Paragraph 3
Subject to the provisions of paragraph 4 of this Part of this Schedule an aeroplane having the maximum total weight authorised specified in the 1st column of the following Table shall not, at the points referred to at (a), (b) and (c) of paragraph 2 of this Part of this Schedule, exceed in the noise certification reference conditions the noise levels in relation to those points in the 2nd column, the 3rd, 4th and 5th columns (whichever is applicable having regard to the number of engines installed in the aeroplane) and in the 6th column of that Table, as shown by flying trials.
TABLE
| Noise level in EPNdB | |||||
|---|---|---|---|---|---|
| Maximum total weight authorised of aeroplane | At point (a) | At point (b) | At point (c) | ||
| 2 engines | 3 engines | 4 engines | |||
| 400,000 kg or more | 103 | ||||
| 385,000 kg or more | 101 | 104 | 106 | ||
| 280,000 kg or more | 105 | ||||
| 48,125 kg or less | 89 | ||||
| 35,000 kg or less | 94 | 98 | |||
| 28,615 kg or less | 89 | ||||
| 20,234 kg or less | 89 | ||||
Where the maximum total weight authorised of the aeroplane is between the weights specified in the above Table, the noise levels which are not to be exceeded shall vary linearly according to the logarithm of the maximum total weight authorised of the aeroplane.
The necessary corrections shall be made where flying trials are carried out in conditions other than the noise certification reference conditions.