above the EICAS N1 indicator. An aural (voice
message) warning, stating “LEFT/RIGHT
REVERSER UNSAFE”, will also be an-
nounced to the crew over the audio warning
system. The voice message will continue to re-
play until canceled by the pilot, or the condi-
tion is no longer valid. This annunciation will
display if an unlock signal is received from two
unlock switches inflight (Figure 7-27).
A white “L or R REV FAULT” message is dis-
played on the CAS for any of the following ab-
normal conditions:
• The squat switch input to the thrust re-
verser ECU has failed.
• A full deploy has been detected without
hydraulic pressure.
• A full deploy has been detected without
an unlock command.
• A full deploy has been detected without
a deploy command.
• ECU power fail
The “L or R REV FAULT” CAS message may
be accompanied by a red “DEP” or “UNL” EI.
Normal indications are a white “REV” display
which means that the reverser is armed on the
ground (the isolation valve is open and hy-
draulic pressure is available up to the control
valve). When deploy is commanded the amber
UNL annunciators will be on momentarily
during deployment. When the thrust reversers
are fully deployed, a green “DEP” will an-
nunciate above each N1 indicator (Figure 7-
27). A time delay in the master caution system
will normally prevent the master caution light
from activating during the short time the UNL
annunciators are on.
LEARJET 45 PILOT TRAINING MANUAL
7-36
FOR TRAINING PURPOSES ONLY
FlightSafety
international
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