Tiger Airways jet flew 'below safe altitude'
Join Date: Dec 1999
Location: I prefer to remain north of a direct line BNE-ADL
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If you are on the ARBEY ONE STAR RWY 27ALPHA established 083 from Baker to Paula you are PERFECTLY entitled to descend to 2500' and join the 27ILS at 2500'. This applies if you are conducting the ARBEY or WENDY arrival for rwy27.
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Could the FMS have commenced descent to 2000 without any other input from the crew? Looking at the arrival the STAR link up does not take you via EPP but tracks to intercept the LOC. Could the FMS treat the leg as a constant descent/turn and commence descent to intercept the GS at 2000 by 7DME?
So it flies the radius to intercept the LOC, next step in the APP is 2000 at 7DME and the FMS just goes there whilst navigating to intercept.
Possible?
So it flies the radius to intercept the LOC, next step in the APP is 2000 at 7DME and the FMS just goes there whilst navigating to intercept.
Possible?
Could the FMS have commenced descent to 2000 without any other input from the crew?
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From PAULA to EPP is coded in the FMS as +3000. It can be modified to +2500 from the WENDY or ARBEY stars.
Possible causes
A. An inadvertant wrong altitude in the FCU and flying in selected modes which circumvents the protection of a managed altitude constraint, which itself can be wrongly modified, or
B. A handflown mistake, or
C. Inadvertant false GS capture
Others might think of a few more
Possible causes
A. An inadvertant wrong altitude in the FCU and flying in selected modes which circumvents the protection of a managed altitude constraint, which itself can be wrongly modified, or
B. A handflown mistake, or
C. Inadvertant false GS capture
Others might think of a few more
Join Date: Nov 2006
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A/c was between PAULA and EPP. MSA on the STAR is 2500, MVA is 2400.
Kudos to the vigilance of the approach controller - no alarms would have sounded as the a/c had been cleared for the ILS so no "Cleared Level Adherence" warning.
Kudos to the vigilance of the approach controller - no alarms would have sounded as the a/c had been cleared for the ILS so no "Cleared Level Adherence" warning.
Join Date: Sep 2006
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reminds me of a time the controller asked us if we would like to come inside Paula, some one asked if they could they could have a look first, general noise on the radio lasted a while, the whole star was flown
Kudos to the vigilance of the approach controller - no alarms would have sounded as the a/c had been cleared for the ILS so no "Cleared Level Adherence" warning.
PS: Good call by App.
