Document ID: chunk:federal_register_of_legislation:F2006B10663:body:0:p2
Version: federal_register_of_legislation:F2006B10663
Segment Type: other
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Character Range: 2891–4887

39-11708 refers.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

            Compliance:  For Requirement 1.a. - Within the next 50 hours time-in-service (TIS) after the effective date of this Directive or on or before 15 June 2000, whichever occurs first; thereafter, repeat the test at intervals not to exceed 300 hours TIS.

            For Requirement 1.b. - Before further flight.

            For Requirement 2.a. - Within the next 50 hours TIS after the effective date of this Directive or on or before 15 June 2000, whichever occurs first; thereafter, repeat the test at intervals not to exceed 300 hours TIS.

            For Requirement 2.b. - Before further flight. For Requirement 2.c. - Before further flight.
            This Airworthiness Directive becomes effective on 24 May 2000.

            Background:  The United States Federal Aviation Administration has received seven reports of erroneous TOT readings and two reports of incorrect wiring harness terminal lugs on the thermocouple wiring in Model 369D, 369E, 500N, and 600N helicopters with certain analogue/digital TOT indicators. The reports indicated that some of the TOT readings did not agree with the engine ECU and some readings were found to be 4 degrees Celsius to 17 degrees Celsius low.

            This Directive requires repetitive calibration testing of the TOT indicating system and necessary corrective actions, these measures are intended to prevent erroneous TOT indications which could prevent the flight crew from detecting that an engine temperature limitation has been exceeded. This condition, if not corrected, could result in damage to critical engine components, loss of engine power, and a subsequent forced landing.

 Eugene Paul Holzapfel
 Delegate of the Civil Aviation Safety Authority 17 May 2000

 The above AD is notified in the Commonwealth of Australia Gazette on 24 May 2000.