IEC TS 62647-1:2012

Overview

IEC TS 62647-1:2012 - Process management for avionics: Aerospace and defence electronic systems containing lead-free solder - Part 1 provides requirements and objectives for documenting processes that demonstrate aerospace and defence (ADHP) electronic products meet performance, reliability, airworthiness, safety and certifiability requirements when Pb‑free materials or processes are used. The document defines how to prepare a lead‑free control plan (LFCP) that communicates risk management, configuration control and verification approaches without prescribing detailed process instructions.

Key Topics and Requirements

• Lead‑free control plan (LFCP): Structure and administrative requirements for documenting processes, responsibilities, references, plan acceptance and modifications.
• Reliability considerations: High‑level requirements for assessing Pb‑free solder performance (fatigue, thermal cycling, vibration) and for converting available data to applicable service conditions.
• Configuration control & product identification: Control of termination finishes, solder alloys, wiring/connectors, part/PN changes, and traceability to assure consistent product identity over product life.
• COTS assemblies and sub‑assemblies: Requirements and limitations when incorporating commercial‑off‑the‑shelf items built with Pb‑free materials.
• Tin whisker risks: Identification of deleterious effects from Pb‑free surface finishes (e.g., pure tin) and the need to address mitigation in the LFCP.
• Repair, rework, maintenance and support: Expectations for documenting allowable processes and sustaining product configurations throughout service life.
• Testing, data and environmental conditions: Guidance to capture test/analysis methods, environmental/operating conditions and data needed to justify Pb‑free use.
• Informative annexes: Includes a tailoring template, a requirements matrix and configuration control guidance to help Plan owners implement the LFCP.

Practical Applications

• Preparing and submitting a documented LFCP to customers, prime contractors and certification authorities to show Pb‑free risk management in avionics products.
• Guiding OEMs, suppliers and maintenance organizations through decisions on converting assemblies or accepting Pb‑free COTS items.
• Supporting engineering, quality and regulatory teams in assessing reliability tradeoffs, tin‑whisker mitigation and supply‑chain traceability when using lead‑free solder.

Who Should Use This Standard

• Avionics and defence OEMs and tier‑1 suppliers
• PCB and electronic assembly manufacturers working with Pb‑free solders
• Quality, reliability and configuration management personnel
• Certification and airworthiness authorities evaluating Pb‑free changes

Related Standards and Context

• Part of the IEC/TS 62647 series and based on GEIA‑STD‑0005‑1; complements regional legislation drivers such as RoHS/WEEE by addressing ADHP specific risks. Use IEC TS 62647-1:2012 when you need a structured, auditable LFCP for avionics systems involving lead‑free solder.