What is the alternative to making a part fire-proof under CS 29.861?

The alternative is to isolate the part under CS 29.1191.

What are the fire protection requirements for parts essential to controlled landing in Category A rotorcraft under CS 29.861?

For Category A rotorcraft, each part of the structure, controls, and rotor mechanism essential to controlled landing that would be affected by powerplant fires must be isolated under CS 29.1191 or must be fire-proof.

For Category A rotorcraft, are parts essential for flight (not just landing) required to be fire-proof?

Yes, for Category A rotorcraft, parts essential to controlled landing and flight that would be affected by powerplant fires must be fire-proof (or isolated under CS 29.1191).

CS 29.861 Fire protection of structure, controls, and other parts

Q: Under CS 29.861, what is the minimum fire protection performance required for essential parts in Category B rotorcraft?

For Category B rotorcraft, essential parts must be fire-proof or protected so that they can perform their essential functions for at least 5 minutes under any foreseeable powerplant fire conditions.

Q: Which parts are covered by the fire protection requirements of CS 29.861?

The requirements apply to each part of the structure, controls, and the rotor mechanism, and other parts essential to controlled landing and (for Category A) flight that would be affected by powerplant fires.

Q: Does CS 29.861 specify a different fire protection standard for Category B rotorcraft compared to Category A?

Yes, for Category B rotorcraft, parts may be fire-proof or protected to perform their essential functions for at least 5 minutes under any foreseeable powerplant fire conditions, whereas Category A requires fire-proof parts (or isolation).

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CS 29.861 Fire protection of structure, controls, and other parts

ED Decision 2003/16/RM

Each part of the structure, controls, and the rotor mechanism, and other parts essential to controlled landing and (for Category A) flight that would be affected by powerplant fires must be isolated under CS 29.1191, or must be:

(a) For Category A rotorcraft, fire-proof; and

(b) For Category B rotorcraft, fire-proof or protected so that they can perform their essential functions for at least 5 minutes under any foreseeable powerplant fire conditions.

Details

Source-Title: CS 29.861 Fire protection of structure, controls, and other parts View latest amendments

Erulesid: ERULES-1963177438-5522 Compare versions

Domain: Initial airworthiness

Amendedby: Initial issue

Applicabilitydate: 14 November, 2003

Entryintoforcedate: 14 November, 2003

Regulatorysource: ED Decision 2003/16/RM Navigate

Regulatorysubject: CS-29

Typeofcontent: CS (Certification specification)

Origin: EASA

Category: EAR