Fuel Freezing Temperature Question
Interesting reading, coldest ground temp, i've ever flown in was -48c. was colder at altitude w/ a density altitude at t/o of -7000' had the heater go u/s with an hour to go, had to be lifted out of the cockpit! http://www.boeing.com/commercial/aer...lar_story.html
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A320
In the Fcom you'll only find thatSome of the fuel supplied to each engine goes from the high-pressure fuel line in that engine, through the integrated drive generator (IDG) heat exchanger (where it absorbs heat), to the fuel return valve, and back to the wing tank.This is to serve cooling the IDG.
Recirculation of fuel to the fuel tanks according to the engine oil temperature, the fuel system configuration and the flight phase
In the old generation Aircraft like the B727 For example you had fuel heater switches.
Recirculation of fuel to the fuel tanks according to the engine oil temperature, the fuel system configuration and the flight phase
In the old generation Aircraft like the B727 For example you had fuel heater switches.
Last edited by Johnman; 14th Sep 2007 at 00:03.
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Respect your Limitations!
We operated a nightly round trip from central Europe to Yerevan, Armenia (EVN/UDYZ) in fall 2005. SATs were around -70°C to -71°C (at FL350 if memory serves me right).
Due to fuel shortage we departed home base with a full load of fuel (19,3 to) on a lightly loaded A319. Shortly prior to TOD we got the Advisory Condition that the left outer tank was at -41°C. So we descended just a couple of minutes earlier.
During tournaround we uplifted only about 3,500 kgs so trouble came back about an hour after reaching cruising altitude. Lower levels were all blocked an Rostov ATC was not really cooperative (probably not understandig WHY we wanted to descend).
So we contacted our trouble-shooters (engineering dept) via acars and asked if there were any objections against opening the fuel x-fer valves to mix the 2x 700 kgs outer tank fuel with the significantly warmer inner tank fuel. They gave us the go-ahead which saved the poor controller a mayday-call and an unapproved descend, which we would have done at -44°C in any tank, as our book gives a Limitation to keep fuel temp 3 degs above freezing point.
Good Thing about the Wing A/I, never thougt about it. Maybe switching on some ovens in the galleys might work as well.
Regards, MAX
Due to fuel shortage we departed home base with a full load of fuel (19,3 to) on a lightly loaded A319. Shortly prior to TOD we got the Advisory Condition that the left outer tank was at -41°C. So we descended just a couple of minutes earlier.
During tournaround we uplifted only about 3,500 kgs so trouble came back about an hour after reaching cruising altitude. Lower levels were all blocked an Rostov ATC was not really cooperative (probably not understandig WHY we wanted to descend).
So we contacted our trouble-shooters (engineering dept) via acars and asked if there were any objections against opening the fuel x-fer valves to mix the 2x 700 kgs outer tank fuel with the significantly warmer inner tank fuel. They gave us the go-ahead which saved the poor controller a mayday-call and an unapproved descend, which we would have done at -44°C in any tank, as our book gives a Limitation to keep fuel temp 3 degs above freezing point.
Good Thing about the Wing A/I, never thougt about it. Maybe switching on some ovens in the galleys might work as well.
Regards, MAX
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You said
The information you need is CLEARLY available in FCOM's. Start at 1.28.10 page 6 and keep reading !
I also mentioned that this is very basic stuff covered in the groundschool. If kuwait340 does have an A320 rating he really should know the basics, and at least where to find it in the fcoms.
It is not mentioned in the FCOM
I also mentioned that this is very basic stuff covered in the groundschool. If kuwait340 does have an A320 rating he really should know the basics, and at least where to find it in the fcoms.
Last edited by john_tullamarine; 18th Sep 2007 at 01:46.
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(a) we have two useable choices with inappropriate post content -
(i) ban the user .. usually overkill
(ii) edit the material .. which fixes itinerant problems
(b) time and workload doesn't permit too much in the way of admin niceties like exchanges with individual posters on such matters
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(i) ban the user .. usually overkill
(ii) edit the material .. which fixes itinerant problems
(b) time and workload doesn't permit too much in the way of admin niceties like exchanges with individual posters on such matters
(c) the mods determine whether content is OK or not
.. that's the way life is, I'm afraid ....
JT
