Document Title: High-Energy Wide-Area Blunt Impact for Composite Structures
Summary: To show compliance with Title 14, Code of Federal Regulations (14 CFR) 25.571(a), the applicant must show, among other things, that catastrophic failure due to accidental damage will be avoided for the life of the airplane. The applicant is required to consider possible damage scenarios when evaluating accidental damage that could result in catastrophic failure. One of these damage scenarios the applicant should assess is accidental damage caused by high-energy wide-area blunt impact (HEWABI) events. HEWABI events (e.g. impacts by service vehicles) are impacts that are spread over a large area that may cause considerable structural damage. While the damage caused by a HEWABI event is typically readily visible in metallic structure, it may leave little or no external indications in composite structure. To ensure that any potentially catastrophic damage resulting from a HEWABI event is detected and repaired, applicants must provide appropriate conditional inspection instructions, or other procedures, to be implemented at the occurrence of such impact events as required per § 25.571(a)(3).
Documents for Download: Draft Document (MS Word)
Draft Document Comment Grid (MS Word)
Reference: 14 CFR 25.571, 25.1529, and appendix H to part 25
Comments Due: November 13, 2015
How to Comment: Email comments to:

Deliver comments by mail or hand to:
Federal Aviation Administration
Transport Airplane Directorate
Standards Staff, Standardization Branch, ANM-113
1601 Lind Avenue SW
Renton, WA 98057

Fax comments to:
Document Title: Approval of Non-Required Safety Enhancing Equipment (NORSEE)
Summary: This policy addresses equipment that is not required by any Federal regulation, installed with the intent to measurably increase aircraft safety. Section 1 provides guidance and procedures for issuing a design, production, and installation approval to a U.S. manufacturer pursuant to Title 14 of the Code of Federal Regulations (14 CFR) 21.8(d), Approval of articles, for equipment designated as "Non-Required Safety Enchancing Equipment" (NORSEE) that is determined to be a minor change to type design and whose failure condition is minor. Section 2 of this policy statement provides a path to install NORSEE when the change to the type design is major and the introduced system has a failure condition that rises above minor.
Documents for Download: Draft Document (PDF)
Draft Document Comment Grid (MS Excel)
Reference: NORSEE
Comments Due: December 28, 2015
How to Comment: Email comments to:

Deliver comments by mail or hand to:
Federal Aviation Administration
Design, Manufacturing and Airworthiness Division, Certification Procedures Branch AIR-110
450 L'Enfant Plaza, SW, 5th Floor
Washington, DC 20024

Fax comments to: