It was a 2009 plane so didn't have to have battery backup which was 2010 - https://www.pprune.org/11803679-post1676.html https://www.pprune.org/11803679-post167

It was a 2009 plane so didn't have to have battery backup which was 2010 - https://www.pprune.org/11803679-post1676.html https://www.pprune.org/11803679-post1676.html Age - https://www.planespotters.net/airframe/boeing-737-800-hl8088-jeju-air/e54n1v https://www.planespotters.net/airframe/boeing-737-800-hl8088... Source it stopped recording - https://www.molit.go.kr/USR/NEWS/m_72/dtl.jsp?id=95090593 https://www.molit.go.kr/USR/NEWS/m_72/dtl.jsp?id=95090593