LHR transition altitude : when to switch from QNH to 29.92" / 1013 mb
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LHR transition altitude : when to switch from QNH to 29.92" / 1013 mb
On the SID charts, transition altitude is published as 6000 ft.
If climbing through 3000 ft. and cleared to FL 100, is the switch from QNH to 29.92 in / 1013 mb made at that moment
or
climbing through 6000 ft. ?
If subsequently told to stop climb at 5000 ft., I presume you must reset QNH ?
Got a link to the procedure ?
If climbing through 3000 ft. and cleared to FL 100, is the switch from QNH to 29.92 in / 1013 mb made at that moment
or
climbing through 6000 ft. ?
If subsequently told to stop climb at 5000 ft., I presume you must reset QNH ?
Got a link to the procedure ?
Spink Pots
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As soon as you are cleared to a flight level you change to 1013mb. If you are subsequently told to stop at an altitude, you reset the QNH.
When cleared from an altitude to a flight level, do not wait until you pass the transition altitude before changing to 1013mb. It's asking for trouble.
When cleared from an altitude to a flight level, do not wait until you pass the transition altitude before changing to 1013mb. It's asking for trouble.
Per Ardua ad Astraeus
Join Date: Mar 2000
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UK AIP:
5.1.4
Within Controlled Airspace a pilot should set one altimeter to the latest Aerodrome QNH prior to take-off. While flying at, or below, the Transition Altitude vertical position will be expressed in terms of altitude based upon the Aerodrome QNH. When cleared for climb to a Flight Level, vertical position will be expressed in terms of Flight Level, unless intermediate altitude reports have been specifically requested by Air Traffic Control.
My bolding
5.1.4
Within Controlled Airspace a pilot should set one altimeter to the latest Aerodrome QNH prior to take-off. While flying at, or below, the Transition Altitude vertical position will be expressed in terms of altitude based upon the Aerodrome QNH. When cleared for climb to a Flight Level, vertical position will be expressed in terms of Flight Level, unless intermediate altitude reports have been specifically requested by Air Traffic Control.
My bolding
Join Date: Jun 2000
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Gender Faculty Specialist
ab33t,
Please tell me that you weren't seriously endorsing one of the most stupid suggestions that I have ever heard.
We never fly around with two different subscale settings on the main altimeters. We leave the standby on the QNH until we enter RVSM airspace and then that is set to standard aswell.
You are an altitude bust waiting to happen.
Tick tock...
Please tell me that you weren't seriously endorsing one of the most stupid suggestions that I have ever heard.
We never fly around with two different subscale settings on the main altimeters. We leave the standby on the QNH until we enter RVSM airspace and then that is set to standard aswell.
You are an altitude bust waiting to happen.
Tick tock...
