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Winter Ops Quesiton

Old 12-04-2016 | 04:46 PM
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Default Winter Ops Quesiton

ATTEN Mods. I am posting this here to get more visibility for pilots who would know the answer.

In regards to Cold Weather Restricted Airport procedures as outlined in AIM 7-2-3 and NOTAM GEN16001, what is an approved method for interpolation?

For example, runway 15 into KBTV. When crossing FOVES (the FAF) outbound prior to beginning the procedure turn, the minimum altitude is 2,400 ft MSL which is 2,065 ft above the airport. The altimeter correction table in AIM 7-2-3 only has options for 2,000 feet or 3,000 feet above the airport. Does anyone know what the FAA wants us to use? I know that the most conservative option is to use the 3,000 ft column, but that seems extreme for only being slightly above the 2,000 ft column.
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Old 12-05-2016 | 08:54 AM
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Originally Posted by 2StgTurbine
ATTEN Mods. I am posting this here to get more visibility for pilots who would know the answer.

In regards to Cold Weather Restricted Airport procedures as outlined in AIM 7-2-3 and NOTAM GEN16001, what is an approved method for interpolation?

For example, runway 15 into KBTV. When crossing FOVES (the FAF) outbound prior to beginning the procedure turn, the minimum altitude is 2,400 ft MSL which is 2,065 ft above the airport. The altimeter correction table in AIM 7-2-3 only has options for 2,000 feet or 3,000 feet above the airport. Does anyone know what the FAA wants us to use? I know that the most conservative option is to use the 3,000 ft column, but that seems extreme for only being slightly above the 2,000 ft column.
Lots of great information/discussion here:

http://forums.*************.com/showthread.php?111215-Cold-Temperature-Restricted-Airports

http://forums.*************.com/showthread.php?100456-Cold-Temperature-Restricted-Airports-Mandatory-Compliance-Is-Coming


http://forums.*************.com/showthread.php?94730-Mandatory-Cold-Temperature-Compensation
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Old 12-05-2016 | 09:01 AM
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This might sound stupid, but do you have the Temp Comp function on your FMS? Makes the dissemination of numbers monumentally easier.....
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Old 12-05-2016 | 12:08 PM
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Originally Posted by BPWI
This might sound stupid, but do you have the Temp Comp function on your FMS? Makes the dissemination of numbers monumentally easier.....
Nope. Just one of those crappy FMS units that they only charge $90,000 for.
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Old 12-05-2016 | 06:24 PM
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BPWI,

I suspect only Bombardier has temp comp in the FMS, haven't seen it even on the B777.

GF
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Old 12-06-2016 | 04:27 AM
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Originally Posted by galaxy flyer
BPWI,



I suspect only Bombardier has temp comp in the FMS, haven't seen it even on the B777.



GF


That's interesting. The E170/175 has that capability.


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Old 12-06-2016 | 07:39 AM
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Suggest linear interpolation.
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Old 12-06-2016 | 11:32 AM
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Originally Posted by galaxy flyer
BPWI,

I suspect only Bombardier has temp comp in the FMS, haven't seen it even on the B777.

GF
The OP didn't state what he was flying, but it's surprising to me that any corporate aircraft over a useful range of 5k didn't inherit that function. Only had to use it a handful of times, but sure is handy when needed.
Learning something new everyday-
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Old 12-06-2016 | 12:03 PM
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Originally Posted by galaxy flyer
BPWI,



I suspect only Bombardier has temp comp in the FMS, haven't seen it even on the B777.



GF


Most Gulfstreams have this feature.


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Old 12-06-2016 | 05:28 PM
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Originally Posted by galaxy flyer
BPWI,

I suspect only Bombardier has temp comp in the FMS, haven't seen it even on the B777.

GF
It's been in the Falcon 900LX since 2012. It's also in our G650's. I'm sure it's in a lot of business aircraft.
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