Overboost
A condition of excessive manifold pressure in a reciprocating engine. Overboosting occurs when the supercharger is operated at too high a speed.
Aviation Maintenance Technician Handbook — Powerplant, p. G-20
Also defined in 1 more source
A condition in which a reciprocating engine has exceeded the maximum manifold pressure allowed by the manufacturer. Can cause damage to engine components.
Taught in PP-J Concepts, PP-J Procedures.