AMC & GM to Part-21 — Issue 2, Amendment 5

The Annex to Decision 2012/020/R is amended as follows: The text of the amendment is arranged to show deleted text, new or amended text as shown below: (a) deleted text is marked with strikethrough; (b) new or amended text is highlighted in grey; (c) an ellipsis (…) indicates that the remaining text is unchanged in front of or following the reflected amendment.

AMC and GM to Part-21

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SECTION B

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SUBPART I — NOISE CERTIFICATES

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GM 21.B.425(a) Noise certificates

1. Completion of the noise certificate by a Member State 1.1 Completion instructions (…) Block 10. Maximum landing mass (kg) The maximum landing mass associated with the certificated noise levels of the aircraft in kilograms. The unit (kg) should be specified explicitly in order to avoid misunderstanding. If the primary unit of mass for the State of manufacture of the aircraft is different form from kilograms, the conversion factor used should be in accordance with Annex 5 to the Chicago Convention. This item will only be included in the noise certification documentation for noise certificates issued under Chapters 2, 3, 4, 5 and, 12 and 14. Block 11. Noise certification standard The Chapterchapter to which the subject aircraft is noise certificated. For chaptersChapters 2, 8, 10 and 11, the section specifying the noise limits should also be included.

Block 12. Additional modifications incorporated for the purpose of compliance with the applicable noise certification standards This item should contain as a minimum all additional modifications to the basic aircraft as defined by Blocks 5, 7 and 8 that are essential in order to meet the requirements of this Annexthe chapter to which the aircraft is certificated as given under Block 11. Other modifications that are not essential to meet the stated chapter but are needed to attain the certificated noise levels as given may also be included at the discretion of the certificating authority. The additional modifications should be given using unambiguous references, such as supplemental type certificate (STC) numbers, unique part numbers or type/model designators given by the manufacturer of the modification. Block 13. Lateral/full-power noise level The lateral/full-power noise level as defined in the relevant Chapterchapter. It should specify the unit (e.g. EPNdB (unit of the effective perceived noise level)) of the noise level and the noise level should be stated to the nearest tenth of a decibel (dB). This item is included only in noise certification documentation for aircraft certificated to Chapters 2, 3, 4, 5 and, 12 and 14. Block 14. Approach noise level The approach noise level as defined in the relevant chapter. It should specify the unit (e.g. EPNdB) of the noise level and the noise level should be stated to the nearest tenth of a dB. This item is included only in noise certification documentation for aircraft certificated to Chapters 2, 3, 4, 5, 8 and, 12, 13 and 14. Block 15. Flyover noise level The flyover noise level as defined in the relevant chapter. It should specify the unit (e.g. EPNdB) of the noise level and the noise level should be stated to the nearest tenth of a dB. This item is included only in noise certification documentation for aircraft certificated to Chapters 2, 3, 4, 5 and, 12 and 14. Block 16. Overflight noise level The overflight noise level as defined in the relevant chapter. It should specify the unit (e.g. EPNdB or dB(A) (unit of the A-weighted noise level)) of the noise level and the noise level should be stated to the nearest tenth of a dB. This item is included only in noise certification documentation for aircraft certificated to Chapters 6, 8 and, 11 and 13. For tilt-rotors certificated according to Chapter 13 only the overflight noise level established in vertical take-off and landing (VTOL)/conversion mode needs to be stated.

Block 17. The take-off noise level The take-off noise level as defined in the relevant chapter. It should specify the unit (e.g. EPNdB or dB(A)) of the noise level and the noise level should be stated to the nearest tenth of a dB. This item is included only in noise certification documentation for aircraft certificated to Chapters 8 and, 10 and 13. (...)