Air Conditioning — Dump Switch — Modification
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Group 1 TBM 700 aeroplanes with affected switches must modify the dump switch by installing a seal within 12 months of 1 January 2020. From the effective date, only dump switches equipped with a seal may be installed on any TBM 700 aeroplane. Maintenance personnel should note that removing and reinstalling the same switch during the same visit is not considered a new installation.
Summary
EASA Airworthiness Directive 2019-0306 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting DAHER AEROSPACE TBM 700 aeroplanes, excluding serial numbers 1105 and lower. The directive addresses a potential safety issue related to the air conditioning dump switch, specifically those with Part Number 7388475012 without a seal. It mandates modification of the affected switches to ensure continued safe operation of the aircraft.
What changed
EASA Airworthiness Directive 2019-0306 introduces a mandatory modification requiring the installation of a seal on the affected air conditioning dump switches to prevent them from ejecting from their slots. It also establishes requirements for the installation of only sealed dump switches from the effective date onward. This is a new regulation addressing a previously unidentified unsafe condition.
Why it matters
This directive is critical for aviation professionals because an unsealed dump switch may eject during flight, potentially preventing the evacuation of smoke or fumes from the cabin. This condition could increase flight crew workload and pose a risk of injury to occupants. Compliance ensures the continued airworthiness and safety of affected TBM 700 aircraft.
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