{"schema_version":1,"airport":"8PA4","entries":[{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"98eec5effdfc","priority":"fyi","category":"runway","kind":"changed","summary":"runway 06: controlling obstacle changed (now 40 ft tall, 155 ft from threshold, 83 ft left of centerline, clearance slope 3:1); controlling obstacle: none -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"L"},{"field":"CNTRLN_OFFSET","old":"","new":"83"},{"field":"DIST_FROM_THR","old":"","new":"155"},{"field":"OBSTN_CLNC_SLOPE","old":"","new":"3"},{"field":"OBSTN_HGT","old":"","new":"40"},{"field":"OBSTN_TYPE","old":"","new":"TREE"}]}],"first_cycle":"2026-03-19","last_cycle":"2026-03-19"}