Firewall Sound Insulation - Inspection
- Published
- Effective
- Deadline
- Replaces
- 750XL/27
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators must inspect the aft face of the firewall during the next 300-hour maintenance inspection or by 31 May 2018, whichever is later, following the instructions in MSB PACSB/XL/095 issue 1. If black foam insulating material is found, it must be removed before further flight as per the service bulletin. Compliance with this directive is mandatory to continue operating the affected aircraft.
Summary
Airworthiness Directive DCA/750XL/27A Firewall Sound Insulation - Inspection is issued by the Civil Aviation Authority of New Zealand and applies to all Pacific Aerospace 750XL aircraft with serial numbers up to and including 215. This directive mandates inspection of the firewall's aft face sound insulation material to ensure compliance with burn test criteria specified in FAR 23.853(f). If non-compliant black foam insulation is found, it must be removed following the instructions in Pacific Aerospace Mandatory Service Bulletin PACSB/XL/095.
What changed
DCA/750XL/27A revises the previous directive DCA/750XL/27 to clarify the requirement that the firewall sound insulation material must meet FAR 23.853(f) burn test criteria. It introduces a mandatory inspection and removal process for black foam insulating material on the firewall as detailed in the latest Pacific Aerospace Mandatory Service Bulletin PACSB/XL/095 issue 1 dated 21 December 2017.
Why it matters
This directive is critical for operators and maintenance organizations to ensure the fire safety of Pacific Aerospace 750XL aircraft by verifying that firewall insulation materials meet regulatory burn resistance standards. Compliance helps prevent potential fire hazards caused by non-compliant insulation materials, thereby enhancing aircraft safety and regulatory adherence.
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