Commonwealth legislation

AD/DHC-8/16 Amdt 1 - Engine Bleed Air

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legislative instrument

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This airworthiness directive requires operators of Bombardier (De Havilland) DHC-8-100 aircraft that have not installed de Havilland modifications #8/1155 and #8/1820 to amend their Aircraft Flight Manual to prohibit using engine BLEEDS‑ON during take-off and landing. The change must be implemented by 20 January 1994. Transport Canada advised that a left‑engine failure with BLEEDS‑ON can drive the remaining engine bleed to maximum, reducing available uptrim power; installing the two modifications removes the restriction.

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AD/DHC-8/16 Amdt 1 - Engine Bleed Air

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-8/16

Amdt 1

Engine Bleed Air 3/94 DM

Applicability: DHC-8-100 series aircraft not incorporating de Havilland Inc. modifications #8/1155 and #8/1820.

Requirement: This Directive requires the DHC-8-100 Series Aircraft Flight Manuals to be amended in accordance with Para 1(a) of Transport Canada AD CF-91-32R1 to prohibit the use of engine BLEEDS-ON during take-off and landing.

Note 1: Later AFM amendments to those listed in Transport Canada AD CF-91- 32R1 meet the Requirement of this AD.

Note 2: Incorporation of both de Havilland Inc. modifications #8/1155 (SB 8-21-29) and #8/1820 (SB 8-21-53) is terminating action for the requirements of this AD.

Note 3: Upon incorporation of the respective modifications BLEEDS-ON take-off and landing operations may be conducted in accordance with Supplement 21, Issue 2 of the AFM.

Compliance: Unless previously accomplished, prior to 20 January 1994.

Note: Compliance with the original issue of this AD satisfies the requirements of this amendment.

Background: The requirement reflects advice from Transport Canada that failure of a L.H. engine during a BLEEDS-ON take-off may result in the remaining engine bleed system moving to maximum bleed position.

This condition will result in a reduction of uptrim power available to that engine.

Terminating action for this AD is provided by incorporation of de Havilland Inc. modifications #8/1155 and #8/1820.

Source text

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

1 AD/DHC-8/16 Amdt 1 - Engine Bleed Air

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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