Commonwealth legislation

AD/DHC-8/30 - Nose Wheel Steering Potentiometer Lever Stop

In ForceCTH

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Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

The directive mandates a physical stop be fitted to the nose‑wheel steering potentiometer lever on Bombardier (De Havilland) DHC‑8 Series 100 aircraft, s/n 003–334, by performing Mod 8/1809 per Service Bulletin 8‑32‑99 Rev A. Owners/operators and maintenance organisations must pay for and complete the work by 15 May 1994. The stop limits potentiometer travel to reduce risk of unchecked steering input and possible runway departure, and compliance depends on the manufacturer’s SB and scheduling of maintenance.

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Direct links to the current provisions in AD/DHC-8/30 - Nose Wheel Steering Potentiometer Lever Stop.

AD/DHC-8/30 - Nose Wheel Steering Potentiometer Lever Stop

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/30 Nose Wheel Steering Potentiometer Lever Stop 1/94

Applicability: Model DHC-8 Series 100 aircraft, serial numbers 003 through 334. Requirement: Accomplish de Havilland Modification 8/1809, in accordance with de Havilland

Service Bulletin 8-32-99 Revision A.

Note: Transport Canada AD CF-93-24 refers.

Compliance: Prior to 15 May 1994.

Background: The potentiometer stops in the nose gear steering system have been found to be too short to limit excessive uncontrolled potentiometer lever movement, in the event of failure of the mechanical link between the rudder pedals and the potentiometer.

Failure of the link could result in the aircraft departing the runway during take-off or landing.

Source text

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

1 AD/DHC-8/30 - Nose Wheel Steering Potentiometer Lever Stop