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:
An operator reported several cases of wire damages at the pylon/ wing interface. Analysis revealed that wires damages are due to installation quality issue resulting from lack of information in installation drawings and job cards. Moreover detailed analysis has highlighted that the Low Pressure Valve (LPV) wires were not segregated by design. * * * * * If left uncorrected, the wire chafing could impact fire protection and detection system. It may also induce dormant failure on LPV preventing its closure leading to a permanent and uncontrolled fire (in case of fire ignited upstream the High Pressure Valve (HPV)). * * * * * The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.