Rmu Cross-Side Operation; Rmu Backup Pages - BOMBARDIER LEARJET 40 Pilot's Manual

Pilot's Manual
RMUs each have a primary and a secondary power source. If the pri-
mary source is not available, the RMU will automatically switch to the
secondary power source. RMU #1 primary is powered from the left
essential bus, and RMU #1 secondary is powered from EMER BATT
bus. RMU #2 primary is powered from right main avionics bus and the
secondary from the right essential bus. RMU #1 and RMU #2 primary
and secondary circuit breakers are located in the COMMUNICATIONS
group on the pilot's and copilot's circuit breaker panels. RMU #2
primary is the only power source affected by the avionics master.

RMU CROSS-SIDE OPERATION

Should the pilot decide to tune the copilot's set of radios, he can push
the 1/2 function key and transfer his entire RMU display and operation
to the copilot's #2 system. Both RMU displays will be identical;
however the pilot's RMU will show the function legends on the main
tuning and memory pages in magenta to indicate that cross-control is
being exercised. In addition to having access to the #2 system, the pilot
still has the memory frequencies in their #1 RMU available for recall for
use with the #2 system. Both pilots have this control transfer function
available. It provides flexibility in crew coordinated tuning as well as a
backup mode in the event one RMU becomes inoperative. The pilot
may change any frequency or mode on the copilot's system using the
pilot side RMU. Any changed frequency is annunciated in yellow on
the copilot's RMU. The frequency will be white on the pilot's RMU. If
the pilot should push the 1/2 key again, the pilot's side RMU will
revert to the original display.

RMU BACKUP PAGES

Either RMU can provide two pages of backup engine and systems indi-
cation and one page for a backup navigation display. These backup dis-
plays can be selected on the PAGE MENU page of either RMU. The
backup engine and systems pages can be selected by depressing the
line select key adjacent to "ENGINE PG1" or "ENGINE PG2" on the
PAGE MENU page. The backup navigation display is accessed by de-
pressing the line select key adjacent to "NAVIGATION" on the PAGE
MENU page.
The ENGINE PG1 and ENGINE PG2 contain information such as: ITT,
O/P (oil pressure, left and right), FUEL, HYDM-B (hydraulic pres-
sure), N
, N , OIL ° C, FF PPH (fuel flow pounds per hour), VOLTS,
1 2
EMER VOLTS, AMPS, OXY, SAT (oxygen quantity and static air temp),
TRIM-PIT, AIL, and RUD (pitch, aileron and rudder trim).
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PM-132A