Some folks think that they can legally fly at 115% gross weight in Alaska. Well sometimes... but not as part 91 general aviation. The regs are somewhat restrictive.
§ 91.323 Increased maximum certificated
weights for certain airplanes
operated in Alaska.
(a) Notwithstanding any other provision
of the Federal Aviation Regulations,
the Administrator will approve,
as provided in this section, an increase
in the maximum certificated weight of
an airplane type certificated under
Aeronautics Bulletin No. 7–A of the
U.S. Department of Commerce dated
January 1, 1931, as amended, or under
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§ 91.325 14 CFR Ch. I (1–1–05 Edition)
the normal category of part 4a of the
former Civil Air Regulations (14 CFR
part 4a, 1964 ed.) if that airplane is operated
in the State of Alaska by—
(1) A certificate holder conducting
operations under part 121 or part 135 of
this chapter; or
(2) The U.S. Department of Interior
in conducting its game and fish law enforcement
activities or its management,
fire detection, and fire suppression
activities concerning public lands.
(b) The maximum certificated weight
approved under this section may not
(1) 12,500 pounds;
(2) 115 percent of the maximum
weight listed in the FAA aircraft specifications;
(3) The weight at which the airplane
meets the positive maneuvering load
factor requirement for the normal category
specified in § 23.337 of this chapter;
(4) The weight at which the airplane
meets the climb performance requirements
under which it was type certificated.
(c) In determining the maximum certificated
weight, the Administrator
considers the structural soundness of
the airplane and the terrain to be traversed.
(d) The maximum certificated weight
determined under this section is added
to the airplane’s operation limitations
and is identified as the maximum
weight authorized for operations within
the State of Alaska.
[Doc. No. 18334, 54 FR 34308, Aug. 18, 1989;
Amdt. 91–211, 54 FR 41211, Oct. 5, 1989, as
amended by Amdt. 91–253, 62 FR 13253, Mar.