Commonwealth legislation

AD/INST/7 - H14 Automatic Pilot Servo Housing - Inspection

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This rule requires owners and operators of aircraft fitted with King or Honeywell H14 automatic pilot systems to inspect the autopilot servo’s pneumatic housing at the linkage/retaining-lug area for cracks. Inspections had to be completed within 100 flight hours after 26 February 1971. Detecting cracks is critical because a failed housing can cause unexpected autopilot loss and potential loss of control.

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AD/INST/7 - H14 Automatic Pilot Servo Housing - Inspection

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Instruments and Automatic Pilots

AD/INST/7 H14 Automatic Pilot Servo Housing - Inspection 1/71

Applicability: All H14 Automatic Pilots (either King or Honeywell).

Requirement: Inspect the linkage end of pneumatic housing (cylinder), King P/No. 047-2105-00 or Honeywell P/No. 314259, to ensure that no cracking has occurred in the wall of the housing in the areas adjacent to the formed retaining lugs. On servo assemblies which are installed on aircraft it will be sufficient to inspect the lugs on the side nearest to the cable drum only if it is not possible to inspect the remaining lugs without removing the servo from the aircraft.

Compliance: Within 100 hours time in service after 26 February 1971.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.