737 MAX Flight Crew Operations Manual
Communications -
System Description
MN-FLT-OH-201
5.20.5
The PRAM is typically located above the FA seats on the LAV A wall.
When an announcement is selected, the PRAM micro-processor accesses the
announcement and broadcasts the information. PRAM announcements can be
selected using the PRAM key pad after pressing the ANNC button on the Mode
Control Select Panel. An announcement is automatically initiated whenever the
"fasten seat belt" light is illuminated or cabin de-pressurization causes the cabin
oxygen masks to drop. A flight pattern selection provides announcements that are
programmed in blocks for a flight pattern or route. A flight pattern can have a
maximum of 10 announcement blocks, with a maximum of 9 announcements per
block
The PRAM content is developed by an operator based on operator-unique
requirements such as required languages, message length, and the number of times
the annoucements repeat. Typical announcements are:
• Emergency messages designed to reduce crew workload during critical
times and to ensure emergency information is announced accurately and
succinctly.
• Informational messages which are repeated often (EX: Fasten Seat
Belts) and those which are long and interfere with crew operations (EX:
customs information).
When the PRAM is initially powered-up, the PRAM performs a self-test. When
the self-test is completed, the LCD momentarily displays "SELF TEST OK",
then defaults to a display which shows the Boarding Music channel,
Announcement number and File information.
There are three Selectable Modes:
• ANNC-manual announcement selection mode. To play one or more
manual announcements, press the ANNC button.The ANNC button
illuminates and an announcement prompt appears on the LCD.
•To play a single announcement, enter the three digit code for the
desired announcement. The LCD displays the selected announcement
number, the announcement title and prompts the operator for
confirmation. If the entry is correct, press the ENT button. Press the
START button to initiate announcement playback.
•To play multiple announcements in a series, enter the first
announcement number, following the steps for a single
announcement, up to and including pressing the ENT button, but do
not press the START button. Press ENT again to enter the next
announcement number. Repeat this process to enter a maximum of 9
announcements. Each announcement is stored in memory in the order
it was selected. After all desired announcements have been entered,
press the START button to initiate announcement playback.
March 1, 2021