Domestic vs. International Final Reserve?

[lutz]

Hi-
has anybody ever heard about a regulation requiring different final reserve (45 minutes vs. 30 minutes @ 1500ft AGL) for domestic vs. international flights? Or if not a regulation, any good reason why an operator would want that?

Thanks!

[mutt]

Yep it exists in FAA land, 45 minutes domestic, or 30 mins international with 10% (or 5% on approval) contingency fuel.

Mutt

[lutz]

Thanks for your reply! What I found in Part 121 operating requirements is 30 minutes 1.500 feet @ holding fuel flow for international (§ 121.645) and 45 minutes @ normal cruising fuel consumption (§ 121.639) for domestic. All for turbo powered aircraft. Is that what you're refering to?

[mutt]

YEP..... dont forget (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;

Mutt

[galaxy flyer]

And, I believe, the 45 minutes is at holding speed at 10,000 feet, which brings the two numbers pretty close.

GF

[mutt]

I believe, the 45 minutes is at holding speed at 10,000 feet,

Its at normal cruising fuel consumption, so we use 290-350 depending on the aircraft.

Mutt