Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
This Airworthiness Directive (AD) is issued following the discovery of a potential chafing between the feeder bundle and the right side partition wall separating the cabin from the lavatory at frames 22/23. This chafing may damage the feeder bundle and cause a sustained smoke-generating short-circuit between the feeder and the partition wall made of resistive composite material. Strong smoke and a difficult-to-localize short-circuit may result in a hazardous situation.
The unsafe condition is sustained smoke in the cabin, which may lead to reduced ability of the flightcrew to operate the airplane. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.