The Ministry of Land, Infrastructure, Transport and Tourism’s (MLIT) Osaka Aviation Bureau issued a strict warning to Ryukyu Air Commuter.
On November 23, 2024, a Bombardier DHC-8-400 aircraft (registration: JA83RC) returned to Naha Airport shortly after takeoff due to a nose gear malfunction caused by the failure to unlock the nose gear ground lock. During pre-departure operations, the aircraft’s tire rotation check and propeller balance data inspection were conducted via jack-up of the nose gear; however, no maintenance records were created.
During an inspection by the MLIT Osaka Aviation Bureau, it was found that maintenance work was carried out without recording maintenance logs, and some procedures were performed without consulting manuals. In cases where maintenance records were absent, conformity with aviation law standards was assessed without document verification. It was confirmed that some maintenance records were created post-departure.
Many mechanics misunderstood maintenance regulations and operational guidelines, mistakenly believing that minor maintenance tasks did not require documentation. Supervisory staff were aware that such practices violated regulations but took no corrective actions and failed to report or consult with superiors, leading to a finding of malicious intent.
The MLIT Osaka Aviation Bureau has requested that preventive measures be submitted by July 11.
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