979 

Federal Aviation Administration, DOT 

Pt. 36, App. J 

Reference Procedures) and section K7 (Test 
Procedures) of this appendix: 

(a) 

Takeoff reference noise measurement 

points— 

As shown in Figure K1 below: 
(1) The centerline noise measurement 

flight path reference point, designated A, is 
located on the ground vertically below the 
reference takeoff flight path. The measure-
ment point is located 1,640 feet (500 m) in the 
horizontal direction of flight from the point 

Cr where transition to climbing flight is ini-
tiated, as described in section K6.2 of this ap-
pendix; 

(2) Two sideline noise measurement points, 

designated as S(starboard) and S(port), are 
located on the ground perpendicular to and 
symmetrically stationed at 492 feet (150 m) 
on each side of the takeoff reference flight 
path. The measurement points bisect the 
centerline flight path reference point A. 

(b) 

Flyover reference noise measurement 

points— 

As shown in Figure K2 below: 
(1) The centerline noise measurement 

flight path reference point, designated A, is 

located on the ground 492 feet (150 m) 
vertically below the reference flyover flight 
path. The measurement point is defined by 
the flyover reference procedure in section 
K6.3 of this appendix; 

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