Question on FLS on Airbus A320 aircraft
A320 Pilots, Hello!
When flying non precision RNP APP using FLS outside of temperature range published on chart, do we need to correct minimums and which minimums to use? (LPV, LNAV/VNAV or LNAV) Or let's say even in the published range, chart says BARO-VNAV not authorized below -45°c, do we need to correct minima Thank you |
Assuming A 320 FLS is same as A 350 (which is very likely)
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Originally Posted by JABBARA
(Post 11433891)
Assuming A 320 FLS is same as A 350 (which is very likely)
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JABBARA It absolutly make sence you comment. In 737 we have to fly LNAV/VNAV whitin temperature range withou any temperature correction, but if we are outsinde limmit we have to fly LNAV with correction to IAF ,IF,FAF and DA/MDA, holding , MSA. But I have a question regarding first par of martin2304 using FLS, when on RNP chart is depicted LPV, LNAV/VNAV, LNAV minimums which one you pick up?...As far as I remember in LNA/VNAV DA is constructed for minimum possible temperature in order to avoid obstacles so in this case applying correstion is not necessary. On the other hand in charts there are notes that for high temperatures GP may much more higher comare to isa deviation GP shoving in FMS/MCDU.
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SamuelCV
JABBARA It absolutly make sence you comment. In 737 we have to fly LNAV/VNAV whitin temperature range withou any temperature correction, but if we are outsinde limmit we have to fly LNAV with correction to IAF ,IF,FAF and DA/MDA, holding , MSA. But I have a question regarding first par of martin2304 using FLS, when on RNP chart is depicted LPV, LNAV/VNAV, LNAV minimums which one you pick up?...As far as I remember in LNA/VNAV DA is constructed for minimum possible temperature in order to avoid obstacles so in this case applying correstion is not necessary. On the other hand in charts there are notes that for high temperatures GP may much more higher co
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Simply said ,I kow that LPV is SBAS in which "VNAV" GP is corrected by GPS, but FLS is as well compensated and did the same job in final approach segment using avionc correction of GP. If in DOC 8168 is clearly statet which minimums in this case I must use I will check it. Thanks for your effort JABBARA
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To my knowledge, you still have to select LNAV/VNAV minima, as the LPV is a different kind of approach, for which you need to have certain equipment(in this case, SBAS) and certain certifications/authorizations from the regulator that the A320. Even if the A320 onboard navigations systems are as precise as those in LPV approved aircraft, you're still legally restricted to LNAV/VNAV. Maybe in the future Airbus incorporates this requirements and thus A320s will be able to perfomr LPV approaches.
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