AMC 20-22 — EWIS training programme and target groups

This programme was developed for eight different target groups and may be used for the minimum requirements for initial and recurrent training (see training matrix). Depending on the duties, some may fall into more than one target group and, therefore, must fulfil all objectives of the associated target groups. The target groups are: a. Qualified staff performing EWIS maintenance. b. Qualified staff performing maintenance inspections on wiring systems. c. Qualified staff performing electrical/avionic engineering on in-service aeroplane. d. Qualified staff performing general maintenance/inspections not involving wire maintenance (LRU change is not considered wire maintenance). e. Qualified staff performing other engineering or planning work on in-service aeroplane. f. Other service staff with duties in proximity to EEWIS. g. Flight Deck Crew. h. Cabin Crew.

8.b. Refresher Training. Refresher training should be conducted in a period not exceeding two years. It could consist of a review of previously covered material plus any new material or revisions to publications. Refresher training will follow the EWIS Minimum Initial Training Programme - Appendix A or B for that particular target group.

What it requires

AMC 20-22 is the acceptable means of compliance for training on Electrical Wiring Interconnection Systems (EWIS), captured in EASA guidance from the training programme originally developed by the FAA’s Aging Transport Systems Rulemaking Advisory Committee. It sorts everyone who might touch, inspect, design around or simply work near aircraft wiring into eight target groups (a. to h.), and a single person can fall into more than one group and must then meet every objective for each. Groups 1 and 2 — EWIS maintenance and EWIS inspection staff — have a direct regulatory basis and a syllabus in Appendix A. Section 8 sets the training cadence in two parts: initial training against the Appendix A or B syllabus, using classroom discussion, computer-based training or hands-on practice at the training organisation’s discretion; and continuation training at an interval not exceeding two years, which may simply revisit previously covered material plus anything new, following the same Appendix A or B syllabus for that target group.

Who it applies to

The eight target groups: staff who perform EWIS maintenance or EWIS inspections; electrical/avionic engineers; staff doing general maintenance or inspections that do not involve wire; other engineering or planning staff; service staff whose duties bring them near aircraft wiring (cleaners, cargo loaders, fuellers and similar); flight deck crew; and cabin crew.

UK position

UK AMC/GM text is login-gated and is not quoted on this site. The underlying EWIS training expectation for the equivalent groups carries over into the UK Part-145 framework.

Where it is answered on this site

• EWIS training target groups 1 to 8 explained: who needs what — including Target Group 1, Target Group 2 and the six Appendix B groups, 3 to 8.
• Is online human factors, fuel tank safety and EWIS training accepted by EASA and the UK CAA?

MOST.AERO does not yet run a live EWIS course; the two safety-training courses on this site cover human factors, and an EWIS course is planned.