{"schema_version":1,"airport":"PTB","entries":[{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"4488ec668b54","priority":"fyi","category":"airport","kind":"changed","summary":"bottled oxygen: none -> low","source":"APT_BASE","fields":[{"field":"BOTTLED_OXY_TYPE","old":"","new":"LOW"}]},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"2ff5565e44e7","priority":"fyi","category":"runway","kind":"changed","summary":"runway 05: controlling obstacle changed (now 55 ft tall, 1277 ft from threshold, 346 ft left of centerline, clearance slope 19:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"227","new":"346"},{"field":"DIST_FROM_THR","old":"1117","new":"1277"},{"field":"OBSTN_CLNC_SLOPE","old":"26","new":"19"},{"field":"OBSTN_HGT","old":"35","new":"55"}]},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"309f85a7a103","priority":"fyi","category":"runway","kind":"changed","summary":"runway 23: controlling obstacle changed (now , clearance slope 34:1); controlling obstacle: TREE -> none","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"R","new":""},{"field":"CNTRLN_OFFSET","old":"325","new":""},{"field":"DIST_FROM_THR","old":"3432","new":""},{"field":"OBSTN_CLNC_SLOPE","old":"45","new":"34"},{"field":"OBSTN_HGT","old":"71","new":""},{"field":"OBSTN_TYPE","old":"TREE","new":""}]}],"first_cycle":"2025-09-04","last_cycle":"2025-09-04"}