Airworthiness Directive · Amendment 39-17462 · Water injection
Aircraft Industries a.s. Airplanes
This AD applies to Aircraft Industries a.s. Model L-420 airplanes, all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for Aircraft Industries a.s. Model L-420 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as in-flight engine flame out occurred at take-off with water injection after reduction of engine power. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, within 30 days after June 18, 2013 (the effective date of this AD), amend the applicable airplane flight manual (AFM) by inserting a copy of Appendix 1 of this AD, opposite the appropriate AFM page on which the water injection procedure is described.
