COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Beechcraft 300 Series Aeroplanes AD/BEECH 300/9 Amdt 1 Outflow/Safety Valve 3/98 Applicability: All model 300 series aircraft with serial numbers as listed in the requirement document. Requirement: Inspect and if necessary replace the outflow/safety valve in accordance with the procedures detailed in Beech SB 2484 Revision 1 dated October 1995. Aircraft previously certified against the initial issue of this Directive can be certified as compliant with Amdt 1. No person shall install on any aircraft any Outflow/Safety Valve found to be unserviceable in accordance with this directive. Note: FAA AD 97-25-01 Amdt 39-10224 refers and replaces FAA AD 96-17-10 Amdt 39-9719. Compliance: Within 200 hours time in service or 4 months, whichever occurs first, from the effective date of this directive. This amendment becomes effective on 26 February 1998. Background: Manufacturing problems with the safety valve may cause a rapid decompression of the aircraft should a valve failure occur. This amendment expands the range of serial numbers per outflow/safety valves affected. The original issue of this airworthiness directive became effective on 7 November 1996.