The abbreviations used in this part have the following meanings:

%   percent

°   degree

CO   carbon monoxide

CO2   carbon dioxide

g   gram

HC   hydrocarbon(s)

kN   kilonewton

kW   kilowatt

LTO   landing and takeoff

NOX   oxides of nitrogen

rO   rated output

rPR   rated pressure ratio

SN   smoke number

[77 FR 36381, June 18, 2012]