Commonwealth legislation

AD/DHC-8/1 - Ground and Roll Control Spoilers

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This airworthiness directive requires operators of De Havilland DHC‑8 aeroplanes (serial 003 onward) to carry out manufacturer service‑bulletin modifications that restore normal ground and roll spoiler function and to remove temporary placards and deactivations. Compliance is required before a Certificate of Airworthiness issues.

It addresses a safety issue: temporary deactivations were introduced to prevent uncommanded ground‑mode spoiler deployment that could cause loss of lift. Operators and maintenance organisations must pay for and perform the prescribed work per the referenced service bulletins.

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Current sections

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AD/DHC-8/1 - Ground and Roll Control Spoilers

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-8/1 Ground and Roll Control Spoilers 11/88

Applicability: Model DHC-8 with serial numbers 003 and subsequent.

Requirement: 1. Modify the landing gear proximity switch electronic unit (PSEU) in accordance with De Havilland SB No. 8-32-54 Revision B.

2. Modify the electrical power phase supply for the PSEU BITE power circuit in accordance with De Havilland SB No. 8-32-55 Revision A.

3. Remove the placard, and reinstate the equipment previously deactivated by Transport Canada AD CF-86-11 R2 Para 1, 2 and 3, in accordance with the instructions of De Havilland SB No. 8-27-34 Revision C.

Note: Transport Canada AD CF-86-11 R2 and FAA AD 86-14-51 R1 refer. It should be noted however that compliance with either of these documents does not ensure compliance with this AD, unless specific reference is made to the terminating action of the above referenced Service Bulletins.

Compliance: Before issue of a Certificate of Airworthiness.

Background: Deactivation of the ground spoilers and roll control spoilers was necessary to prevent an uncommanded deployment in the ground mode, and to preclude a hazardous loss of lift in a critical phase of flight. Incorporation of the specified modifications permits removal of the operating limitations and re-establishes normal use of all spoilers in the ground mode.

Source text

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

1 AD/DHC-8/1 - Ground and Roll Control Spoilers