{"schema_version":1,"from_cycle":"2026-10-01","to_cycle":"2026-10-29","airport":"ORD","counts":{"action":1,"ifr":2,"fyi":3},"changes":[{"id":"7442bbe8111d","priority":"action","category":"frequency","kind":"changed","summary":"Chicago departure frequency (primary; FAA: DEP/P): 351.675 -> 340.2","source":"FRQ","fields":[{"field":"FREQ","old":"351.675","new":"340.2"}]},{"id":"428aeb092854","priority":"ifr","category":"route","kind":"changed","summary":"preferred IFR routes: 7 changed, 2 removed","source":"PFR","details":["preferred IFR route CLE -> ORD: new routing CLE GTLKE6 DAIFE WATSN WATSN4 ORD; aircraft RNAV ONLY -> RNAV 1 - DME/DME/IRU OR GPS; area FROM CLEVELAND METRO(CLE,CGF,BKL,LNN,LPR) -> FROM CLE,CGF,LNN,LPR","preferred IFR route MSP -> ORD [type H] via MSP RST1 RST DBQ JVL JVL1 ORD: discontinued","preferred IFR route MSP -> ORD [type L] via MSP RST1 RST DBQ JVL JVL1 ORD: discontinued","preferred IFR route MSP -> ORD: new routing MSP TOTTZ1 ZZIPR FYTTE7 ORD; aircraft TURBOJET -> RNAV 1 - DME/DME/IRU OR GPS; area none -> FROM ANE, FCM, MSP STP","preferred IFR route ORD -> BCT: new routing ORD DENNT DARCY DREGS DUMGE SCOTO SWAPP Q79 ZPLEN VUUDU3 BCT; aircraft none -> JET ONLY, RNAV 1 - DME/DME/IRU OR GPS.; area none -> TO 06FA, BCT, F45, DJT, SUA","preferred IFR route ORD -> DET: new routing ORD DUFEE LOGGR HOSSA PETTE3 DET; area TO DETROIT SATS(DET,ARB,PTK,YIP,CYQG) -> TO ARB, CYQG, DET, MTC, ONZ, OZW, PTK, TTF, VLL, YIP","preferred IFR route ORD -> DJT: new routing ORD DENNT DARCY DREGS DUMGE SCOTO SWAPP Q79 ZPLEN VUUDU3 DJT; aircraft none -> JET ONLY, RNAV 1 - DME/DME/IRU OR GPS.; area none -> TO 06FA, BCT, F45, DJT, SUA","preferred IFR route ORD -> MHT: new routing ORD EBAKE WISMO POSTS PADDE SVM DKK PONCT ROZZE3 MHT; aircraft DME/DME/IRU OR GNSS REQUIRED -> JETS ONLY, RNAV 1 - DME/DME/IRU OR GPS; hours 1100-0300 -> none","preferred IFR route ORD -> MYR: new routing ORD EARND ELANR EMMLY ETAME EMEGE FLM SLOJO BRDWK1 MYR; aircraft none -> RNAV 1 - DME/DME/IRU OR GPS; area none -> TO CRE GGE MYR"]},{"id":"c7e593f9eefd","priority":"ifr","category":"chart","kind":"changed","summary":"departure OHARE NINE changed","source":"D-TPP","chart":{"code":"DP","name":"OHARE NINE","amdt":"","pdf":"https://aeronav.faa.gov/d-tpp/2611/00166OHARE.PDF"}},{"id":"ff0d574cb530","priority":"fyi","category":"frequency","kind":"added","summary":"frequencies now also listed for departures (DPs): 340.2 for OHARE","source":"FRQ","details":["added: 340.2 OHARE DP (EAST/NORTH)"]},{"id":"f338d80848bd","priority":"fyi","category":"frequency","kind":"removed","summary":"frequency 351.675 (OHARE DP): discontinued","source":"FRQ","fields":[{"field":"FACILITY","old":"C90","new":""},{"field":"FAC_NAME","old":"CHICAGO TRACON","new":""},{"field":"FACILITY_TYPE","old":"TRACON","new":""},{"field":"SERVICED_FACILITY","old":"ORD","new":""},{"field":"SERVICED_FAC_NAME","old":"CHICAGO O'HARE INTL","new":""},{"field":"SERVICED_SITE_TYPE","old":"AIRPORT","new":""},{"field":"SERVICED_CITY","old":"CHICAGO","new":""},{"field":"SERVICED_STATE","old":"IL","new":""},{"field":"SERVICED_COUNTRY","old":"US","new":""},{"field":"TOWER_OR_COMM_CALL","old":"O HARE","new":""},{"field":"PRIMARY_APPROACH_RADIO_CALL","old":"CHICAGO","new":""},{"field":"FREQ","old":"351.675","new":""},{"field":"SECTORIZATION","old":"EAST/NORTH","new":""},{"field":"FREQ_USE","old":"OHARE DP","new":""}]},{"id":"0f19e98feb21","priority":"fyi","category":"chart","kind":"changed","summary":"airport diagram changed","source":"D-TPP","chart":{"code":"APD","name":"AIRPORT DIAGRAM","amdt":"","pdf":"https://aeronav.faa.gov/d-tpp/2611/00166AD.PDF"}}]}