COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 210 Series Aeroplanes AD/CESSNA 210/42 Fuel Flow Indication System - Hose Inspection and Replacement 11/79 Applicability: Models 210L and T210L with S/Nos. 21061040 and subsequent Models 210M, T210M and P210N modified to incorporate Symbolic Displays Inc. fuel flow indicating system per STC.SA3835WE. Requirement: 1. Inspect the fuel flow transducer installation on the upper left side of the engine adjacent to the fuel distributor manifold. 2. If an NAS 424-4 coupling is installed between transducer and distributor manifold, remove coupling and replace with either hose assembly Aeroquip P/No. AE7010001E0040 or Stratoflex P/No. 111D417-45-0040. Note: FAA AD 79-19-06 Amendment 39-3558 also refers to this subject. Compliance: Within 25 hours time in service after 3 October 1979. Background: The hose assembly connecting the fuel flow transducer with the fuel distributor manifold has proved unsuitable in service and may leak fuel over the engine.