{"schema_version":1,"airport":"4C2","entries":[{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"d51ed548b158","priority":"fyi","category":"runway","kind":"changed","summary":"runway 09: controlling obstacle changed (now 53 ft tall, 1074 ft from threshold, 40 ft left of centerline, clearance slope 20:1)","source":"APT_RWY_END","fields":[{"field":"OBSTN_CLNC_SLOPE","old":"21","new":"20"},{"field":"OBSTN_HGT","old":"50","new":"53"}]}],"first_cycle":"2025-11-27","last_cycle":"2025-11-27"}