{"schema_version":1,"airport":"97M","entries":[{"cycle":"2026-10-01","from_cycle":"2026-09-03","engine":"1.3.8","id":"bdfe57b23096","priority":"fyi","category":"remark","kind":"changed","summary":"revised remark: PAPI runway 13 and 31; medium intensity runway lights 13/31 preset medium intensity from dusk to 0000, other hours activate on CTAF.","source":"APT_RMK","original":"PAPI RWY 13 & 31; MIRL RWY 13/31 PRESET MED INTST FM DUSK-0000. OTR HRS ACTVT - CTAF.","fields":[{"field":"REMARK","old":"DUSK-0000. MIRL RWY 13/31 & PAPI RWYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF.","new":"PAPI RWY 13 & 31; MIRL RWY 13/31 PRESET MED INTST FM DUSK-0000. OTR HRS ACTVT - CTAF."}]},{"cycle":"2026-10-01","from_cycle":"2026-09-03","engine":"1.3.8","id":"c018999cc3c2","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13: markings: basic (BSC) -> nonprecision instrument (NPI)","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_TYPE_CODE","old":"BSC","new":"NPI"}]},{"cycle":"2026-10-01","from_cycle":"2026-09-03","engine":"1.3.8","id":"339fb3a6cfbd","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: markings: basic (BSC) -> nonprecision instrument (NPI)","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_TYPE_CODE","old":"BSC","new":"NPI"}]},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"e7f8bf6adb25","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.3 via the Tower Hill outlet no longer available","source":"FRQ"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"88c081fefe6d","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.","source":"APT_RMK","original":"FOR CD CTC SALT LAKE ARTCC AT 801-320-2568.","fields":[{"field":"REMARK","old":"FOR CD IF UNA TO CTC ON FSS FREQ, CTC SALT LAKE ARTCC AT 801-320-2568.","new":"FOR CD CTC SALT LAKE ARTCC AT 801-320-2568."}]},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"8797265161ad","priority":"fyi","category":"weather","kind":"added","summary":"new weather station: AWOS-3PT (97M), phone 406-775-6028","source":"AWOS","fields":[{"field":"ASOS_AWOS_ID","old":"","new":"97M"},{"field":"ASOS_AWOS_TYPE","old":"","new":"AWOS-3PT"},{"field":"NAVAID_FLAG","old":"","new":"N"},{"field":"PHONE_NO","old":"","new":"406-775-6028"}]},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"29634cef4adc","priority":"action","category":"frequency","kind":"added","summary":"frequency 118.1 (97M AWOS-3PT) added","source":"FRQ"},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"4bde0875178c","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 13 redrawn (still original)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 13","amdt":"0","pdf":"https://aeronav.faa.gov/d-tpp/2607/10497R13.PDF"}},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"b0946efb9ac1","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 31 redrawn (still original)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 31","amdt":"0","pdf":"https://aeronav.faa.gov/d-tpp/2607/10497R31.PDF"}},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"57406b331fe4","priority":"fyi","category":"airport","kind":"changed","summary":"NOTAM facility: GTF -> 97M","source":"APT_BASE","fields":[{"field":"NOTAM_ID","old":"GTF","new":"97M"}]},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"2c01acdf4bbb","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13/31: pavement now in good condition","source":"APT_RWY","fields":[{"field":"COND","old":"FAIR","new":"GOOD"}]},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"d68a53ac3865","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13: markings now in good condition","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_COND","old":"FAIR","new":"GOOD"}]},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"bd0e3cb1a3c7","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: markings now in good condition","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_COND","old":"FAIR","new":"GOOD"}]},{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"73af7835c292","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13/31: pavement now in fair condition","source":"APT_RWY","fields":[{"field":"COND","old":"EXCELLENT","new":"FAIR"}]},{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"e7cb47dd0a70","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13: markings now in fair condition","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"493394c17736","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: markings now in fair condition","source":"APT_RWY_END","fields":[{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"5d4063c20a4f","priority":"ifr","category":"tower","kind":"added","summary":"approach/departure control listed: SALT LAKE ARTCC (ZLC)","source":"ATC_BASE","fields":[{"field":"FACILITY_TYPE","old":"","new":"NON-ATCT"},{"field":"FACILITY_ID","old":"","new":"97M"},{"field":"FACILITY_NAME","old":"","new":"EKALAKA"},{"field":"REGION_CODE","old":"","new":"ANM"},{"field":"PRIMARY_APCH_RADIO_CALL","old":"","new":"SALT LAKE ARTCC"},{"field":"APCH_P_PROVIDER","old":"","new":"ZLC"}]},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"63b6bf70fff7","priority":"action","category":"frequency","kind":"added","summary":"frequency 126.85 (MILES CITY RCAG) added","source":"FRQ"},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"16251ede60c7","priority":"action","category":"frequency","kind":"added","summary":"frequency 305.2 (MILES CITY RCAG) added","source":"FRQ"},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"934f79f60443","priority":"action","category":"remark","kind":"added","summary":"new remark: APCH/DEP SVC PRVDD BY SALT LAKE ARTCC (ZLC) ON FREQS 126.85/305.2 (MILES CITY RCAG).","source":"ATC_RMK","original":"APCH/DEP SVC PRVDD BY SALT LAKE ARTCC (ZLC) ON FREQS 126.85/305.2 (MILES CITY RCAG)."},{"cycle":"2025-01-23","from_cycle":"2024-12-26","id":"afced1488f43","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: DUSK-0000. MIRL RWY 13/31 & PAPI RWYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF.","source":"APT_RMK","original":"DUSK-0000. MIRL RWY 13/31 & PAPI RWYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF.","fields":[{"field":"REMARK","old":"DUSK-0000. MIRL RY 13/31 & PAPI RYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF.","new":"DUSK-0000. MIRL RWY 13/31 & PAPI RWYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF."}]},{"cycle":"2025-01-23","from_cycle":"2024-12-26","id":"769bd0877397","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: 80 FT TALL HILLS IN TRANSITIONAL SURFACE, SOUTH SIDE OF APT, 700 FT FM RWY EDGE.","source":"APT_RMK","original":"80 FT TALL HILLS IN TRANSITIONAL SURFACE, SOUTH SIDE OF APT, 700 FT FM RWY EDGE.","fields":[{"field":"REMARK","old":"80' TALL HILLS IN TRANSITIONAL SURFACE, SOUTH SIDE OF APT, 700' FROM RWY EDGE","new":"80 FT TALL HILLS IN TRANSITIONAL SURFACE, SOUTH SIDE OF APT, 700 FT FM RWY EDGE."}]},{"cycle":"2025-01-23","from_cycle":"2024-12-26","id":"25a05876cb0f","priority":"fyi","category":"frequency","kind":"changed","summary":"remark: DUSK-0000. MIRL RY 13/31 & PAPI RYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF. -> DUSK-0000. MIRL RWY 13/31 & PAPI RWYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF.","source":"FRQ","fields":[{"field":"REMARK","old":"DUSK-0000. MIRL RY 13/31 & PAPI RYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF.","new":"DUSK-0000. MIRL RWY 13/31 & PAPI RWYS 13 & 31 PRESET MEDIUM INTST DUSK-0000; OTHER HRS ACTVT - CTAF."}]}],"first_cycle":"2025-01-23","last_cycle":"2026-10-01"}