COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 737 Series Aeroplanes AD/B737/58 Magnetic Standby Compass Liner 7/91 Applicability: All model 737 aeroplanes line numbers 1683, 1687, 1693, 1697 & 1700 thru 1769. Requirement: Action in accordance with the Technical Requirements of FAA AD 91-07-14. Compliance: Prior to 31 August 1991. Background: To prevent a high voltage electrical shock hazard to flight deck personnel.