AMTStandards.orgAviation maintenance

Performance number

The anti-detonation rating of a fuel that has a higher critical pressure and temperature than iso-octane (a rating of 100). Iso-octane that has been treated with varying amounts of tetraethyl lead is used as the reference fuel.

Aviation Maintenance Technician Handbook — Airframe, p. G-25

Also defined in 1 more source

The rating of antidetonation characteristics of a reciprocating engine fuel that is better than the high rating reference fuel, iso-octane. Performance numbers are greater than 100.

Aviation Maintenance Technician Handbook — Powerplant, p. G-20