What are the two separate locking devices required for a removable fastener whose loss could jeopardise safe operation?

The section does not specify the types of locking devices; it only requires that the fastener incorporate two separate locking devices and that the fastener and its locking devices are not adversely affected by environmental conditions.

Does CS 29.607 allow the use of a self-locking nut on a bolt that rotates during operation if a non-friction locking device is also used?

Yes, a self-locking nut may be used on a bolt subject to rotation in operation if a non-friction locking device is used in addition to the self-locking device.

What is the regulatory basis for the fastener requirements in CS 29.607?

The section is based on ED Decision 2003/16/RM.

CS 29.607 Fasteners

Q: Which fasteners are covered by the requirement for two separate locking devices?

Each removable bolt, screw, nut, pin, or other fastener whose loss could jeopardise the safe operation of the rotorcraft.

Q: What is required for each removable bolt, screw, nut, pin, or other fastener whose loss could jeopardise the safe operation of the rotorcraft?

Each such fastener must incorporate two separate locking devices, and the fastener and its locking devices may not be adversely affected by the environmental conditions associated with the particular installation.

Q: Under what condition is a self-locking nut prohibited on a bolt subject to rotation in operation?

A self-locking nut may not be used on any bolt subject to rotation in operation unless a non-friction locking device is used in addition to the self-locking device.

Q: Is a single self-locking device sufficient for a bolt that rotates in operation?

No, a self-locking nut may not be used on any bolt subject to rotation in operation unless a non-friction locking device is used in addition to the self-locking device.

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CS 29.607 Fasteners

ED Decision 2003/16/RM

(a) Each removable bolt, screw, nut, pin or other fastener whose loss could jeopardise the safe operation of the rotorcraft must incorporate two separate locking devices. The fastener and its locking devices may not be adversely affected by the environmental conditions associated with the particular installation.

(b) No self-locking nut may be used on any bolt subject to rotation in operation unless a non-friction locking device is used in addition to the self-locking device.

Details

Source-Title: CS 29.607 Fasteners View latest amendments

Erulesid: ERULES-1963177438-5513 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

CS 29.607 Fasteners

Details

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