Did a bit of digging:
http://www.airweb.faa.gov....
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgFAR.nsf......
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library......
Quoted from that document:
PART 1--DEFINITIONS AND ABBREVIATIONS
(a) Part 1 Sec. 1.1 is amended as follows:
Sec. 1.1 [Amended]
1. The following new definitions are added:
"Rated takeoff power," with respect to reciprocating, turbopropeller, and turboshaft engine type certification, means the approved brake horsepower that is developed statically under standard sea level conditions, within the engine operating limitations established under Part 33, and limited in use to periods of not over 5 minutes for takeoff operation.
"Rated takeoff thrust," with respect to turbojet engine type certification, means the approved jet thrust that is developed statically under standard sea level conditions, within the engine operating limitations established under Part 33, and limited in use to periods of not over 5 minutes for takeoff operation.
2. The definitions of "maximum continuous power" and "maximum continuous thrust" are amended to read as follows:
"Rated maximum continuous power," with respect to reciprocating, turbopropeller, and turboshaft engines, means the approved brake horsepower that is developed statically or in flight, in standard atmosphere at a specified altitude, within the engine operating limitations established under Part 33, and approved for unrestricted periods of use.
"Rated maximum continuous thrust," with respect to turbojet engines, means the approved jet thrust that is developed statically or in flight, in standard atmosphere at a specified altitude, within the engine operating limitations established under Part 33, and approved for unrestricted periods of use.
Part 33:
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgFAR.nsf...
Interesting requirement of Standard atmosphere there....
