Commonwealth legislation

AD/DHC-8/7 Amdt 1 - Electronic Engine Control Units

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legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Bombardier (De Havilland) DHC‑8 aeroplanes to install manufacturer-specified modifications to reduce the risk of lightning transient damage to electronic engine control units. Work must follow the applicable service bulletins and be completed by 10 August 1990.

The rule applies to all DHC‑8 owners/operators, who must pay for, schedule and document the modifications; this creates parts, labour and downtime costs and requires following the specified maintenance instructions.

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AD/DHC-8/7 Amdt 1 - Electronic Engine Control Units

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-8/7

Amdt 1

Electronic Engine Control Units 3/90

Applicability: All DHC-8 series aeroplanes as detailed in the Requirement Documents.

Requirement: 1. Incorporate modification No 8/0597 in accordance with DHC-8 SB 8-73-7 Revision E dated 14 October 1988 or later revision.

2. Incorporate modification No 8/0598 in accordance with DHC-8 SB 8-71-10 Revision B dated 14 October 1988 or later revision.

3. Incorporate modification No 8/0964 in accordance with DHC-8 SB 8-72-2 Revision A dated 14 October 1988 or later revision.

4. Incorporate modification No 8/0813 in accordance with DHC-8 SB 8-72-4 Revision A dated 14 October 1988 or later revision.

5. Incorporate modification No 8/1416 in accordance with DHC-8 SB 8-61-16 dated 15 December 1989 or later revision.

Note: Transport Canada Airworthiness Directive CF 85-06 R2 also refers.

Compliance: Prior to 10 August 1990.

Background: This AD is issued to require incorporation of five modifications which, when incorporated will minimize the danger of lightning transient-induced damage to the electronic engine control units. Amendment 1 to this AD is issued to include a requirement to incorporate an additional modification (Requirement 5) as advised by Boeing Canada de Havilland Division.

Source text

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

1 AD/DHC-8/7 Amdt 1 - Electronic Engine Control Units