791 

Federal Aviation Administration, DOT 

§ 91.863 

flight and must provide the informa-
tion necessary for the FAA to deter-
mine that the planned flight is within 
the limits prescribed in the law. 

[Doc. No. FAA–2002–12771, 67 FR 46571, July 
15, 2002, as amended by Docket FAA–2015– 
3782, Amdt. 91–349, 82 FR 46132, Oct. 4, 2017] 

§ 91.859

Modification to meet Stage 3, 

Stage 4, or Stage 5 noise levels. 

For an airplane subject to § 91.801(c) 

of this subpart and otherwise prohib-
ited from operation to or from an air-
port in the contiguous United States 
by § 91.855, any person may apply for a 
special flight authorization for that 
airplane to operate in the contiguous 
United States for the purpose of ob-
taining modifications to meet Stage 3, 
Stage 4, or Stage 5 noise levels. 

[Docket FAA–2015–3782, Amdt. 91–349, 82 FR 
46132, Oct. 4, 2017] 

§ 91.861

Base level. 

(a) 

U.S. Operators. 

The base level of a 

U.S. operator is equal to the number of 
owned or leased Stage 2 airplanes sub-
ject to § 91.801(c) of this subpart that 
were listed on that operator’s oper-
ations specifications for operations to 
or from airports in the contiguous 
United States on any one day selected 
by the operator during the period Jan-
uary 1, 1990, through July 1, 1991, plus 
or minus adjustments made pursuant 
to paragraphs (a) (1) and (2). 

(1) The base level of a U.S. operator 

shall be increased by a number equal to 
the total of the following— 

(i) The number of Stage 2 airplanes 

returned to service in the United 
States pursuant to § 91.855(f); 

(ii) The number of Stage 2 airplanes 

purchased pursuant to § 91.855(g); and 

(iii) Any U.S. operator base level ac-

quired with a Stage 2 airplane trans-
ferred from another person under 
§ 91.863. 

(2) The base level of a U.S. operator 

shall be decreased by the amount of 
U.S. operator base level transferred 
with the corresponding number of 
Stage 2 airplanes to another person 
under § 91.863. 

(b) Foreign air carriers. The base 

level of a foreign air carrier is equal to 
the number of owned or leased Stage 2 
airplanes that were listed on that car-
rier’s U.S. operations specifications on 

any one day during the period January 
1, 1990, through July 1, 1991, plus or 
minus any adjustments to the base lev-
els made pursuant to paragraphs (b) (1) 
and (2). 

(1) The base level of a foreign air car-

rier shall be increased by the amount 
of foreign air carrier base level ac-
quired with a Stage 2 airplane from an-
other person under § 91.863. 

(2) The base level of a foreign air car-

rier shall be decreased by the amount 
of foreign air carrier base level trans-
ferred with a Stage 2 airplane to an-
other person under § 91.863. 

(c) New entrants do not have a base 

level. 

[Doc. No. 26433, 56 FR 48659, Sept. 25, 1991; 56 
FR 51167, Oct. 10, 1991] 

§ 91.863

Transfers of Stage 2 airplanes 

with base level. 

(a) Stage 2 airplanes may be trans-

ferred with or without the cor-
responding amount of base level. Base 
level may not be transferred without 
the corresponding number of Stage 2 
airplanes. 

(b) No portion of a U.S. operator’s 

base level established under § 91.861(a) 
may be used for operations by a foreign 
air carrier. No portion of a foreign air 
carrier’s base level established under 
§ 91.861(b) may be used for operations 
by a U.S. operator. 

(c) Whenever a transfer of Stage 2 

airplanes with base level occurs, the 
transferring and acquiring parties 
shall, within 10 days, jointly submit 
written notification of the transfer to 
the FAA, Office of Environment and 
Energy. Such notification shall state: 

(1) The names of the transferring and 

acquiring parties; 

(2) The name, address, and telephone 

number of the individual responsible 
for submitting the notification on be-
half of the transferring and acquiring 
parties; 

(3) The total number of Stage 2 air-

planes transferred, listed by airplane 
type, model, series, and serial number; 

(4) The corresponding amount of base 

level transferred and whether it is U.S. 
operator or foreign air carrier base 
level; and 

(5) The effective date of the trans-

action. 

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