{"schema_version":1,"airport":"MSO","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"d18230faab73","priority":"action","category":"remark","kind":"added","summary":"new remark: FOR CD WHEN ATCT CLSD CTC SPOKANE APCH AT 509-742-2522, WHEN APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568.","source":"APT_RMK","original":"FOR CD WHEN ATCT CLSD CTC SPOKANE APCH AT 509-742-2522, WHEN APCH CLSD CTC SALT LAKE ARTCC AT 801-320-2568."},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"723c7dd9f9ec","priority":"action","category":"remark","kind":"removed","summary":"remark removed: COMMUNICATIONS PRVDD BY GREAT FALLS RADIO ON FREQ 122.2 (MILLER PEAK RCO).","source":"ATC_RMK","original":"COMMUNICATIONS PRVDD BY GREAT FALLS RADIO ON FREQ 122.2 (MILLER PEAK RCO)."},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"64a11de7f3e6","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.2 via the Miller Peak outlet no longer available","source":"FRQ"},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"5c6f282f8dd3","priority":"fyi","category":"airport","kind":"changed","summary":"Part 139 ARFF certification: I B -> I C","source":"APT_BASE","fields":[{"field":"FAR_139_TYPE_CODE","old":"I B","new":"I C"}]},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"ed538ba90b58","priority":"action","category":"remark","kind":"added","summary":"new remark: RWY 8/26 CLSD PERM","source":"APT_RMK","original":"RWY 8/26 CLSD PERM"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"68ba6019063a","priority":"action","category":"remark","kind":"removed","summary":"remark removed: CLSD PERMLY .","source":"APT_RMK","original":"CLSD PERMLY ."},{"cycle":"2025-09-04","from_cycle":"2025-08-07","id":"7f6c75c6cb0e","priority":"action","category":"remark","kind":"changed","summary":"remark updated: CLSD PERMLY .","source":"APT_RMK","original":"CLSD PERMLY .","fields":[{"field":"REMARK","old":"WHEN TWR CLSD RWY 08/26 CLSD EXC TAXI .","new":"CLSD PERMLY ."}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"77034dde7dbb","priority":"fyi","category":"airport","kind":"changed","summary":"cold temperature airport (altitude correction at or below): -12C -> -11C","source":"APT_BASE","fields":[{"field":"CTA","old":"-12C","new":"-11C"}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"58c3c78a5c3d","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -11C.","source":"APT_RMK","original":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -11C.","fields":[{"field":"REMARK","old":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -12C.","new":"COLD TEMPERATURE AIRPORT. ALTITUDE CORRECTION REQUIRED AT OR BELOW -11C."}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"ab0ceb3691c2","priority":"action","category":"weather","kind":"changed","summary":"AWOS/ASOS phone number changed to 406-213-9541","source":"AWOS","fields":[{"field":"PHONE_NO","old":"406-728-3743","new":"406-213-9541"}]},{"cycle":"2025-02-20","from_cycle":"2025-01-23","id":"b4a5d97b1b26","priority":"ifr","category":"procedure","kind":"changed","summary":"arrival/departure procedures new or updated: MSO","source":"STAR/DP","procedures":{"updated":["MSO"],"removed":[]}},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"c259fb5819f5","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Landing fee applies for all commercial aircraft and all aircraft over 9,000 pounds.","source":"APT_RMK","original":"LDG FEE FOR ALL COML ACFT AND ALL ACFT OVER 9,000 LBS.","fields":[{"field":"REMARK","old":"LDG FEE FOR ALL COML ACFT AND ALL ACFT OVER 12,500 LBS.","new":"LDG FEE FOR ALL COML ACFT AND ALL ACFT OVER 9,000 LBS."}]}],"first_cycle":"2024-10-31","last_cycle":"2026-09-03"}