{"schema_version":1,"airport":"MD1","entries":[{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"a5ab1c0fe726","priority":"fyi","category":"runway","kind":"changed","summary":"runway 20: controlling obstacle changed (now 55 ft tall, 928 ft from threshold, 64 ft left of centerline, clearance slope 16:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"32","new":"64"},{"field":"DIST_FROM_THR","old":"930","new":"928"},{"field":"OBSTN_CLNC_SLOPE","old":"17","new":"16"},{"field":"OBSTN_HGT","old":"54","new":"55"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"8d03f6fe6155","priority":"fyi","category":"runway","kind":"changed","summary":"runway 20: controlling obstacle changed (now 54 ft tall, 930 ft from threshold, 32 ft left of centerline, clearance slope 17:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"64","new":"32"},{"field":"DIST_FROM_THR","old":"928","new":"930"},{"field":"OBSTN_CLNC_SLOPE","old":"16","new":"17"},{"field":"OBSTN_HGT","old":"55","new":"54"}]}],"first_cycle":"2024-12-26","last_cycle":"2025-12-25"}