{"schema_version":1,"airport":"GGI","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"4b0894afda2b","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.6 via the Grinnell outlet no longer available","source":"FRQ"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"422996724348","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: For clearance contact CHICAGO ARTCC at 630-906-8921.","source":"APT_RMK","original":"FOR CD CTC CHICAGO ARTCC AT 630-906-8921.","fields":[{"field":"REMARK","old":"FOR CD IF UNA TO CTC ON FSS FREQ, CTC CHICAGO ARTCC AT 630-906-8921.","new":"FOR CD CTC CHICAGO ARTCC AT 630-906-8921."}]},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"48c3da41c647","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 13 amended (amdt 1A)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 13","amdt":"1A","pdf":"https://aeronav.faa.gov/d-tpp/2607/06893R13.PDF"}},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"5615049dc8f8","priority":"ifr","category":"chart","kind":"changed","summary":"approach RNAV (GPS) RWY 31 redrawn (still amdt 1A)","source":"D-TPP","chart":{"code":"IAP","name":"RNAV (GPS) RWY 31","amdt":"1A","pdf":"https://aeronav.faa.gov/d-tpp/2607/06893R31.PDF"}},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"714052371794","priority":"ifr","category":"chart","kind":"changed","summary":"approach VOR/DME RWY 31 redrawn (still amdt 4)","source":"D-TPP","chart":{"code":"IAP","name":"VOR/DME RWY 31","amdt":"4","pdf":"https://aeronav.faa.gov/d-tpp/2607/06893VD31.PDF"}}],"first_cycle":"2026-07-09","last_cycle":"2026-09-03"}