{"schema_version":1,"airport":"58C","entries":[{"cycle":"2025-07-10","from_cycle":"2025-06-12","id":"08f9c80f0c7c","priority":"fyi","category":"runway","kind":"changed","summary":"runway 18: controlling obstacle changed (now 41 ft tall, 450 ft from threshold, 100 ft left of centerline, clearance slope 10:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"130","new":"100"},{"field":"OBSTN_CLNC_SLOPE","old":"11","new":"10"}]}],"first_cycle":"2025-07-10","last_cycle":"2025-07-10"}