B737 Fuel Penalty for Non-Normals
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Join Date: Jan 2002
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B737 Fuel Penalty for Non-Normals
Hi,
I'm reviewing my Fuel chapter, fuel policy etc...
I found some of my old material stating fuel penalties for non-normals, but I'm not very sure about the numbers..
* Flight with gear down: +50% (only for on the spot estimate, real numbers can be found in QRH)
* What about Fuel Consumption with Flaps extended, e.g. Diversion with Flaps problem, Flaps stuck at 1, 5, 10, ...? In the past I oted 10% or 75kg/hr, but I can't remember with which flaps setting these are, or for which variant (200? 300? 700?)
Anyone?
Thanks,
FT
I'm reviewing my Fuel chapter, fuel policy etc...
I found some of my old material stating fuel penalties for non-normals, but I'm not very sure about the numbers..
* Flight with gear down: +50% (only for on the spot estimate, real numbers can be found in QRH)
* What about Fuel Consumption with Flaps extended, e.g. Diversion with Flaps problem, Flaps stuck at 1, 5, 10, ...? In the past I oted 10% or 75kg/hr, but I can't remember with which flaps setting these are, or for which variant (200? 300? 700?)
Anyone?
Thanks,
FT
Join Date: Apr 2003
Location: France
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A partial answer only:
- The Flight crew training manual (FCTM) says in chapt 4.1 that FF during holding with flap 1 is aproximately 10% more than with flap up
- the Flight planning & performance manual (FPPM) says in the intro of the chapter 2 that during descent each additional minute of flap down consumes about 75 kg of additional fuel (gear retracted!)
I know different company or pilot's notes state that the fuel burn with LE extended is increased by about 10% but I can not find it back in my boeing official docs.
Pls keep me advised if you get more
regards
- The Flight crew training manual (FCTM) says in chapt 4.1 that FF during holding with flap 1 is aproximately 10% more than with flap up
- the Flight planning & performance manual (FPPM) says in the intro of the chapter 2 that during descent each additional minute of flap down consumes about 75 kg of additional fuel (gear retracted!)
I know different company or pilot's notes state that the fuel burn with LE extended is increased by about 10% but I can not find it back in my boeing official docs.
Pls keep me advised if you get more
regards
Join Date: Dec 2001
Location: Beds
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I once had to operate a gear down ferry and remember the aircraft drank fuel like it was going out of fashion. I recall there were no figures for the descent; we had to decline descent at the usual 3 degree point to avoid a high penalty.
Confused everybody I recall . . .
Confused everybody I recall . . .