SUPPLEMENT 4
PRIMUS EPIC - FLIGHT
MANAGEMENT SYSTEM
AIRPLANE
F
LIGHT
S4-10 ANAC APPROVED
Page 14 code 01 REVISION 15
Copyright © by Embraer. Refer to cover page for details.
If the EPU is greater than the active RNP for a set period of time
(determined by phase of flight), the FMS will provide an alert (DGRAD
on the PFD and UNABLE RNP on the MCDU scratchpad) to notify the
crew that the system does not have the necessary accuracy or integrity
to maintain RNP operations for the current RNP type. The following
table describes the relationship between phase of flight and the time to
alarm.
Flight Phase
Time to
Alarm (sec)
Remote/Oceanic 54
En-route 24
Terminal 6
Approach 6
Refer to the ABNORMAL PROCEDURES section of this manual
supplement for details regarding procedures for degraded navigation.
The FMS also provides annunciations to alert the crew of an inability to
meet the RNP for future flight plan legs. Refer to the Honeywell Primus
Epic FMS Pilot’s Operating Manual for further details regarding system
features and annunciations.
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