{"schema_version":1,"airport":"O81","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"b5a2d6dd8a55","priority":"action","category":"remark","kind":"removed","summary":"remark removed: COMMUNICATIONS PRVDD BY MC MINNVILLE RADIO ON FREQ 122.6 (KLAMATH FALLS RCO).","source":"ATC_RMK","original":"COMMUNICATIONS PRVDD BY MC MINNVILLE RADIO ON FREQ 122.6 (KLAMATH FALLS RCO)."},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"78078f65a60d","priority":"fyi","category":"tower","kind":"removed","summary":"ATC facility entry removed, non-towered (it named no tower or approach control)","source":"ATC_BASE","fields":[{"field":"FACILITY_TYPE","old":"NON-ATCT","new":""},{"field":"FACILITY_ID","old":"O81","new":""},{"field":"FACILITY_NAME","old":"TULELAKE MUNI","new":""},{"field":"REGION_CODE","old":"AWP","new":""}]},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"17225c2f92d6","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.6 via the Klamath Falls outlet no longer available","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"3fdd8c067c42","priority":"fyi","category":"airport","kind":"changed","summary":"fuel: added Jet A, kerosene, without FS-II (A)","source":"APT_BASE","fields":[{"field":"FUEL_TYPES","old":"100LL","new":"100LL,A"}]},{"cycle":"2025-07-10","from_cycle":"2025-06-12","id":"872f0071421e","priority":"fyi","category":"runway","kind":"changed","summary":"runway 12: controlling obstacle changed (now 15 ft tall, 650 ft from threshold, 170 ft left of centerline, clearance slope 30:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"R","new":"L"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"56a04028c7df","priority":"action","category":"runway","kind":"changed","summary":"runway 11/29 renumbered to 12/30 (now 3577x45 ft, was 3577x44)","source":"APT_RWY","fields":[{"field":"RWY_ID","old":"11/29","new":"12/30"}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"a59c4e4048f1","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: ACTVT MIRL RWY 12/30 - 122.8.","source":"APT_RMK","original":"ACTVT MIRL RWY 12/30 - 122.8.","fields":[{"field":"REMARK","old":"ACTVT MIRL RWY 11/29 - 122.8.","new":"ACTVT MIRL RWY 12/30 - 122.8."}]}],"first_cycle":"2025-05-15","last_cycle":"2026-09-03"}