Posts about: "IFR" [Posts: 101 Page: 6 of 6]ΒΆ

ATC Watcher
February 18, 2026, 16:22:00 GMT
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Post: 12039242
The 100ft in the altimeter is within IFR tolerance , not really the point here , yes you should check against elevation airfield before start , but we learn there is a small discrepancy when on the ground and when the rotor blows over the static holes, and ATC will check again in flight the alt against mode C, it is mandatory on first contact with ATC , but mode C is calibrated on 1013 not QNH , anyway not the major cause here, just another hole on the cheese that night .

As to the lack of experience of the PF , I think 56 h of flying visual and manual an helicopter is significantly more important experience wise that the same number on say, a 747 .I also do not think this was factor.
The reasons and direct causes of this accident are within the 50 NTSB recommendations , not in the altimeter or experience of the PF , unless she had a couple of close calls herself doing visual separation at night before and did not learn from that.

Last edited by ATC Watcher; 18th February 2026 at 16:35 .

Subjects ATC  Altimeter (All)  Close Calls  IFR  NTSB  QNH  Separation (ALL)  Visual Separation

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