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AWB Avionics 21 - Air Conditioning

AWB Title Effective
21-001 Issue 1 Cabin Altitude Alert Pressure Switch Maintenance Requirements 30 August 2002
21-002 Issue 1 Fokker F28 MK 100 Heat Exchangers 27 February 2007
21-003 Issue 1 Boeing 737 Cabin Pressure Safety Relief Valves 13 February 2014
21-004 Issue 1 Requirements and Implications for those Maintaining Air Conditioning Systems Using Refrigerants 30 June 2014