Definition
Appendix B to 14 CFR Part 29 (Transport Category Rotorcraft) sets out the airworthiness standards a helicopter must meet to be approved for instrument flight. It defines the equipment, stability, performance, and handling requirements the rotorcraft must demonstrate before it can be certified for IFR operations.
Plain English
It is the section of the federal rules that lists what a transport-category helicopter must have and must be able to do before it is allowed to fly in the clouds on instruments.
Context Anchor
Seen when checking whether a transport-category helicopter is certified for IFR flight, often through the aircraft flight manual, type certificate data, or certification basis.
Derivation
An 'appendix' in regulatory writing is an attached section that holds detailed technical requirements separate from the main rule. Appendix B is simply the second such attachment to Part 29, and it happens to be the one covering IFR certification standards for transport-category helicopters.
Why Pilots Care
Determines whether a transport helicopter is legally equipped and certified to fly in clouds or low visibility, directly affecting mission capability and safety.
Intuition Check
Do not read “Appendix B” as extra background material or optional reading. In this context, it is a required FAA certification standard for the helicopter.
Example Sentence 1
The operator confirmed the helicopter was certified to Appendix B of Part 29 before dispatching the IFR flight.
Example Sentence 2
Transport category helicopters without Appendix B compliance are restricted to visual flight rules only.