Nav Accur Downgrad - Thales FMGS Pilot's Manual

FMS DEGRADED OPERATION
6 OTHER DEGRADED OPERATIONS

NAV ACCUR DOWNGRAD

Accuracy can be monitored on PROG
page.
When EPE (ESTIMATED value)
becomes above the REQUIRED value,
NAV ACCURACY DOWNGRAD message
(white) is displayed on scratchpad.
On ND message is displayed in amber.
These messages can be cleared by
pilot.
PROG page ...................Select
Check accuracy.
Consider adequate navigation
procedures.
When accuracy improves to the
required value NAV ACCURACY
UPGRAD message is displayed on
MCDUs and NDs.
J43126AA 00
CRZ
-----
<REPORT
UPDATE AT
*[
BRG /DIST
302° /23.5
PREDICTIVE
<GPS
REQUIRED ACCUR ESTIMATED
1.0NM
NAV ACCURACY DOWNGRAD
CRZ
-----
<REPORT
UPDATE AT
*[
BRG /DIST
302° /23.5
PREDICTIVE
<GPS
REQUIRED ACCUR ESTIMATED
1.0NM
NAV ACCURACY UPGRAD
© THALES AVIONICS S.A.
DESCENT THV001
OPT REC MAX
----- FL398
VDEV=- 350
]
TO EGLL27R
LOW 1.28NM
NAV ACCURACY DOWNGRAD
DESCENT THV001
OPT REC MAX
----- FL398
VDEV=- 350
]
TO EGLL27R
HIGH 0.92NM
NAV ACCURACY UPGRAD
AIRBUS A318/319/320/321
FT
FT