норми шуму під час польотів на (заданому) ешелоні
noise floor; noise level
noise reduction requirements
calculated noise level
current certified noise level
certificated noise level
certification noise level database
standard noise level
effective perceived noise level
maximum noise level
maximum permissible noise level
maximum tone corrected perceived noise level
measured noise level
monitored noise level
noise level
noise level as a function of take-off mass
noise level radiation
noise pressure level
peak perceived noise level
perceived noise level
permissible noise level
depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance
surveyor's level (surveying level, tbc)
flight path noise measurement point
noise abatement flight track
noise and flight path monitoring installation (NFPMI)
assigned flight level
level flight
level flight time (LFT)
low-level flight
maximum speed of level flight
minimum speed of level flight
minimum usable flight level