COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 400 Series Aeroplanes AD/CESSNA 400/55 Passenger Seat Installation - Inspection 9/78 Applicability: All models: 402B with S/Nos. 402B-0301 to 402B-1332; 404 with S/Nos. 404-0001 to 404-0223; 414 with S/Nos. 414-0251 and up; 414A with S/Nos. 414A-0001 to 414A-0042; 421 with S/Nos. 421-0001 and up; 421A with S/Nos. 421A-0001 and up; 421B with S/Nos. 421B-0001 and up; 421C with S/Nos. 421C-0001 to 421C-0478. Document: Cessna SL ME78-17 (FAA AD 78-13-05 Amdt. 39-3250 refers). Compliance: Within 100 hours time in service after 30 September 1978.