Commonwealth legislation

AD/LEARJET 35/41 - Engine Firewall

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Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This directive requires owners/operators of Gates Learjet 35, 35A, 36 and 36A aeroplanes to inspect the engine firewall on the engine pylon side for any unsealed gaps and to clean and seal any gaps in accordance with Learjet Service Bulletin 35/36-54-3 (or a later FAA‑approved revision). Compliance is required within 12 months after 25 October 2007. The stated purpose is to stop flammable liquids or fire from passing the firewall into the pylon and potentially causing a fire inside the aircraft; it places inspection and repair costs and scheduling obligations on operators.

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Direct links to the current provisions in AD/LEARJET 35/41 - Engine Firewall.

Gates Learjet 35 and 36 Series Aeroplane

Gates Learjet 35 and 36 Series Aeroplanes

AD/LEARJET 35/41	Engine Firewall	11/2007

Applicability:	Model 35, 35A, 36, and 36A aircraft, as identified in Learjet Service Bulletin35/36-54-3 original issue, or later FAA approved revision.
Requirement:	Inspect for unsealed gaps on the engine pylon side of the engine firewall, and clean and seal any unsealed gap in accordance with Learjet Service Bulletin 35/36-54-3 original issue, 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

7 September 2007

AD/LEARJET 35/41

Engine Firewall

11/2007

Source text

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

Gates Learjet 35 and 36 Series Aeroplane Gates Learjet 35 and 36 Series Aeroplanes

Gates Learjet 35 and 36 Series Aeroplanes

AD/LEARJET 35/41	Engine Firewall	11/2007

Applicability:	Model 35, 35A, 36, and 36A aircraft, as identified in Learjet Service Bulletin35/36-54-3 original issue, or later FAA approved revision.
Requirement:	Inspect for unsealed gaps on the engine pylon side of the engine firewall, and clean and seal any unsealed gap in accordance with Learjet Service Bulletin 35/36-54-3 original issue, 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/LEARJET 35/41 - Engine Firewall

Plain English Summary

Deep dive

Current sections

Gates Learjet 35 and 36 Series Aeroplanes

Gates Learjet 35 and 36 Series Aeroplanes

AD/LEARJET 35/41

AD/LEARJET 35/41

Engine Firewall

Engine Firewall

11/2007

11/2007

Source text

Gates Learjet 35 and 36 Series Aeroplane Gates Learjet 35 and 36 Series Aeroplanes

Gates Learjet 35 and 36 Series Aeroplanes

AD/LEARJET 35/41 AD/LEARJET 35/41

AD/LEARJET 35/41

Engine Firewall Engine Firewall

Engine Firewall

11/2007 11/2007

11/2007