{"schema_version":1,"airport":"BTL","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"e30f75e2390a","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.2 via the Battle Creek outlet no longer available","source":"FRQ"},{"cycle":"2026-07-09","from_cycle":"2026-06-11","id":"ccf18da30559","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/2607/00041R31.PDF"}},{"cycle":"2026-05-14","from_cycle":"2026-04-16","id":"8cf298044282","priority":"action","category":"frequency","kind":"removed","summary":"frequency 119.2 (APCH/P DEP/P) removed","source":"FRQ"},{"cycle":"2026-05-14","from_cycle":"2026-04-16","id":"5981a3144c4e","priority":"action","category":"frequency","kind":"added","summary":"frequency 121.2 (APCH/P DEP/P) added","source":"FRQ"},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"f45dae98cdc8","priority":"action","category":"weather","kind":"changed","summary":"remark: ASOS FREQ U/S INDEFLY. -> ASOS FONE OTS INDEFLY.","source":"AWOS","fields":[{"field":"REMARK","old":"ASOS FREQ U/S INDEFLY.","new":"ASOS FONE OTS INDEFLY."}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"383e2fd59543","priority":"action","category":"runway","kind":"changed","summary":"runway 13/31: length: 4835 -> 4837 ft","source":"APT_RWY","fields":[{"field":"RWY_LEN","old":"4835","new":"4837"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"5434a7bf8d85","priority":"fyi","category":"runway","kind":"changed","summary":"runway 05L: runway end elevation: 951.8 -> 951.6 ft MSL; touchdown zone elevation: 951.8 -> 951.6 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"951.8","new":"951.6"},{"field":"TDZ_ELEV","old":"951.8","new":"951.6"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"83731f10d272","priority":"fyi","category":"runway","kind":"changed","summary":"runway 05R: runway end elevation: 925 -> 924.8 ft MSL; touchdown zone elevation: 926.9 -> 926.8 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"925","new":"924.8"},{"field":"TDZ_ELEV","old":"926.9","new":"926.8"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"241c56df8e36","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13: declared distances changed: takeoff run available (TORA) 4,835 ft -> 4,837 ft; takeoff distance available (TODA) 4,835 ft -> 4,837 ft; accelerate-stop distance available (ASDA) 4,835 ft -> 4,837 ft; landing distance available (LDA) 4,835 ft -> 4,837 ft; runway end elevation: 919.8 -> 919.6 ft MSL; touchdown zone elevation: 926.5 -> 926.2 ft MSL","source":"APT_RWY_END","fields":[{"field":"ACLT_STOP_DIST_AVBL","old":"4835","new":"4837"},{"field":"LNDG_DIST_AVBL","old":"4835","new":"4837"},{"field":"RWY_END_ELEV","old":"919.8","new":"919.6"},{"field":"TDZ_ELEV","old":"926.5","new":"926.2"},{"field":"TKOF_DIST_AVBL","old":"4835","new":"4837"},{"field":"TKOF_RUN_AVBL","old":"4835","new":"4837"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"715f66b7f567","priority":"fyi","category":"runway","kind":"changed","summary":"runway 23L: runway end elevation: 930 -> 929.7 ft MSL; touchdown zone elevation: 930 -> 929.7 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"930","new":"929.7"},{"field":"TDZ_ELEV","old":"930","new":"929.7"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"aaf73ebd5c21","priority":"fyi","category":"runway","kind":"changed","summary":"runway 23R: runway end elevation: 928.4 -> 928.1 ft MSL; touchdown zone elevation: 928.8 -> 928.9 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"928.4","new":"928.1"},{"field":"TDZ_ELEV","old":"928.8","new":"928.9"}]},{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"1a4a3f70aafc","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: declared distances changed: takeoff run available (TORA) 4,835 ft -> 4,837 ft; takeoff distance available (TODA) 4,835 ft -> 4,837 ft; accelerate-stop distance available (ASDA) 4,835 ft -> 4,837 ft; landing distance available (LDA) 4,835 ft -> 4,837 ft; runway end elevation: 929.4 -> 929.2 ft MSL; touchdown zone elevation: 930.1 -> 929.6 ft MSL","source":"APT_RWY_END","fields":[{"field":"ACLT_STOP_DIST_AVBL","old":"4835","new":"4837"},{"field":"LNDG_DIST_AVBL","old":"4835","new":"4837"},{"field":"RWY_END_ELEV","old":"929.4","new":"929.2"},{"field":"TDZ_ELEV","old":"930.1","new":"929.6"},{"field":"TKOF_DIST_AVBL","old":"4835","new":"4837"},{"field":"TKOF_RUN_AVBL","old":"4835","new":"4837"}]},{"cycle":"2025-01-23","from_cycle":"2024-12-26","id":"9d5d6241ad20","priority":"fyi","category":"tower","kind":"added","summary":"new ATIS (hours 24)","source":"ATC_ATIS","fields":[{"field":"FACILITY_TYPE","old":"","new":"ATCT"},{"field":"FACILITY_ID","old":"","new":"BTL"},{"field":"ATIS_NO","old":"","new":"1"},{"field":"ATIS_HRS","old":"","new":"24"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"a7f7d5a069f1","priority":"fyi","category":"remark","kind":"added","summary":"new remark: EXTSV CRACKING & VEGETATION.","source":"APT_RMK","original":"EXTSV CRACKING & VEGETATION."},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"06260a9a8b73","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Deer and large birds on and in vicinity of airport.","source":"APT_RMK","original":"DEER & LRG BIRDS ON & INVOF ARPT.","fields":[{"field":"REMARK","old":"DEER & BIRDS ON & INVOF ARPT.","new":"DEER & LRG BIRDS ON & INVOF ARPT."}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"5a3791c52d6a","priority":"fyi","category":"runway","kind":"changed","summary":"runway 05L: controlling obstacle changed (now 102 ft tall, 3231 ft from threshold, 500 ft left of centerline, clearance slope 29:1); markings now in fair condition; controlling obstacle: none -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"L"},{"field":"CNTRLN_OFFSET","old":"","new":"500"},{"field":"DIST_FROM_THR","old":"","new":"3231"},{"field":"OBSTN_CLNC_SLOPE","old":"50","new":"29"},{"field":"OBSTN_HGT","old":"","new":"102"},{"field":"OBSTN_TYPE","old":"","new":"TREE"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"5222c5e343a7","priority":"fyi","category":"runway","kind":"changed","summary":"runway 05R/23L: pavement now in poor condition","source":"APT_RWY","fields":[{"field":"COND","old":"","new":"POOR"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"cae6bba6bc8f","priority":"fyi","category":"runway","kind":"changed","summary":"runway 05R: controlling obstacle changed (now 49 ft tall, 1276 ft from threshold, 33 ft right of centerline, clearance slope 21:1); markings now in fair condition; controlling obstacle: none -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"R"},{"field":"CNTRLN_OFFSET","old":"","new":"33"},{"field":"DIST_FROM_THR","old":"","new":"1276"},{"field":"OBSTN_CLNC_SLOPE","old":"","new":"21"},{"field":"OBSTN_HGT","old":"","new":"49"},{"field":"OBSTN_TYPE","old":"","new":"TREE"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"27c30f742c2d","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13: controlling obstacle changed (now 17 ft tall, 474 ft from threshold, 57 ft right of centerline, clearance slope 16:1); markings now in fair condition; controlling obstacle: RR -> POLE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"281","new":"57"},{"field":"DIST_FROM_THR","old":"601","new":"474"},{"field":"OBSTN_CLNC_SLOPE","old":"20","new":"16"},{"field":"OBSTN_HGT","old":"20","new":"17"},{"field":"OBSTN_TYPE","old":"RR","new":"POLE"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"e8b375617020","priority":"fyi","category":"runway","kind":"changed","summary":"runway 23L: controlling obstacle changed (now 74 ft tall, 1836 ft from threshold, 86 ft right of centerline, clearance slope 22:1); markings now in fair condition; controlling obstacle: none -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"","new":"R"},{"field":"CNTRLN_OFFSET","old":"","new":"86"},{"field":"DIST_FROM_THR","old":"","new":"1836"},{"field":"OBSTN_CLNC_SLOPE","old":"","new":"22"},{"field":"OBSTN_HGT","old":"","new":"74"},{"field":"OBSTN_TYPE","old":"","new":"TREE"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"c38ea0a9abde","priority":"fyi","category":"runway","kind":"changed","summary":"runway 23R: controlling obstacle changed (now 44 ft tall, 1052 ft from threshold, 591 ft right of centerline, clearance slope 19:1); markings now in fair condition; controlling obstacle: POLE -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"288","new":"591"},{"field":"DIST_FROM_THR","old":"1033","new":"1052"},{"field":"OBSTN_CLNC_SLOPE","old":"43","new":"19"},{"field":"OBSTN_HGT","old":"19","new":"44"},{"field":"OBSTN_TYPE","old":"POLE","new":"TREE"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"6cdcd0702442","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: controlling obstacle changed (now 34 ft tall, 675 ft from threshold, 250 ft right of centerline, clearance slope 13:1); markings now in fair condition; controlling obstacle: ROAD -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"6","new":"250"},{"field":"DIST_FROM_THR","old":"530","new":"675"},{"field":"OBSTN_CLNC_SLOPE","old":"22","new":"13"},{"field":"OBSTN_HGT","old":"15","new":"34"},{"field":"OBSTN_TYPE","old":"ROAD","new":"TREE"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]}],"first_cycle":"2024-10-31","last_cycle":"2026-09-03"}