COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Piper PA-28 Series Aeroplanes AD/PA-28/83 Battery Protection and Rear Seat Installation - Inspection 1/82 Applicability: All models PA-28-151 & PA-28-161 with S/Nos. referenced in Piper SB No. 631B or with S/Nos. referenced in subsequent issues or revisions of that SB. Document: Piper SB No. 631B. (FAA AD 81-23-05 Refers). Compliance: 1. Part I: Before further flight after 25 November 1981, unless already accomplished. 2. Part II: Within 50 hours time in service after 25 November 1981, unless already accomplished. Background: The manufacturer has received reports of the seat base springs chafing the battery box cover and the springs subsequently contacting the battery terminals.