{"schema_version":1,"airport":"BYL","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"9adb02746db2","priority":"ifr","category":"chart","kind":"changed","summary":"approach LOC RWY 20 redrawn (still amdt 0E)","source":"D-TPP","chart":{"code":"IAP","name":"LOC RWY 20","amdt":"0E","pdf":"https://aeronav.faa.gov/d-tpp/2609/10311L20.PDF"}},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"0c0c1b0af0fa","priority":"fyi","category":"runway","kind":"changed","summary":"runway 20: controlling obstacle changed (now 15 ft tall, 252 ft from threshold, 244 ft left of centerline, clearance slope 3:1); controlling obstacle: none -> TREES","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"L"},{"field":"CNTRLN_OFFSET","old":"","new":"244"},{"field":"DIST_FROM_THR","old":"","new":"252"},{"field":"OBSTN_CLNC_SLOPE","old":"34","new":"3"},{"field":"OBSTN_HGT","old":"","new":"15"},{"field":"OBSTN_TYPE","old":"","new":"TREES"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"f2a61949dccf","priority":"fyi","category":"airport","kind":"changed","summary":"cold temperature airport (altitude correction at or below): -17C -> -16C","source":"APT_BASE","fields":[{"field":"CTA","old":"-17C","new":"-16C"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"327ea61a9bc8","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Cold temperature airport; altitude correction required at or below -16C.","source":"APT_RMK","original":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -16C.","fields":[{"field":"REMARK","old":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -17C.","new":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -16C."}]}],"first_cycle":"2025-05-15","last_cycle":"2026-09-03"}