to the MLCP during Scenario development. The SEDL application allows the
connected MLS system to be controlled in real-time through the PC. This allows for
quick development and review of Target Colors and also playback and review of
Scenario designs.
The SEDL application is also used to assign completed Scenarios to specific MLCP
units; for example, either the Business Class or Economy Class MLCP unit. Once
Scenarios have been assigned to each MLCP in the installation, this completed
configuration is referred to as a Bundle. The completed Bundle is typically sealed and
given a configuration name using the SEDL. In this manner, the Scenario Bundle
cannot be tampered with and configuration control can be maintained. The same
Scenario Bundle is then loaded to each MLCP unit in the aircraft installation. Scenario
definitions are stored in the MLCP units in non-volatile flash memory.
For more information on the development of Scenarios and the use of the SEDL
application, refer to Bruce Document 351-595, the Scenario Editor (SEDL) User’s
Manual.
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