View Full Version : AFE vs Flight Level
B737NG_Pilot
22nd Oct 2013, 07:43
A Quick doubt between AFE & Flight Level.
An airport with a field elevation of 4000' has a Transition Altitude of 8000'. You are 10,000 FT AFE when
a) The Altimeter indicates 10,000 (QNH: STD).
b) The Altimeter indicates 14,000 (QNH: STD).
RR Driver
22nd Oct 2013, 09:21
B the transition altitude has no relevance unless you set 1013. Thus to be 10000 aal if the elevation is 4000 above sea level you need to be 14000 with qnh set.
What a dreadfully worded question!! Why would the altimeter be on 'QNH STD' and what does that mean?I assume the question means aerodrome QNH is 'ICAO' - 1013.23/29.92? Why not say so?? Who on earth writes these?
RR - "the transition altitude has no relevance unless you set 1013 (and you will!). Thus to be 10000 aal if the elevation is 4000 above sea level you need to be 14000 with 1013 or29.92 set. NB Pedantic hat on - you should NOT be (level) on 'QNH' at 14,000ft indicated with a TA of 8!
B737NG_Pilot
22nd Oct 2013, 11:40
Sorry, I realise the typo.
An airport with a field elevation of 4000' has a Transition Altitude of 8000'. You are 10,000 FT AFE when
a) The Altimeter indicates 10,000 (Altimeter Setting: 1013).
b) The Altimeter indicates 14,000 (Altimeter Setting: 1013).
The only possible answer is b, but it does require the sea level pressure to be 1013 as well which is not stated. BAD question as I said.
de facto
22nd Oct 2013, 12:50
Lets create a "bad question" forum:p
dixi188
23rd Oct 2013, 12:59
If you are a "B737NG Pilot" it is a bit of a worry that you are asking this question.
Remember this is PPRune - 'appearances' can be deceptive.......................wait until SSG pitches up.:eek: