Commonwealth legislation

AD/GROB 115/7 Amdt 2 - Cancellation of the Reduction of the Never Exceed Speed

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Commonwealth

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legislative instrument

Plain English Summary

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This airworthiness directive removes a previously imposed reduction of the "never exceed" airspeed for Grob G115 series aeroplanes (models G115C/C2, G115D/D2, all serial numbers) and restores the prior speed limit after operators complete actions in Grob Service Bulletin 1078-69. It affects owners/operators of those aircraft and takes effect 26 March 1998.

Operators must carry out the service-bulletin inspections/repairs before the first flight after that date. The change follows an investigation that traced buffeting to engine shock-mount vibration (Background; Requirement; Compliance).

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Current sections

Direct links to the current provisions in AD/GROB 115/7 Amdt 2 - Cancellation of the Reduction of the Never Exceed Speed.

AD/GROB 115/7 Amdt 2 - Cancellation of the Reduction of the Never Exceed Speed

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Grob G115 Series Aeroplanes

AD/GROB 115/7

Amdt 2

Cancellation of the Reduction of the Never Exceed Speed

4/98

Applicability: Models G115C, G115C2, G115D, G115D2, all serial numbers. Requirement: Action in accordance with Grob Service Bulletin 1078-69.

Note: LBA AD 96-270/3 refers.

Compliance: Unless already accomplished, before the next flight after 26 March 1998 .

This amendment becomes effective on 26 March 1998.

Background: The investigation of an incident of buffeting when an aircraft approached the never exceed speed, identified a vibration in the aircraft structure that had originated at the engine shock mounts as the cause.

Amendment 1 required certain inspections to clear aircraft for aerobatic manoeuvres while maintaining the airspeed limitation of the previous issue of this Directive.

Amendment 2 is issued in response to a revision of the related LBA AD which cancels the previously required airspeed limitation following successful completion of the buffeting investigation.

Amendment 1 of this airworthiness directive became effective on 9 October 1997.

The original issue of this airworthiness directive became effective on 14 February 1996.

Source text

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

1 AD/GROB 115/7 Amdt 2 - Cancellation of the Reduction of the Never Exceed Speed