The Sriwijaya Boeing 737-500, registration PK-CLC performing flight SJ-182 from Jakarta to Pontianak (Indonesia), was climbing out of Jakarta about 11nm north of Jakarta's Sokarno International Airport over the Java Sea when radar and radio contact was lost with the aircraft.
According to ADS-B data the aircraft had departed Sokarno's runway 25R at 07:36Z, was climbing through 10,600 feet at 284 knots over the ground at 07:39:50Z about 11nm north of Soekarno Airport, and was at 07:40:11Z at 1400 feet at 307 knots over the ground about 1.6nm north-northeast of that position. This means that the aircraft had gone down with an average sink rate of 26,300 fpm
On Jan 21st, 2021 Basarnas announced, that the rescue and recovery operation for SJ-182 has been officially ended. Basarnas delivered 324 bags with human remains, 68 small parts of aircraft debris, 55 large parts of aircraft debris, the FDR, and parts of the CVR (without the memory module) to authorities for further processing and identification of the human remains.
On Jan 23rd, 2021 the KNKT chairman stated, that the tech log of the aircraft contained an entry about an autothrottle fault a few days before the crash. There has been no other technical anomaly noted.
It is entirely unclear whether the flight SJ-182 crew has experienced autothrottle issues or whether the autothrottle contributed to the crash. Flight crew are trained and can easily fly the aircraft manually even if the autothrottle system has an issue.
KNKT reported that the FDR contained 330 parameters of a total of 18 flights. The KNKT has already developed a general picture of the accident, however, they need further data from the cockpit voice recorder before publishing any information.
KNKT confirmed a preliminary report will be released within 30 days after the accident (on Feb 8th, 2021)
Source: Avherald