Cam
An eccentric, or lobe, on a rotating shaft that changes rotary motion into linear motion. A cam is mounted on the magnet shaft in a magneto to push upward on the insulated breaker point to separate, or open, the points when the magnet is in a particular location.
Aviation Maintenance Technician Handbook — Powerplant, p. G-5
Also defined in 1 more source
The acronym for the manuals containing the certification rules under the Civil Air Regulations
Taught in PP-G Concepts, PP-H Procedures.