EASA SIB 2012-15R1
Airbus A318, A319, A320 and A321 aeroplanes — VHF Interference on 135.985 and 135.97 MHz
EASA Safety Information Bulletin 2012-15R1 addresses VHF radio interference issues on frequencies 135.97 MHz and 135.985 MHz affecting Airbus A318, A319, A320, and A321 aeroplanes. The bulletin informs operators about interference caused by certain Electronic Instrument System 1 Display Units, which generate background noise detectable by flight crews. It provides information on the origin of the interference and references Airbus Service Bulletin A320-31-1105 for corrective actions.