Commonwealth legislation

AD/LJ45/11 - Engine Firewall

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of Bombardier Learjet 45 aircraft (as identified in Bombardier Service Bulletin 45-54-3 Rev 2 or later FAA‑approved revisions) to inspect the engine pylon trailing edge for unsealed gaps and to clean and seal any found gaps in accordance with the service bulletin. Compliance is required within 12 months of 25 October 2007. The rule assigns inspection and repair costs to aircraft owners/operators and cross‑references FAA AD 2007‑17‑17.

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Current sections

Direct links to the current provisions in AD/LJ45/11 - Engine Firewall.

Learjet 45 Series Aeroplanes

AD/LJ45/11	Engine Firewall	11/2007

Applicability:	Model 45 aircraft, as identified in Bombardier Service Bulletin 45-54-3 Revision 2, or later FAA approved revision.
Requirement:	Inspect the engine pylon trailing edge for unsealed gaps, and clean and seal any unsealed gap in accordance with Bombardier Service Bulletin 45-54-3 Revision 2, or later FAA approved revision.Note: FAA AD 2007-17-17 Amdt 39-15175 refers.
Compliance:	Within 12 months after 25 October 2007, unless already accomplished.
	This Airworthiness Directive becomes effective on 25 October 2007.
Background:	The FAA received a report of unsealed gaps (penetration points) of the engine firewall that were discovered during production. Such a condition, unless corrected, could allow penetration of flammable liquids or fire through the engine firewall into the engine pylon, which could lead to fire inside the aircraft.

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David Villiers
Delegate of the Civil Aviation Safety Authority

10 September 2007

AD/LJ45/11

Engine Firewall

11/2007

Source text

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

Learjet 45 Series Aeroplanes Learjet 45 Series Aeroplanes

Learjet 45 Series Aeroplanes

AD/LJ45/11	Engine Firewall	11/2007

Applicability:	Model 45 aircraft, as identified in Bombardier Service Bulletin 45-54-3 Revision 2, or later FAA approved revision.
Requirement:	Inspect the engine pylon trailing edge for unsealed gaps, and clean and seal any unsealed gap in accordance with Bombardier Service Bulletin 45-54-3 Revision 2, or later FAA approved revision.Note: FAA AD 2007-17-17 Amdt 39-15175 refers.
Compliance:	Within 12 months after 25 October 2007, unless already accomplished.
	This Airworthiness Directive becomes effective on 25 October 2007.
Background:	The FAA received a report of unsealed gaps (penetration points) of the engine firewall that were discovered during production. Such a condition, unless corrected, could allow penetration of flammable liquids or fire through the engine firewall into the engine pylon, which could lead to fire inside the aircraft.

AD/LJ45/11 - Engine Firewall

Plain English Summary

Deep dive

Current sections

Learjet 45 Series Aeroplanes

Learjet 45 Series Aeroplanes

AD/LJ45/11

AD/LJ45/11

Engine Firewall

Engine Firewall

11/2007

11/2007

Source text

Learjet 45 Series Aeroplanes Learjet 45 Series Aeroplanes

Learjet 45 Series Aeroplanes

AD/LJ45/11 AD/LJ45/11

AD/LJ45/11

Engine Firewall Engine Firewall

Engine Firewall

11/2007 11/2007

11/2007