{"schema_version":1,"airport":"MI57","entries":[{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"2c6aa3d34c25","priority":"action","category":"frequency","kind":"added","summary":"frequency 122.9 (CTAF) added","source":"FRQ"},{"cycle":"2025-10-02","from_cycle":"2025-09-04","id":"f52b3f5f3eb7","priority":"fyi","category":"runway","kind":"changed","summary":"runway H1: runway end elevation: none -> 605 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"","new":"605"}]}],"first_cycle":"2025-10-02","last_cycle":"2025-10-02"}