AD/ELECT/7 - Magneto - BTH Gear - Modification - CANCELLED

This instrument cancels an obsolete aircraft safety rule about ignition systems.

This legislation officially scraps Airworthiness Directive (AD) ELECT/7, a decades-old requirement that mandated a specific gear modification for certain aircraft magnetos (ignition components made by British Thomson-Houston, models AG4 and SG4).

What it does:

• Removes a redundant rule: The original directive (dating to before 1964) required a mechanical modification to the BTH gear before these magnetos could be legally installed in aircraft.
• Housekeeping: Because all affected magnetos would have been modified long ago, the authority determined the safety requirement was no longer needed.

Who it affects:

• Aircraft maintenance providers and operators who may still have historical records referencing this AD.
• Anyone researching vintage aircraft ignition systems.

This is a straightforward administrative cancellation to clear obsolete technical requirements from the aviation safety register.