EN 2591-409:1999

Overview

Standard Reference: EN 2591-409:1999
Title: Aerospace series - Elements of electrical and optical connection - Test methods - Part 409: Contact retention in insert
Organization: CEN

EN 2591-409:1999 defines a standardized test method to assess contact retention in the insert of electrical and optical connectors used in aerospace applications. The standard describes how to evaluate the ability of contacts (pins, sockets, optical termini) to remain properly retained in their insulating insert when subjected to axial forces. It is intended to be used together with the general EN 2591 series, providing a harmonized approach for connector qualification and quality control.

Key Topics

• Contact retention assessment: Methodology for determining whether contacts remain seated in the insert under axial loads.
• Test scope: Applies to both electrical and optical connection elements within the aerospace series.
• Specimen preparation and test conditions: Requirements for preparing connector samples and applying axial loading (as referenced by EN 2591).
• Pass/fail evaluation: Criteria for determining retention success or failure after axial loading.
• Repeatability and reporting: Emphasis on consistent procedure and documentation so results are comparable across labs and suppliers.
• Safety and traceability: Guidance for safe test execution and record-keeping to support qualification and procurement decisions.

(Note: EN 2591-409 specifies the method framework; specific load magnitudes and acceptance criteria are referenced or determined in conjunction with the broader EN 2591 series or product requirements.)

Applications

• Qualification testing of aerospace connectors during design validation and type approval.
• Incoming and production quality control for connector manufacturers and suppliers.
• Maintenance and refurbishment acceptance testing for harnesses and plugged systems.
• Failure analysis and root-cause investigation when contact back-out or retention issues occur.
• Procurement and supplier audits to ensure components meet aerospace retention performance expectations.

Who should use this standard

• Connector and harness designers seeking reliable retention data.
• Aerospace OEMs and system integrators assessing connector performance.
• Qualification and test laboratories performing standardized connector tests.
• Manufacturers and suppliers implementing production and incoming inspection procedures.
• Regulatory and quality assurance teams requiring documented test evidence for certification.

Related Standards

• EN 2591 (general series) - EN 2591-409:1999 is to be used together with EN 2591 for complete test and specification context.
• Other parts of the EN 2591 aerospace connection series (refer to CEN for cross-references).

Keywords: EN 2591-409:1999, contact retention, insert, aerospace connectors, test methods, CEN, EN 2591, electrical and optical connection.