05/09/2026
Saturday one for the engineers.
EWIS damage almost never announces itself. There is no fault message for a chafed bundle — the wiring degrades quietly and then something downstream fails loudly.
Five things trained EWIS inspectors look for:
Chafing where a bundle crosses structure (check the protective sleeve, not the wire).
Contamination — fluid, lint and metal shavings turning a harmless bundle into a conductive one.
Bend radius violations at connectors, usually after a rushed reinstallation.
Improper repairs, including splices that were never in the approved data.
Clamps and ties carrying loads they were never specified for.
This is straight out of our EWIS Target Groups 1 & 2 course, which covers the certifying staff and technician syllabus properly.
Link in the first comment if you want the full thing.