Investigation: Final reserve fuel according to Part 121.645??
Thread Starter
Join Date: Jun 2016
Location: Denmark
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Investigation: Final reserve fuel according to Part 121.645??
Hello all,
I am working for a european company and are trying to figure out the FAA part 121 fuel regulations.
I am trying to investigate the terminology behind following rules taken from part 121.639 & Part 121.645.
§121.639 Fuel supply: All domestic operations.
No person may dispatch or take off an airplane unless it has enough fuel—
(a) To fly to the airport to which it is dispatched;
(b) Thereafter, to fly to and land at the most distant alternate airport (where required) for the airport to which dispatched; and
(c) Thereafter, to fly for 45 minutes at normal cruising fuel consumption or, for certificate holders who are authorized to conduct day VFR operations in their operations specifications and who are operating nontransport category airplanes type certificated after December 31, 1964, to fly for 30 minutes at normal cruising fuel consumption for day VFR operations.
The regulation it self is easy to ready.. However am I correctly assuming that the 45 Minutes are considered as the “Final Reserve” fuel ?
Am I then correctly also assuming that if an operator brings the absolute minimum fuel for a domestic flight with no alternate aerodrome they are required to state an emergency, or are they allowed to use the 45Minutes of fuel?
Second question is regarding this regulation:
§121.645 Fuel supply: Turbine-engine powered airplanes, other than turbo propeller: Flag and supplemental operations.
(a) Any flag operation within the 48 contiguous United States and the District of Columbia may use the fuel requirements of §121.639.
(b) For any certificate holder conducting flag or supplemental operations outside the 48 contiguous United States and the District of Columbia, unless authorized by the Administrator in the operations specifications, no person may release for flight or takeoff a turbine-engine powered airplane (other than a turbo-propeller powered airplane) unless, considering wind and other weather conditions expected, it has enough fuel—
(1) To fly to and land at the airport to which it is released;
(2) After that, to fly for a period of 10 percent of the total time required to fly from the airport of departure to, and land at, the airport to which it was released;
(3) After that, to fly to and land at the most distant alternate airport specified in the flight release, if an alternate is required; and
(4) After that, to fly for 30 minutes at holding speed at 1,500 feet above the alternate airport (or the destination airport if no alternate is required) under standard temperature conditions.
(c) No person may release a turbine-engine powered airplane (other than a turbo-propeller airplane) to an airport for which an alternate is not specified under §121.621(a)(2) or §121.623(b) unless it has enough fuel, considering wind and other weather conditions expected, to fly to that airport and thereafter to fly for at least two hours at normal cruising fuel consumption.
(d) The Administrator may amend the operations specifications of a certificate holder conducting flag or supplemental operations to require more fuel than any of the minimums stated in paragraph (a) or (b) of this section if he finds that additional fuel is necessary on a particular route in the interest of safety.
(e) For a supplemental operation within the 48 contiguous States and the District of Columbia with a turbine engine powered airplane the fuel requirements of §121.643 apply.
My question here relates to the 30 minutes written under 121.645 (b) (3).
What is the correct terminology for this fuel?? .. Is it considered as “Holding Fuel” or “Final Reserve Fuel”?
I have an operator who want this fuel to be shown as “Holding Fuel”.
I understand the 30 Minutes are for holding speed in 1500ft, but never the less, I still consider if this should be taken as the “Final Reserve Fuel”?
If this is not considered as Final Reserve Fuel, then what is? .. Is it the 10 percent?
Thank you for your answers.
I am working for a european company and are trying to figure out the FAA part 121 fuel regulations.
I am trying to investigate the terminology behind following rules taken from part 121.639 & Part 121.645.
§121.639 Fuel supply: All domestic operations.
No person may dispatch or take off an airplane unless it has enough fuel—
(a) To fly to the airport to which it is dispatched;
(b) Thereafter, to fly to and land at the most distant alternate airport (where required) for the airport to which dispatched; and
(c) Thereafter, to fly for 45 minutes at normal cruising fuel consumption or, for certificate holders who are authorized to conduct day VFR operations in their operations specifications and who are operating nontransport category airplanes type certificated after December 31, 1964, to fly for 30 minutes at normal cruising fuel consumption for day VFR operations.
The regulation it self is easy to ready.. However am I correctly assuming that the 45 Minutes are considered as the “Final Reserve” fuel ?
Am I then correctly also assuming that if an operator brings the absolute minimum fuel for a domestic flight with no alternate aerodrome they are required to state an emergency, or are they allowed to use the 45Minutes of fuel?
Second question is regarding this regulation:
§121.645 Fuel supply: Turbine-engine powered airplanes, other than turbo propeller: Flag and supplemental operations.
(a) Any flag operation within the 48 contiguous United States and the District of Columbia may use the fuel requirements of §121.639.
(b) For any certificate holder conducting flag or supplemental operations outside the 48 contiguous United States and the District of Columbia, unless authorized by the Administrator in the operations specifications, no person may release for flight or takeoff a turbine-engine powered airplane (other than a turbo-propeller powered airplane) unless, considering wind and other weather conditions expected, it has enough fuel—
(1) To fly to and land at the airport to which it is released;
(2) After that, to fly for a period of 10 percent of the total time required to fly from the airport of departure to, and land at, the airport to which it was released;
(3) After that, to fly to and land at the most distant alternate airport specified in the flight release, if an alternate is required; and
(4) After that, to fly for 30 minutes at holding speed at 1,500 feet above the alternate airport (or the destination airport if no alternate is required) under standard temperature conditions.
(c) No person may release a turbine-engine powered airplane (other than a turbo-propeller airplane) to an airport for which an alternate is not specified under §121.621(a)(2) or §121.623(b) unless it has enough fuel, considering wind and other weather conditions expected, to fly to that airport and thereafter to fly for at least two hours at normal cruising fuel consumption.
(d) The Administrator may amend the operations specifications of a certificate holder conducting flag or supplemental operations to require more fuel than any of the minimums stated in paragraph (a) or (b) of this section if he finds that additional fuel is necessary on a particular route in the interest of safety.
(e) For a supplemental operation within the 48 contiguous States and the District of Columbia with a turbine engine powered airplane the fuel requirements of §121.643 apply.
My question here relates to the 30 minutes written under 121.645 (b) (3).
What is the correct terminology for this fuel?? .. Is it considered as “Holding Fuel” or “Final Reserve Fuel”?
I have an operator who want this fuel to be shown as “Holding Fuel”.
I understand the 30 Minutes are for holding speed in 1500ft, but never the less, I still consider if this should be taken as the “Final Reserve Fuel”?
If this is not considered as Final Reserve Fuel, then what is? .. Is it the 10 percent?
Thank you for your answers.
