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Safety Action


Local safety actions

As a result of the incidents, the operator implemented a program to replace the transient suppression devices fitted to all its B747 aircraft. The operator implemented the following safety actions to minimise the likelihood of fuel spills until all the B747 aircraft were fitted with the upgraded transient suppression device:

  1. Use of fuel tank quantities for fuelling operations that were less than the certificated maximum figures to ensure the tanks were not filled to maximum capacity;
  2. Pressurisation of the fuel manifold prior to commencing the fuelling operation in order to verify that no defects existed prior to opening any refuel valves;
  3. Manual closure of the refuel valves when a fuel tank was full;
  4. Cessation of the practice whereby circuit breakers were manually pulled to override the overfill protection system;
  5. Reducing refuelling pressure on reaching the required tank quantities;
  6. An increase from 60 minutes to 90 minutes in the period allocated for refuelling of aircraft to facilitate the manual operation of the refuelling system and to drain the surge tanks if required; and
  7. An audit during February 2002 of the refuelling operations at Perth by the operator's quality assurance and industrial safety staff.

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