Commonwealth legislation

AD/MU-2/52 Amdt 1 - Elevator Nose-Down Trim Limit

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires owners/operators of specified Mitsubishi MU-2 models and serial numbers to carry out the applicable Mitsubishi mandatory Service Bulletin work so the elevator nose‑down trim maximum deflection is limited to 1°–3°. Compliance must be completed within set 100‑hour deadlines (different deadlines apply to aircraft covered by the original Directive and those added by Amendment 1). Operators bear the cost, downtime and inspection/modification work; the change aims to reduce incidents of excessive control‑wheel force.

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AD/MU-2/52 Amdt 1 - Elevator Nose-Down Trim Limit

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Mitsubishi MU-2 Series Aeroplanes

AD/MU-2/52

Amdt 1

Elevator Nose-Down Trim Limit 9/93

Applicability: Model MU-2B-10, -15, -20, -25, -26, -30, -35, and -36, with serial numbers listed in

Mitsubishi SB 216.

Model MU-2B-25, -26, -26A, -35, -36, -36A, -40, and -60, with serial numbers listed in Mitsubishi SB 079/27-010.

Requirement: Action in accordance with Mitsubishi Mandatory SB 216 or Mandatory SB 079/27- 010, as applicable.

Note: Japan CAB AD TCD-3740-92 and FAA AD 93-07-11 Amdt 39-8543 refer.

Compliance: For aircraft that were applicable to the original issue of this Directive, compliance remains unchanged:

Within 100 hours time in service after 1 April 1993 or prior to 1 October 1993, whichever occurs first.

For aircraft that are now applicable by the issue of Amendment 1 of this Directive: Within 100 hours time in service after 19 August 1993.

Background: An analysis of the service history on the affected aircraft had revealed one accident and two incidents where the existing elevator nose-down trim deflection had caused excessive control wheel force. This Directive requires certain actions to reduce the maximum deflection of the elevator nose-down trim to a 1-degree to 3-degree range.

Amendment 1 is issued in response to the issue of a FAA AD which requires USA Type Certificated MU-2 aircraft to comply with requirements of this Directive.

Source text

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

1 AD/MU-2/52 Amdt 1 - Elevator Nose-Down Trim Limit