EASA AD DCA-750XL-29: Refrigerant Hose Insulation — Inspection

What to do

Operators of affected Pacific Aerospace 750XL aircraft must inspect and correct the refrigerant hose insulation according to Pacific Aerospace Mandatory Service Bulletin PACSB/XL/086 issue 2 or later approved revisions. This work must be completed within the next 150 hours time in service or by 5 September 2018, whichever occurs first. Operators must not operate the aircraft beyond this deadline without compliance.

Summary

Airworthiness Directive DCA/750XL/29 Refrigerant Hose Insulation – Inspection is issued by the Civil Aviation Authority of New Zealand and applies to Pacific Aerospace Limited 750XL aircraft with serial numbers up to and including 208 that have factory air-conditioning modification PAC/XL/0409 or modification PAC/XL/0618. This directive mandates inspection and correction of non-compliant insulation lagging on the refrigerant hoses of the air-conditioning system to ensure safety. The directive requires compliance with Pacific Aerospace Mandatory Service Bulletin PACSB/XL/086 issue 2 or later approved revisions.

What changed

This new Airworthiness Directive introduces a mandatory inspection and correction procedure for the refrigerant hose insulation on affected Pacific Aerospace 750XL aircraft. It enforces compliance with the instructions detailed in Pacific Aerospace Mandatory Service Bulletin PACSB/XL/086 issue 2 dated 6 April 2018 to address the non-compliant insulation lagging issue.

Why it matters

This directive is critical because the non-compliant insulation lagging on the refrigerant hoses may produce large amounts of smoke in the cabin during a fire, posing a significant safety risk. Aviation professionals, including operators and maintenance organizations, must address this to maintain airworthiness and ensure passenger safety. Compliance helps prevent potential in-flight hazards related to air-conditioning system failures.

What to do

Summary

What changed

Why it matters

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