The examination discovered two deferred maintenance items (DMI) given that December 25, 2020,”
Jakarta – The National Committee for Transport Security (KNKT) provided details of the preliminary maintenance of Sriwijaya Air flight SJ 182 that crashed into the waters of Seribu Islands on January 9, 2021.
” The examination found two Deferred Maintenance Products (DMIs) because December 25, 2020,” Chief of the KNKT Sub-Committee for Flight Accident Examination Capt. Nurcahyo Utomo stated during a virtual press conference here on Wednesday.
Maintenance deferment accorded with the flight dispatch rules, he revealed.
Utomo explained that the Minimum Equipment List (MEL) referred to products that must be functional for an airplane to fly, and any non-operational product can be noted as a Deferred Maintenance Product (DMI).
” On December 25, 2020, the Mach Airspeed Indication was found damaged on the best side. The upkeep that had actually been performed was not successful, and the problem was moved into the DMI, and the item was categorized as repair work classification C in the deferral list in accordance with the MEL,” he mentioned.
Utomo mentioned that products put in the classification C shall be fixed with 10 successive calendar days.
” On January 4, 2021, the sign was replaced, with great result, so the DMI was closed,” he revealed.
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On January 3, 2021, the pilot reported that the autothrottle was unserviceable.
The autothrottle supposedly malfunctioned again on January 4,2021 It was later repaired, though the problem continued, and it was placed in the DMI list.
The autothrottle was fixed on January 5, 2021, with excellent outcome, and the DMI was closed.
” We found no DMI notes in the aircraft upkeep log until January 9, 2021,” he mentioned.
The KNKT found abnormalities in the autothrottle system of the Sriwijaya Air flight SJ 182, he said.
” Today, we only understand that for the left autothrottle, the retreat was too far. Was it broken? We do not understand due to the fact that both of them moved in a different way. Both autothrottles of the plane revealed anomalies. For the left one, the retreat was too far, while the best one did not move,” he described.
Utomo noted that the movements of an autothrottle were linked to 13 other components.
We need to look at the 13 other parts related to the autothrottle motion.
The KNKT had sent numerous parts, including the ground proximity warning system (GPWS), obtained from the crash site to the aircraft’s manufacture. (INE)
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