Demonstrators hold placards during a rally against the military coup in front of Indonesian embassy in Yangon, Myanmar, February 24, 2021. REUTERS/Stringer

A protester holds a placard during a rally against the military coup in front of Indonesian embassy in Yangon, Myanmar, February 24, 2021. REUTERS/Stringer

A demonstrator holds a placard during a rally against the military coup in front of Indonesian embassy in Yangon, Myanmar, February 24, 2021. REUTERS/Stringer

Indonesian firefighters use a boat to evacuate locals in an area affected by floods, following heavy rains in Jakarta, Indonesia, February 20, 2021. REUTERS/Ajeng Dinar Ulfiana

A senior doctor reacts as she receives her first shot of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19), as Indonesia approved use of the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

Raffi, 15, reacts while painting himself with silver paint, in Depok, on the outskirts of Jakarta, Indonesia, February 6, 2021. Picture taken February 6, 2021. REUTERS/Adi Kurniawan

Puryanti, a 29-year-old woman, with her nephew Raffi, 15, and son Faldo, 5, covered in silver paint as part of their act to make a living, cross a street in Depok, on the outskirts of Jakarta, Indonesia, February 6, 2021. Picture taken February 6, 2021. REUTERS/Adi Kurniawan

Puryanti, a 29-year-old woman, and her 15-year-old nephew Raffi, cover themselves from head to toe in silver paint to become 'manusia silver' (silver people), as part of their act to make a living, in Depok, on the outskirts of Jakarta, Indonesia, February 6, 2021. Picture taken February 6, 2021. REUTERS/Adi Kurniawan TPX IMAGES OF THE DAY

S. Parlindungan Gultom, a 76-year-old doctor, leaves a temporary tent after receiving his first dose of China's Sinovac Biotech coronavirus disease (COVID-19) vaccine, as Indonesia approved use othe vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

A doctor wearing two protective masks waits to receive his first dose of China's Sinovac Biotech coronavirus disease (COVID-19) vaccine, as Indonesia approved use the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

A doctor looks on as a medical worker prepares a dose of China's Sinovac Biotech coronavirus disease (COVID-19) vaccine, as Indonesia approved use the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

S. Parlindungan Gultom, a 76-year-old doctor, looks on as a medical worker prepares a dose of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19), as Indonesia approved use of the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

S. Parlindungan Gultom, a 76-year-old doctor, receives his first shot of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19), as Indonesia approved use of the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

A senior doctor reacts as he receives his first shot of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19), as Indonesia approved use of the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

V.S. Ritonga, a 84-year-old doctor, receives his first dose of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19) as Indonesia approved use of the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

S. Parlindungan Gultom, a 76-year-old doctor, receives his first shot of China's Sinovac Biotech vaccine for the coronavirus disease (COVID-19), as Indonesia approved use of the vaccine for its elderly population, in Jakarta, Indonesia, February 8, 2021. REUTERS/Willy Kurniawan

A worker wipes the door of a car with the sign of Shopee, an Indonesian e-commerce platform, in Jakarta, Indonesia, February 5, 2021. REUTERS/Ajeng Dinar Ulfiana

Indonesian national flags fly at a business district, following the coronavirus disease (COVID-19) outbreak, in Jakarta, Indonesia, February 5, 2021. REUTERS/Ajeng Dinar Ulfiana

Healthcare workers are seen at the screening station during a mass coronavirus disease (COVID-19) vaccination for medical workers at the Istora Senayan stadium in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

A healthcare worker wearing personal protective equipment (PPE) administers a dose of Sinovac's vaccine for the coronavirus disease (COVID-19) during a mass vaccination for medical workers at the Istora Senayan stadium in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

Indonesian medical workers queue to receive the Sinovac's vaccine for the coronavirus disease (COVID-19) during a mass vaccination at the Istora Senayan stadium in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

A healthcare worker prepares a dose of Sinovac's vaccine for the coronavirus disease (COVID-19) during a mass vaccination for medical workers at the Istora Senayan stadium in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

Indonesian medical workers stand in line as they queue to receive the Sinovac's vaccine for the coronavirus disease (COVID-19) during a mass vaccination at the Istora Senayan stadium in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

Healthcare workers prepare Sinovac's vaccine for the coronavirus disease (COVID-19) during a mass vaccination for Indonesian medical workers, at the Istora Senayan stadium in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

General view of a mass vaccination for Indonesian medical workers at the Istora Senayan indoor stadium, amid the coronavirus disease (COVID-19), in Jakarta, Indonesia, February 4, 2021. REUTERS/Willy Kurniawan

Indonesian navy personnel carry a body bag on the last day of search and rescue operation for Sriwijaya Air flight SJ 182, which crashed into the Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 21, 2021. REUTERS/Ajeng Dinar Ulfiana

An Indonesian medical worker receives a dose of the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

Indonesian medical workers wait to receive a dose of the Sinovac vaccine, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker receives a dose of the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian doctor shows a bottle of the Sinovac vaccine before receiving a dose of it, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), at a hospital in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker takes a temperature check before receiving a dose of the the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

Indonesian medical workers go through a health screening before receiving a dose of the the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker receives a dose of the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

Indonesian medical workers wait to receive the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker holds a vaccine carrier containing doses of the Sinovac vaccine at a hospital, as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 21, 2021. REUTERS/Willy Kurniawan

Indonesian rescue personnel stand near the remains of Sriwijaya Air flight SJ 182, which crashed into the Java Sea, during the search and rescue operation at Tanjung Priok port, Jakarta, Indonesia, January 19, 2021. REUTERS/Ajeng Dinar Ulfiana

Indonesian rescue personnel push the turbine of Sriwijaya Air flight SJ 182, which crashed into the Java Sea, during search and rescue operation at Tanjung Priok port in Jakarta, Indonesia, January 19, 2021. REUTERS/Ajeng Dinar Ulfiana

An Indonesian doctor and medical workers wait to receive a dose of the Sinovac's vaccine at a district health facility as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian doctor has a temperature check before she receives a dose of the Sinovac's vaccine at a district health facility as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian doctor has a temperature check before she receives a dose of the Sinovac's vaccine at a district health facility as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker receives a dose of the Sinovac's vaccine for the coronavirus disease (COVID-19) at a district health facility in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian doctor takes pictures of a vial with the Sinovac's vaccine at a district health facility as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian Red Cross personnel sprays disinfectant during search and rescue operation for Sriwijaya Air flight SJ182 which crashed into the Java sea at Tanjung Priok port, in Jakarta, Indonesia, January 18, 2021. REUTERS/Ajeng Dinar Ulfiana

Indonesian navy personnel carry a body bag during a search and rescue operation for Sriwijaya Air flight SJ 182, which crashed into the Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 18, 2021. REUTERS/Ajeng Dinar Ulfiana

Indonesian navy personnel stand near the debris from the Sriwijaya Air flight SJ 182, which crashed into the Java sea, during a search and rescue operation at Tanjung Priok port in Jakarta, Indonesia, January 18, 2021. REUTERS/Ajeng Dinar Ulfiana

Indonesian navy personnel carry debris of Sriwijaya Air flight SJ 182, which crashed into Java sea, during the search and rescue operation, at Tanjung Priok port, in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Director of Indonesia's Search and Rescue Agency Rasman MS gives to an Indonesian National Transport and Security Commission (KNKT) officer the cover of the Cockpit Voice Recoder (CVR) and Flight Data Recorder (FDR) of Sriwijaya Air flight SJ 182, which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Director of Indonesia's Search and Rescue Agency Rasman MS gives to an Indonesian National Transport and Security Commission (KNKT) officer the cover of the Cockpit Voice Recoder (CVR) and Flight Data Recorder (FDR) of Sriwijaya Air flight SJ 182, which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

A member of Indonesian navy personnel carries debris of Sriwijaya Air flight SJ 182, which crashed into Java sea, during the search and rescue operation, at Tanjung Priok port, in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Indonesian rescue personnel sweep the floor near the debris of Sriwijaya Air flight SJ 182, which crashed into Java sea, during the search and rescue operation, at Tanjung Priok port, in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Indonesian Navy personnel and rescue workers stand on the dock as they wait for Indonesian Naval Warship KRI Kurau to be docked carrying bags of debris and body parts, during the search and rescue operation for Sriwijaya Air flight SJ 182, which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Indonesian Navy personnel carry a body bag during the search and rescue operation for Sriwijaya Air flight SJ 182, which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Assistant Commander of Indonesian Western Naval Flee Colonel Alit shows the cover of the Cockpit Voice Recoder (CVR) and Flight Data Recorder (FDR) of Sriwijaya Air flight SJ 182, which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Assistant Commander of Indonesian Western Naval Flee Colonel Alit gives to Operation Director of Indonesia's Search and Rescue Agency Rasman MS the cover of the Cockpit Voice Recoder (CVR) and Flight Data Recorder (FDR) of Sriwijaya Air flight SJ 182, which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia, January 17, 2021. REUTERS/Willy Kurniawan

Indonesian soldiers look at the debris of the Sriwijaya Air flight SJ 182 which crashed into Java sea, during the search and rescue operation at Tanjung Priok port in Jakarta, Indonesia January 16, 2021. REUTERS/Willy Kurniawan

An Indonesian navy personnel walks as he guards near the debris of the Sriwijaya Air flight SJ 182 which crashed into Java sea, during the search and rescue operation at Tanjung Priok port in Jakarta, Indonesia January 16, 2021. REUTERS/Willy Kurniawan

An Indonesian Red Cross personnel sprays disinfectant on bags containing body parts of passengers of Sriwijaya Air flight SJ-182 which crashed into Java sea, during the search and rescue operation at Tanjung Priok port in Jakarta, Indonesia January 16, 2021. REUTERS/Willy Kurniawan

Indonesian soldiers stand in front of the debris of the Sriwijaya Air flight SJ 182 which crashed into Java sea, during the search and rescue operation at Tanjung Priok port in Jakarta, Indonesia January 16, 2021. REUTERS/Willy Kurniawan

An Indonesian Search and Rescue personnel walks past debris of the Sriwijaya Air flight SJ 182 which crashed into Java sea, at Tanjung Priok port in Jakarta, Indonesia January 16, 2021. REUTERS/Willy Kurniawan

How the Indonesian airline relied on an ageing fleet