COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES SAAB SF340 Series Aeroplanes AD/SF340/22 Forward Toilet Service Door 3/91 Applicability: Model 340B with serial numbers; SAAB 340-163, -165,- 166, -199, -171, 172, 174, 177, 180, -181, -184, -191, through -194, -198, -199, -201 through -207, -210 through - 212, -214, -216, -218, -219. Requirement: Action in accordance with the technical requirements of Swedish LFV AD 1-044 Rev A. Note: SAAB-SCANIA AB SB SAAB 340-52-013 Rev. 1 refers. Compliance: As specified in the Requirement Document with revised effective date 21 March 1991. Background: Following the loss of a fwd toilet service door during flight, the Swedish Civil Aviation Administration requires the incorporation of a modification that reinforces the door and secures the hinge pin.