{"schema_version":1,"airport":"4F1","entries":[{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"513eaab313e5","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: 7-10 FT TREES 150 FT FM RY END, 58 FT LEFT OF RWY CNTRLN.","source":"APT_RMK","original":"7-10 FT TREES 150 FT FM RY END, 58 FT LEFT OF RWY CNTRLN.","fields":[{"field":"REMARK","old":"+15-30 FT TREES 100 FT FM RY END 40 FT BOTH SIDES OF CENTERLINE.","new":"7-10 FT TREES 150 FT FM RY END, 58 FT LEFT OF RWY CNTRLN."}]},{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"82875f8be926","priority":"fyi","category":"runway","kind":"changed","summary":"runway 21: controlling obstacle changed (now 19 ft tall, 224 ft from threshold, 40 ft right of centerline, clearance slope 1:1); controlling obstacle: none -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"R"},{"field":"CNTRLN_OFFSET","old":"","new":"40"},{"field":"DIST_FROM_THR","old":"","new":"224"},{"field":"OBSTN_CLNC_SLOPE","old":"20","new":"1"},{"field":"OBSTN_HGT","old":"","new":"19"},{"field":"OBSTN_TYPE","old":"","new":"TREE"}]}],"first_cycle":"2025-11-27","last_cycle":"2025-11-27"}