EASA 2022-0258

Requires repetitive visual inspections and fluorescent penetrant inspection of the main transmission support case and, depending on findings, replacement. Prompted by reported occurrences of finding cracks on the lateral mounts of the main transmission support case. According to EASA, such cracking is usually caused by excessive corrosion of the surface under the washer and originates from a washer attachment screw threaded hole, and cracking can occur at the upper or lower surfaces of the lateral mount