On 15 November 2013, the Civil Aviation Safety Authority (CASA) issued an amendment to airworthiness directive AD/PZL/5, revoking the approval for the eddy current procedure to be used for M18 wing joint inspections. It also added a 100‑hourly visual inspection, and additional wing-off inspections in M18 aircraft every 2,500 hours. CASA also issued a direction to all registered operators of M18 aircraft in Australia that the aircraft could be flown after compliance with the amended AD.
On 22 November 2013, CASA issued AD/PZL/5 Amendment 2, to additionally require:
- completion of magnetic particle inspections on M18 aircraft with less than 2,500 hours’ time in service
- allow the use of CASA-approved alternative magnetic particle inspection methods
- reduce the complexity of the AD
- make corrections to reference documents.