COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Boeing 727 Series Aeroplanes AD/B727/122 Forward and Aft Attendant's Panel Ground Wire Installation Applicability: All Boeing 727 model aircraft except cargo and package freighters. Requirement: Action in accordance with Boeing Service Bulletin 727-20-0002. Compliance: Prior to 6 September 1991. 9/90 Background: Boeing have advised that the P13 and P14 panels on 727 and 737 series aircraft have no electrical grounding, and as a consequence the aluminium face plate and several metallic switches could become electrified. To prevent electrical shock to personnel, an electrical ground wire must be installed on the P13 and P14 panels.