AWB 21-1 Issue 1 - Cabin Altitude Alert Pressure Switch Maintenance Requirements
AWB 21-1 Issue 1, 30 August 2002
Cabin Altitude Alert Pressure Switch Maintenance Requirements
All pressurised aircraft engaged in the carriage of fare paying passengers.
Who should read this AWB
All maintenance personnel, maintenance organisations, Air Operator Certificate holders.
CASA has been advised by the Australian Transport Safety Bureau Air Safety (ATSB) through Recommendation No. R20020101 that there have been instances where the cabin altitude alerting system has failed to activate.
All operators of Australian registered pressurised aircraft engaged in the carriage of fare paying passengers should ensure;
- the adequacy of the maintenance requirements for calibration, functional test and return to service of barometric pressure switches used to activate cabin altitude alert systems; and
- their system of maintenance addresses these requirements.