{"schema_version":1,"airport":"IOW","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"291e33d28881","priority":"ifr","category":"chart","kind":"changed","summary":"approach VOR-A redrawn (still amdt 1)","source":"D-TPP","chart":{"code":"IAP","name":"VOR-A","amdt":"1","pdf":"https://aeronav.faa.gov/d-tpp/2609/00682VA.PDF"}},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"5bc65a680ed6","priority":"fyi","category":"navaid","kind":"changed","summary":"IOW (Iowa City) navaid: simultaneous voice: yes -> no; voice call: FORT DODGE RADIO -> NONE","source":"NAV_BASE","fields":[{"field":"SIMUL_VOICE_FLAG","old":"Y","new":"N"},{"field":"VOICE_CALL","old":"FORT DODGE RADIO","new":"NONE"}]},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"54697767566b","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.1R via the Iowa City outlet no longer available","source":"FRQ"},{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"a73793f24087","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.3 via the Iowa City outlet no longer available","source":"FRQ"},{"cycle":"2026-04-16","from_cycle":"2026-03-19","id":"b6adf1e5c2a0","priority":"fyi","category":"runway","kind":"changed","summary":"runway 12: declared distances changed: takeoff run available (TORA) none -> 4,200 ft; takeoff distance available (TODA) none -> 4,200 ft; accelerate-stop distance available (ASDA) none -> 4,200 ft; landing distance available (LDA) none -> 3,700 ft","source":"APT_RWY_END","fields":[{"field":"ACLT_STOP_DIST_AVBL","old":"","new":"4200"},{"field":"LNDG_DIST_AVBL","old":"","new":"3700"},{"field":"TKOF_DIST_AVBL","old":"","new":"4200"},{"field":"TKOF_RUN_AVBL","old":"","new":"4200"}]},{"cycle":"2026-04-16","from_cycle":"2026-03-19","id":"8ddd68b4fd38","priority":"fyi","category":"runway","kind":"changed","summary":"runway 30: declared distances changed: takeoff run available (TORA) none -> 4,200 ft; takeoff distance available (TODA) none -> 4,200 ft; accelerate-stop distance available (ASDA) none -> 4,200 ft; landing distance available (LDA) none -> 3,900 ft","source":"APT_RWY_END","fields":[{"field":"ACLT_STOP_DIST_AVBL","old":"","new":"4200"},{"field":"LNDG_DIST_AVBL","old":"","new":"3900"},{"field":"TKOF_DIST_AVBL","old":"","new":"4200"},{"field":"TKOF_RUN_AVBL","old":"","new":"4200"}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"b1665b413578","priority":"fyi","category":"airport","kind":"changed","summary":"services: added air ambulance services (AMB)","source":"APT_BASE","fields":[{"field":"OTHER_SERVICES","old":"CHTR,INSTR,RNTL,SALES","new":"AMB,CHTR,INSTR,RNTL,SALES"}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"2e88cf5ac21c","priority":"fyi","category":"runway","kind":"changed","summary":"runway 25: controlling obstacle changed (now , clearance slope 34:1); controlling obstacle: TREE -> none","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":""},{"field":"CNTRLN_OFFSET","old":"50","new":""},{"field":"DIST_FROM_THR","old":"950","new":""},{"field":"OBSTN_CLNC_SLOPE","old":"16","new":"34"},{"field":"OBSTN_HGT","old":"46","new":""},{"field":"OBSTN_TYPE","old":"TREE","new":""}]},{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"d0d07083e1c0","priority":"fyi","category":"runway","kind":"changed","summary":"runway 12: displaced threshold elevation: 659 -> 658.9 ft MSL; runway end elevation: 661 -> 660.9 ft MSL; touchdown zone elevation: 659 -> 658.9 ft MSL","source":"APT_RWY_END","fields":[{"field":"DISPLACED_THR_ELEV","old":"659","new":"658.9"},{"field":"RWY_END_ELEV","old":"661","new":"660.9"},{"field":"TDZ_ELEV","old":"659","new":"658.9"}]},{"cycle":"2025-11-27","from_cycle":"2025-10-30","id":"8997b775bcbb","priority":"fyi","category":"runway","kind":"changed","summary":"runway 30: runway end elevation: 648.5 -> 648.4 ft MSL; touchdown zone elevation: 657.1 -> 657 ft MSL; threshold crossing height: 33 -> 38 ft AGL; visual glide path angle: 3 -> 3.5°","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"648.5","new":"648.4"},{"field":"TDZ_ELEV","old":"657.1","new":"657"},{"field":"THR_CROSSING_HGT","old":"33","new":"38"},{"field":"VISUAL_GLIDE_PATH_ANGLE","old":"3","new":"3.5"}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"5ffa5abf4cae","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Medium intensity runway lights runway 07/25 and 12/30 preset low intensity; to increase intensity and activate PAPI runway 07, 25, and 30; runway end identifier lights runway 07, 25, and 30 - CTAF.","source":"APT_RMK","original":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07, 25 & 30 - CTAF.","fields":[{"field":"REMARK","old":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF.","new":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07, 25 & 30 - CTAF."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"8a3fe5e4d41c","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: Runway 25 approach slope is 23:1 to the displaced threshold.","source":"APT_RMK","original":"RWY 25 APCH SLOPE 23:1 TO DTHR.","fields":[{"field":"REMARK","old":"RY 25 APCH SLOPE 23:1 TO DSPLCD THLD.","new":"RWY 25 APCH SLOPE 23:1 TO DTHR."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"bab3dcf97b06","priority":"fyi","category":"frequency","kind":"changed","summary":"remark: MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF. -> MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07, 25 & 30 - CTAF.","source":"FRQ","fields":[{"field":"REMARK","old":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF.","new":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07, 25 & 30 - CTAF."}]},{"cycle":"2024-12-26","from_cycle":"2024-11-28","id":"f6a866573463","priority":"fyi","category":"runway","kind":"changed","summary":"runway 30: runway end identifier lights (REIL): none -> yes","source":"APT_RWY_END","fields":[{"field":"RWY_END_LGTS_FLAG","old":"","new":"Y"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"bd15c0ef4da5","priority":"action","category":"runway","kind":"changed","summary":"runway 12/30: length: 3900 -> 4200 ft","source":"APT_RWY","fields":[{"field":"RWY_LEN","old":"3900","new":"4200"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"5c85eefbb7d6","priority":"action","category":"runway","kind":"changed","summary":"runway 12: displaced threshold elevation: none -> 659 ft MSL; displaced threshold: none -> 500 ft; runway end elevation: 661.3 -> 661 ft MSL; touchdown zone elevation: 661.3 -> 659 ft MSL","source":"APT_RWY_END","fields":[{"field":"DISPLACED_THR_ELEV","old":"","new":"659"},{"field":"DISPLACED_THR_LEN","old":"","new":"500"},{"field":"RWY_END_ELEV","old":"661.3","new":"661"},{"field":"TDZ_ELEV","old":"661.3","new":"659"}]},{"cycle":"2024-10-31","from_cycle":"2024-10-03","id":"6203deb64d3f","priority":"action","category":"runway","kind":"changed","summary":"runway 30: displaced threshold elevation: none -> 648.5 ft MSL; displaced threshold: none -> 300 ft; runway end elevation: 648.7 -> 648.5 ft MSL; touchdown zone elevation: 657 -> 657.1 ft MSL; threshold crossing height: 38 -> 33 ft AGL; visual glide path angle: 3.5 -> 3°","source":"APT_RWY_END","fields":[{"field":"DISPLACED_THR_ELEV","old":"","new":"648.5"},{"field":"DISPLACED_THR_LEN","old":"","new":"300"},{"field":"RWY_END_ELEV","old":"648.7","new":"648.5"},{"field":"TDZ_ELEV","old":"657","new":"657.1"},{"field":"THR_CROSSING_HGT","old":"38","new":"33"},{"field":"VISUAL_GLIDE_PATH_ANGLE","old":"3.5","new":"3"}]},{"cycle":"2024-10-03","from_cycle":"2024-09-05","id":"a0d0ab984d15","priority":"action","category":"remark","kind":"changed","summary":"remark updated: MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF.","source":"APT_RMK","original":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF.","fields":[{"field":"REMARK","old":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07 & 25; REIL RWY 07 & 25 - CTAF.","new":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF."}]},{"cycle":"2024-10-03","from_cycle":"2024-09-05","id":"0248d3fc7e41","priority":"action","category":"frequency","kind":"changed","summary":"remark: MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07 & 25; REIL RWY 07 & 25 - CTAF. -> MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF.","source":"FRQ","fields":[{"field":"REMARK","old":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07 & 25; REIL RWY 07 & 25 - CTAF.","new":"MIRL RWY 07/25 & 12/30 PRESET LOW INTST; TO INCR INTST & ACTVT PAPI RWY 07, 25 & 30; REIL RWY 07 & 25 - CTAF."}]},{"cycle":"2024-10-03","from_cycle":"2024-09-05","id":"798d609dabea","priority":"fyi","category":"runway","kind":"changed","summary":"runway 30: threshold crossing height: none -> 38 ft AGL; visual glide slope indicator: none -> 2-light PAPI on left side of runway (P2L); visual glide path angle: none -> 3.5°","source":"APT_RWY_END","fields":[{"field":"THR_CROSSING_HGT","old":"","new":"38"},{"field":"VGSI_CODE","old":"","new":"P2L"},{"field":"VISUAL_GLIDE_PATH_ANGLE","old":"","new":"3.5"}]}],"first_cycle":"2024-10-03","last_cycle":"2026-09-03"}