{"schema_version":1,"airport":"6D6","entries":[{"cycle":"2025-04-17","from_cycle":"2025-03-20","id":"68abb9eedcd7","priority":"fyi","category":"frequency","kind":"added","summary":"frequency 257.6 now also listed for GRAND RAPIDS RCAG","source":"FRQ"},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"77c77616f085","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: A controlling obstacle exceeds a 45 degree slope.","source":"APT_RMK","original":"CTLG OBSTN EXCEEDS A 45 DEG SLP.","fields":[{"field":"REMARK","old":"APCH RATIO 3:1 TO DTHR OVR 64 FT TREE, 245 FT DIST, 145 FT L.","new":"CTLG OBSTN EXCEEDS A 45 DEG SLP."}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"f7ba68f50bd4","priority":"fyi","category":"runway","kind":"changed","summary":"runway 10: controlling obstacle changed (now 17 ft tall, 227 ft from threshold, 258 ft right of centerline, clearance slope 1:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"390","new":"258"},{"field":"DIST_FROM_THR","old":"1140","new":"227"},{"field":"OBSTN_CLNC_SLOPE","old":"11","new":"1"},{"field":"OBSTN_HGT","old":"82","new":"17"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"4566bb79e0ab","priority":"fyi","category":"runway","kind":"changed","summary":"runway 18: controlling obstacle changed (now 52 ft tall, 0 ft from threshold, 125 ft right of centerline, clearance slope 0:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":"R"},{"field":"DIST_FROM_THR","old":"80","new":"0"},{"field":"OBSTN_CLNC_SLOPE","old":"2","new":"0"},{"field":"OBSTN_HGT","old":"40","new":"52"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"771e6c5a060b","priority":"fyi","category":"runway","kind":"changed","summary":"runway 28: controlling obstacle changed (now 38 ft tall, 656 ft from threshold, 176 ft right of centerline, clearance slope 12:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"20","new":"176"},{"field":"DIST_FROM_THR","old":"598","new":"656"},{"field":"OBSTN_CLNC_SLOPE","old":"14","new":"12"},{"field":"OBSTN_HGT","old":"28","new":"38"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"94d27ce3a402","priority":"fyi","category":"runway","kind":"changed","summary":"runway 36: controlling obstacle changed (now 40 ft tall, 364 ft from threshold, 173 ft right of centerline, clearance slope 9:1)","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"80","new":"173"},{"field":"DIST_FROM_THR","old":"826","new":"364"},{"field":"OBSTN_CLNC_SLOPE","old":"10","new":"9"},{"field":"OBSTN_HGT","old":"82","new":"40"}]}],"first_cycle":"2024-10-31","last_cycle":"2025-04-17"}