{"schema_version":1,"airport":"SIF","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"f786218876ed","priority":"action","category":"navaid","kind":"removed","summary":"SIF NDB (423) decommissioned/removed","source":"NAV_BASE"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"6f6fb672eff7","priority":"action","category":"frequency","kind":"removed","summary":"frequency 423.0 (SIF NDB) removed","source":"FRQ"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"2fb6b5109c06","priority":"ifr","category":"chart","kind":"changed","summary":"approach VOR-A redrawn (still amdt 11)","source":"D-TPP","chart":{"code":"IAP","name":"VOR-A","amdt":"11","pdf":"https://aeronav.faa.gov/d-tpp/2609/06329VA.PDF"}},{"cycle":"2026-06-11","from_cycle":"2026-05-14","id":"00545c69ff84","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: APCH RATIO 11:1 AT DSPLCD THR; DUE TO 80 FT TREES 1149 FT FROM DSPLCD THR 261 FT RIGHT OF CNTRLN.","source":"APT_RMK","original":"APCH RATIO 11:1 AT DSPLCD THR; DUE TO 80 FT TREES 1149 FT FROM DSPLCD THR 261 FT RIGHT OF CNTRLN.","fields":[{"field":"REMARK","old":"APCH RATIO 10:1 AT DSPLCD THR; DUE TO 89 FT TREES 1156 FT FROM DSPLCD THR 318 FT RIGHT OF CNTRLN.","new":"APCH RATIO 11:1 AT DSPLCD THR; DUE TO 80 FT TREES 1149 FT FROM DSPLCD THR 261 FT RIGHT OF CNTRLN."}]},{"cycle":"2026-06-11","from_cycle":"2026-05-14","id":"8f29f604909f","priority":"fyi","category":"runway","kind":"changed","summary":"runway 13: controlling obstacle changed (now 71 ft tall, 646 ft from threshold, 298 ft right of centerline, clearance slope 6:1); markings now in fair condition","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"320","new":"298"},{"field":"DIST_FROM_THR","old":"671","new":"646"},{"field":"OBSTN_CLNC_SLOPE","old":"5","new":"6"},{"field":"OBSTN_HGT","old":"83","new":"71"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]},{"cycle":"2026-06-11","from_cycle":"2026-05-14","id":"a507f83208ba","priority":"fyi","category":"runway","kind":"changed","summary":"runway 31: controlling obstacle changed (now 41 ft tall, 771 ft from threshold, 299 ft right of centerline, clearance slope 13:1); markings now in fair condition","source":"APT_RWY_END","fields":[{"field":"CNTRLN_OFFSET","old":"211","new":"299"},{"field":"DIST_FROM_THR","old":"893","new":"771"},{"field":"OBSTN_CLNC_SLOPE","old":"12","new":"13"},{"field":"OBSTN_HGT","old":"55","new":"41"},{"field":"RWY_MARKING_COND","old":"GOOD","new":"FAIR"}]}],"first_cycle":"2026-06-11","last_cycle":"2026-09-03"}