Appendix D to GM 21.A.101 Other guidance for affected areas    

CAA ORS9 Decision No. 1

D.1 Sample Questions in Determining Affected Areas.

Below are sample questions to assist in determining whether an area is affected by the change. If the answer to any of these questions is yes, then the area is considered to be affected.

1. Is the area changed from the identified baseline product?

2. Is the area impacted by a significant product-level change?

3. Is there a functional effect on the unchanged area by a change to the system or system function that it is a part of?

4. Does the unchanged area need to comply with a system or product-level certification specification that is part of the change?

5. Are the product-level characteristics affected by the change?

6. Is the existing compliance for the area invalidated?

D.2 Sub-Areas within an Affected Area.

Within areas affected by a change, there may be ‘sub-areas’ of the area that are not affected. For those sub-areas, the amendment levels at the existing certification basis remain valid, along with the previous compliance findings. For example, if a passenger seat fitting is changed as part of a significant change, then the structure of the seat is affected. Thus, the amendment level for CS 25.561 and CS 25.562, along with other applicable structural certification specifications, would be at the amendment level on the date of application (unless an exception is granted). However, the seat fabric is not affected, so the amendment level for CS 25.853 (flammability) may remain at the existing certification basis, and a new compliance finding would not be required.