AD NUMBER: 2007-05-01
MANUFACTURER: CASA
SUBJECT: Airworthiness Directive 2007-05-01
SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above. This 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 follows: On 23 November 2006, Emergency Airworthiness Directive 2006-0351-E was published requiring an inspection to be performed on C-212 aeroplanes having been used for Maritime Patrol or other similar low altitude operations, due to the fact that, after initial examination of the evidences of a recent C-212 Maritime Patrol aircraft accident, cracks had been found in the center wing lower skin at STA Y=1030. At the time of the accident, the aircraft had accumulated 17,000 flight hours and 7,300 flight cycles. The cracks were suspected to be caused by fatigue. After a more detailed examination in the laboratory, it has been determined that the initiation of the cracks was produced by fretting. * * * * * The above mentioned cracks, if not timely detected, could lead to reduced structural integrity of the aircraft. ** * * * * * * This AD requires actions that are intended to address the unsafe condition.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/