{"schema_version":1,"airport":"OLF","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"c044793a449f","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.2 via the Wolf Point outlet no longer available","source":"FRQ"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"b77bfb901671","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":"b619e3597320","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 11 redrawn (still amdt 1B)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 11","amdt":"1B","pdf":"https://aeronav.faa.gov/d-tpp/2607/06018R11.PDF"}},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"77d51b6b4a83","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 29 redrawn (still amdt 1B)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 29","amdt":"1B","pdf":"https://aeronav.faa.gov/d-tpp/2607/06018R29.PDF"}},{"cycle":"2026-03-19","from_cycle":"2026-02-19","id":"e694f29918d2","priority":"action","category":"weather","kind":"changed","summary":"AWOS/ASOS phone number changed to 406-662-4397","source":"AWOS","fields":[{"field":"PHONE_NO","old":"406-653-3865","new":"406-662-4397"}]}],"first_cycle":"2026-03-19","last_cycle":"2026-09-03"}