361 

Federal Aviation Administration, DOT 

Pt. 60, App. C 

(1) Static helicopter dimen-

sions as follows: 

(i) Horizontal and vertical dis-

tance from main landing 
gear (MLG) to glideslope 
reception antenna. 

(ii) Horizontal and vertical dis-

tance from MLG to pilot’s 
eyepoint. 

(iii) Static flight deck cutoff 

angle. 

(2) Approach data as follows: 
(i) Identification of runway. 
(ii) Horizontal distance from 

runway threshold to 
glideslope intercept with 
runway. 

(iii) Glideslope angle. 
(iv) Helicopter pitch angle on 

approach. 

(3) Helicopter data for man-

ual testing: 

(i) Gross weight. 
(ii) Helicopter configuration. 
(iii) Approach airspeed. 
If non-homogenous fog is 

used to obscure visibility, 
the vertical variation in hor-
izontal visibility must be de-
scribed and be included in 
the slant range visibility 
calculation used in the 
computations. 

5. ................

Sound system 

The sponsor will not be required to repeat the helicopter tests (i.e., tests 5.a.1. through 5.a.8. (or 5.b.1. through 5.b.9.) and 

5.c., as appropriate) during continuing qualification evaluations if frequency response and background noise test results are 
within tolerance when compared to the initial qualification evaluation results, and the sponsor shows that no software 
changes have occurred that will affect the helicopter test results. If the frequency response test method is chosen and fails, 
the sponsor may elect to fix the frequency response problem and repeat the test or the sponsor may elect to repeat the hel-
icopter tests. If the helicopter tests are repeated during continuing qualification evaluations, the results may be compared 
against initial qualification evaluation results or helicopter master data. All tests in this section must be presented using an 
unweighted 

1

⁄

3

-octave band format from band 17 to 42 (50 Hz to 16 kHz). A minimum 20 second average must be taken at 

the location corresponding to the helicopter data set. The helicopter and flight simulator results must be produced using 
comparable data analysis techniques. 

5.a. .............

Basic requirements 

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