FAA Federal Aviation Regulations (FARS, 14 CFR)

The abbreviations used in this part have the following meanings in both upper and lower case:

CO      Carbon monoxide

EPA      United States Environmental Protection Agency

FAA      Federal Aviation Administration, United States Department of Transportation

HC      Hydrocarbon(s)

HP      Horsepower

hr      Hour(s)

H₂₀      water

kg      Kilogram(s)

kJ      Kilojoule(s)

LTO      Landing and takeoff

min      Minute(s)

NO_X      Oxides of nitrogen

Pa      Pascal(s)

rO      Rated output

rPR      Rated pressure ratio

sec      Second(s)

SP      Shaft power

SN      Smoke number

T      Temperature, degrees Kelvin

TIM      Time in mode

W      Watt(s)

°C      Degrees Celsius

%      Percent

Doc. No. 25613, 55 FR 32861, Aug. 10, 1990, as amended by Amdt. 34-3, 64 FR 5559, Feb. 3, 1999]