The Civil Aviation Bureau of the Ministry of Land, Infrastructure, Transport and Tourism has issued a business improvement order to JAL Engineering for inappropriate conduct in maintenance operations.
On September 4th, maintenance work conducted on JAL flight 623 from Tokyo/Haneda to Kumamoto allowed the plane to depart without conducting certain mandatory post-maintenance airworthiness verification activities required by aviation law. Furthermore, after recognizing the omission, the necessary measures were not promptly taken, resulting in the operation of a total of four flights.
Moreover, an audit conducted by the authorities on September 20th triggered the discovery of numerous instances in which the required measuring equipment demanded by the aircraft manufacturer was not used during the brake replacement work on JAL’s Boeing 767 aircraft. This work was part of the recurrence prevention measures following a parts loss incident that occurred on JAL flight 317 on October 20th, 2022, and was supposed to ensure proper assembly verification measures.
Both cases were in violation of the maintenance management manual and authorized operational regulations, which they are required to comply with under the Aviation Law for the management of contracted maintenance services. The Civil Aviation Bureau has requested a report on the necessary recurrence prevention measures by January 16, 2024.
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