{"schema_version":1,"airport":"S69","entries":[{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"16a8358a0baa","priority":"ifr","category":"tower","kind":"added","summary":"approach/departure control listed: HELENA (HLN)","source":"ATC_BASE","fields":[{"field":"FACILITY_TYPE","old":"","new":"NON-ATCT"},{"field":"FACILITY_ID","old":"","new":"S69"},{"field":"FACILITY_NAME","old":"","new":"LINCOLN"},{"field":"REGION_CODE","old":"","new":"ANM"},{"field":"PRIMARY_APCH_RADIO_CALL","old":"","new":"HELENA"},{"field":"APCH_P_PROVIDER","old":"","new":"HLN"}]},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"e8f56163b506","priority":"action","category":"frequency","kind":"added","summary":"frequency 119.5 (APCH/P DEP/P) added","source":"FRQ"},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"a3799d609586","priority":"action","category":"frequency","kind":"added","summary":"frequency 133.4 (BUTTE RCAG) added","source":"FRQ"},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"ac3367155e0c","priority":"action","category":"frequency","kind":"added","summary":"frequency 229.4 (APCH/P DEP/P) added","source":"FRQ"},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"61e73a8dd9bc","priority":"action","category":"frequency","kind":"added","summary":"frequency 285.4 (BUTTE RCAG) added","source":"FRQ"},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"936864146c07","priority":"action","category":"remark","kind":"added","summary":"new remark: APCH/DEP SVC PRVDD BY SALT LAKE ARTCC (ZLC) ON FREQS 133.4/285.4 (BUTTE RCAG) WHEN HELENA APCH CLSD.","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY SALT LAKE ARTCC (ZLC) ON FREQS 133.4/285.4 (BUTTE RCAG) WHEN HELENA APCH CLSD."},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"c093490b7ae0","priority":"ifr","category":"procedure","kind":"changed","summary":"arrival/departure procedures new or updated: AXLES","source":"STAR/DP","procedures":{"updated":["AXLES"],"removed":[]}},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"d78025293e09","priority":"action","category":"remark","kind":"added","summary":"new remark: WX ADVISORY AVAIL ON CTAF - 4 CLICKS.","source":"APT_RMK","original":"WX ADVISORY AVAIL ON CTAF - 4 CLICKS."},{"cycle":"2025-06-12","from_cycle":"2025-05-15","id":"71346d5964ff","priority":"action","category":"frequency","kind":"changed","summary":"remark: ACTVT PAPI RWY 04; MIRL RWY 04/22 - CTAF. -> ACTVT PAPI RWY 04; MIRL RWY 04/22 - CTAF.; WX ADVISORY AVAIL ON CTAF - 4 CLICKS.","source":"FRQ","fields":[{"field":"REMARK","old":"ACTVT PAPI RWY 04; MIRL RWY 04/22 - CTAF.","new":"ACTVT PAPI RWY 04; MIRL RWY 04/22 - CTAF.; WX ADVISORY AVAIL ON CTAF - 4 CLICKS."}]},{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"4fbd1a551858","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: SFC COND UNMON 1600-0900. IREG SN REMOVAL. SEE HTTPS://WEATHERCAMS.FAA.GOV/","source":"APT_RMK","original":"SFC COND UNMON 1600-0900. IREG SN REMOVAL. SEE HTTPS://WEATHERCAMS.FAA.GOV/","fields":[{"field":"REMARK","old":"SFC COND UNMON 600-0900. INTMT SN REMOVAL.","new":"SFC COND UNMON 1600-0900. IREG SN REMOVAL. SEE HTTPS://WEATHERCAMS.FAA.GOV/"}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"783611a11e48","priority":"fyi","category":"airport","kind":"changed","summary":"airframe repair: none -> none; bottled oxygen: none -> none; bulk oxygen: none -> none; engine repair: none -> none","source":"APT_BASE","fields":[{"field":"AIRFRAME_REPAIR_SER_CODE","old":"NONE","new":""},{"field":"BOTTLED_OXY_TYPE","old":"NONE","new":""},{"field":"BULK_OXY_TYPE","old":"NONE","new":""},{"field":"PWR_PLANT_REPAIR_SER","old":"NONE","new":""}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"2513a23fb125","priority":"fyi","category":"remark","kind":"added","summary":"new remark: Trees in transition surface both sides full length.","source":"APT_RMK","original":"TREES IN TRSN SFC BOTH SIDES FULL LEN."},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"fe5f22802d42","priority":"fyi","category":"remark","kind":"removed","summary":"remark removed: Trees in transition surface both sides of runway full length.","source":"APT_RMK","original":"TREES IN TRANSITION SFC BOTH SIDES OF RY FULL LENGTH."},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"897ff3eca2a0","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: A 9 foot perimeter fence.","source":"APT_RMK","original":"9 FT PERIMETER FENCE.","fields":[{"field":"REMARK","old":"9 FT WILDLIFE PERIMETER FENCE.","new":"9 FT PERIMETER FENCE."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"6bebeea09db8","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Helicopter operations in the vicinity of the airport during summer.","source":"APT_RMK","original":"HEL OPS INVOF ARPT DURG SUMMER.","fields":[{"field":"REMARK","old":"POSSIBLE HEAVY HELICOPTER USE DURING SUMMER.","new":"HEL OPS INVOF ARPT DURG SUMMER."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"6059a664e54d","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: SFC COND UNMON 600-0900. INTMT SN REMOVAL.","source":"APT_RMK","original":"SFC COND UNMON 600-0900. INTMT SN REMOVAL.","fields":[{"field":"REMARK","old":"INTMT SN REMOVAL.","new":"SFC COND UNMON 600-0900. INTMT SN REMOVAL."}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"78cc5121bfc6","priority":"fyi","category":"runway","kind":"changed","summary":"runway 04: controlling obstacle changed (now 101 ft tall, 1060 ft from threshold, 150 ft either side of centerline, clearance slope 8:1)","source":"APT_RWY_END","fields":[{"field":"DIST_FROM_THR","old":"1159","new":"1060"},{"field":"OBSTN_CLNC_SLOPE","old":"9","new":"8"}]},{"cycle":"2024-11-28","from_cycle":"2024-10-31","id":"3ac99c4856fa","priority":"fyi","category":"runway","kind":"changed","summary":"runway 22: controlling obstacle changed (now 90 ft tall, 1221 ft from threshold, 330 ft off centerline, clearance slope 11:1)","source":"APT_RWY_END","fields":[{"field":"OBSTN_HGT","old":"89","new":"90"}]}],"first_cycle":"2024-11-28","last_cycle":"2026-03-19"}