MULTI PHASE
46 NAVIGATION management & monitoring
Accuracy switching HIGH to LOW triggers "NAV ACCUR DOWNGRAD"
message (amber) on MCDU and on ND on the affected side. This
message can be cleared on both MCDU and ND.
When accuracy becomes HIGH again "NAV ACCUR UPGRAD" message
(white) on MCDU scratchpad and on ND is triggered.
See also PART II: Ch.7.4 – Approach.
Refer to Operator’s SOPs when ACCUR is LOW for applicable
procedures and limitations.
GPS A/C
If ACCUR becomes LOW, "GPS PRIMARY LOST" s-pad msg (amber) is
displayed.
This situation should occur in exceptional cases or after a wrong
MANUAL UPDATE.
EPE is defaulted at 0.2 NM at IRS alignment.
CRUISE THV001
CRZ OPT REC MAX
FL360 FL361 FL389
<REPORT
UPDATE AT
*[ ]
BRG /DIST
356° /337.4 TO EGLL27R
REQUIRED ACCUR ESTIMATED
2.0NM LOW 4.9NM
NAV ACCUR DOWNGRAD
NAV ACCUR DOWNGRAD
CRUISE THV001
CRZ OPT REC MAX
FL360 FL361 FL389
<REPORT
UPDATE AT
*[ ]
BRG /DIST
356° /337.4 TO EGLL27R
REQUIRED ACCUR ESTIMATED
2.0NM HIGH 1.9NM
NAV ACCUR UPGRAD
NAV ACCUR UPGRAD
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
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