{"schema_version":1,"airport":"7S4","entries":[{"cycle":"2026-06-11","from_cycle":"2026-05-14","id":"9691a6eb62b8","priority":"fyi","category":"airport","kind":"changed","summary":"airport phone number changed to 406-683-5242; airport contact address: PO BOX 67 -> 2400 AIRPORT RD; name changed: Bob Bell -> Josiah Jones; airport contact city: WISDOM -> DILLON; airport contact zip code: 59761 -> 59725","source":"APT_CON","fields":[{"field":"ADDRESS1","old":"PO BOX 67","new":"2400 AIRPORT RD"},{"field":"NAME","old":"BOB BELL","new":"JOSIAH JONES"},{"field":"PHONE_NO","old":"(406) 689-3299","new":"406-683-5242"},{"field":"TITLE_CITY","old":"WISDOM","new":"DILLON"},{"field":"ZIP_CODE","old":"59761","new":"59725"}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"d447807c34d0","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Runway 19 approach slope is 29:1 to the displaced threshold.","source":"APT_RMK","original":"RWY 19 APCH SLOPE 29:1 TO DSPLCD THLD.","fields":[{"field":"REMARK","old":"RY 19 APCH SLOPE 31:1 TO DSPLCD THLD.","new":"RWY 19 APCH SLOPE 29:1 TO DSPLCD THLD."}]},{"cycle":"2024-09-05","from_cycle":"2024-08-08","id":"4833059b9770","priority":"fyi","category":"runway","kind":"changed","summary":"runway 19: controlling obstacle changed (now 17 ft tall, 500 ft from threshold, 30 ft left of centerline, clearance slope 29:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"B","new":"L"},{"field":"CNTRLN_OFFSET","old":"0","new":"30"},{"field":"DIST_FROM_THR","old":"86","new":"500"},{"field":"OBSTN_CLNC_SLOPE","old":"5","new":"29"}]}],"first_cycle":"2024-09-05","last_cycle":"2026-06-11"}