Originally Posted by
gipsymagpie
hi
So I can explain both.
The pilot problem is a limitation from teh Bell 412 RFM Cat A supplement. It states:
Minimum crew for Category A elevated helipad operation consists of two pilots.
So not a regulation but rather a limitation of the aircraft.
The limitation about 24 degrees needs to be viewed in context. In this instance it's actually no landings above 24 degrees and in cities (congested areas). It is also specific to Madrid which is at 2000 ft elevation. In order to fly to a helipad in a hostile congested area (Madrid) at that elevation and temperature, the performance graph gives a maximum mass of 2300kg. This is a whole 550 kg below max mass for an A109E. That's not a practical figure to do anything useful in HEMS.
Hope that helps.
G
Thanks for your reply.
Interesting the fact that the B412 RFM does not allow one pilot to perform a CAT-A takeoff from an elevated helideck. What makes it different from a street level helipad or any accident site like a factory where HEMS should be required to land and then takeoff from?
About the A109E 24ºC limitation, is it told by the RFM as well and applies worldwide?