Operating conditions of an ADB SAFEGATE LED PAPI

Direction générale de l’Aviation civile Operating conditions of an ADB SAFEGATE Led PAPI Service technique de l’Aviation civile Technical information note Avril 2020 Introduction The ADB SAFEGATE visual approach slope indicator (PAPI) type LPLI (or L-880(L)... More

Direction générale de l’Aviation civile Operating conditions of an ADB SAFEGATE Led PAPI Service technique de l’Aviation civile Technical information note Avril 2020 Introduction The ADB SAFEGATE visual approach slope indicator (PAPI) type LPLI (or L-880(L) / L-881(L)) is equipped with a heated front glass (preheating function) designed to avoid dew and frost that could alter the light signal. The emission of the light sources is not possible before a three minutes preheating period. Each time the constant current regulator is switched on (even after a power supply loss), the warm-up function is automatically activated making the PAPI unavailable during three minutes. The de-icing function can be deactivated, but in this case, the front glass will no longer be protected against dew or frost and the light signal may be altered. Ministère de la Transition Écologique et Solidaire www.stac.aviation-civile.gouv.fr Less