seems to reset to STD
Subject: Information regarding indication of the corrected barometric
value on the flight display.
information to the effect that the indication of the corrected barometric value
on the flight display (SMD 45, SMD 68) may occasionally switch back to the standard value. This
spontaneous switching may occur on ground or in flight.
recommends that:
– when the height data is read off on the flight display, a check of the setting of the
barometric correction value be made at the same time.
– before take off, the BARO knob be turned, even if the required QNH is being displayed.
– during AFCS operations in ALT A mode, the setting of the barometric correction value be
checked regularly.