{"schema_version":1,"airport":"Y31","entries":[{"cycle":"2026-09-03","from_cycle":"2026-08-06","id":"03de16144d3c","priority":"fyi","category":"frequency","kind":"removed","summary":"flight service (FSS) 122.3 via the West Branch outlet no longer available","source":"FRQ"},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"61b26253ea6d","priority":"fyi","category":"runway","kind":"changed","summary":"runway 09: controlling obstacle changed (now , clearance slope 34:1); controlling obstacle: TREES -> none","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"R","new":""},{"field":"CNTRLN_OFFSET","old":"219","new":""},{"field":"DIST_FROM_THR","old":"332","new":""},{"field":"OBSTN_CLNC_SLOPE","old":"22","new":"34"},{"field":"OBSTN_HGT","old":"6","new":""},{"field":"OBSTN_TYPE","old":"TREES","new":""}]},{"cycle":"2025-12-25","from_cycle":"2025-11-27","id":"6a7718548b66","priority":"fyi","category":"runway","kind":"changed","summary":"runway 27: controlling obstacle changed (now 70 ft tall, 2379 ft from threshold, 592 ft right of centerline, clearance slope 31:1); controlling obstacle: BRUSH -> TREE","source":"APT_RWY_END","fields":[{"field":"CNTRLN_DIR_CODE","old":"L","new":"R"},{"field":"CNTRLN_OFFSET","old":"240","new":"592"},{"field":"DIST_FROM_THR","old":"200","new":"2379"},{"field":"OBSTN_CLNC_SLOPE","old":"1","new":"31"},{"field":"OBSTN_HGT","old":"6","new":"70"},{"field":"OBSTN_TYPE","old":"BRUSH","new":"TREE"}]},{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"0dd4c44509fd","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF. PAPI RWY 09 & 27 OPR CONSLY SR-SS.","source":"APT_RMK","original":"ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF. PAPI RWY 09 & 27 OPR CONSLY SR-SS.","fields":[{"field":"REMARK","old":"ACTVT REIL RWYS 09 & 27; PAPI RWYS 09 & 27; MIRL RWY 09/27 - CTAF.","new":"ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF. PAPI RWY 09 & 27 OPR CONSLY SR-SS."}]},{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"ad43755928dc","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: ADMIN BLDG ACES: 5-3-2-1-#.","source":"APT_RMK","original":"ADMIN BLDG ACES: 5-3-2-1-#.","fields":[{"field":"REMARK","old":"ADMIN BLDG ACCESS, 5-3-2-1-#.","new":"ADMIN BLDG ACES: 5-3-2-1-#."}]},{"cycle":"2025-10-30","from_cycle":"2025-10-02","id":"10602bbc46f2","priority":"fyi","category":"frequency","kind":"changed","summary":"remark: ACTVT REIL RWYS 09 & 27; PAPI RWYS 09 & 27; MIRL RWY 09/27 - CTAF. -> ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF. PAPI RWY 09 & 27 OPR CONSLY SR-SS.","source":"FRQ","fields":[{"field":"REMARK","old":"ACTVT REIL RWYS 09 & 27; PAPI RWYS 09 & 27; MIRL RWY 09/27 - CTAF.","new":"ACTVT REIL RWY 09 & 27; PAPI RWY 09 & 27; MIRL RWY 09/27 - CTAF. PAPI RWY 09 & 27 OPR CONSLY SR-SS."}]},{"cycle":"2025-05-15","from_cycle":"2025-04-17","id":"bbe7d3fed7e5","priority":"fyi","category":"airport","kind":"changed","summary":"NOTAM facility: LAN -> Y31","source":"APT_BASE","fields":[{"field":"NOTAM_ID","old":"LAN","new":"Y31"}]}],"first_cycle":"2025-05-15","last_cycle":"2026-09-03"}