{"schema_version":1,"airport":"20MI","entries":[{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"3ee82ad63dbe","priority":"action","category":"frequency","kind":"added","summary":"frequency 122.9 (CTAF) added","source":"FRQ"},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"fd7670f3d492","priority":"action","category":"remark","kind":"changed","summary":"remark updated: FOR CD CTC SELFRIDGE APCH AT 586-239-5706, WHEN APCH CLSD CTC CLEVELAND ARTCC AT 440-774-0448/0490.","source":"APT_RMK","original":"FOR CD CTC SELFRIDGE APCH AT 586-239-5706, WHEN APCH CLSD CTC CLEVELAND ARTCC AT 440-774-0448/0490.","fields":[{"field":"REMARK","old":"FOR CD CTC CLEVELAND ARTCC AT 440-774-0490.","new":"FOR CD CTC SELFRIDGE APCH AT 586-239-5706, WHEN APCH CLSD CTC CLEVELAND ARTCC AT 440-774-0448/0490."}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"ed625db577c1","priority":"action","category":"remark","kind":"changed","summary":"remark updated: HELS MNTN 500 FT BLW 76G ARPT TFC PAT TIL CLEAR OF THE TPA LATERAL CFNS.","source":"APT_RMK","original":"HELS MNTN 500 FT BLW 76G ARPT TFC PAT TIL CLEAR OF THE TPA LATERAL CFNS.","fields":[{"field":"REMARK","old":"HELICOPTERS MAINTAIN 500 FT BLO MARINE CITY ARPT TFC PAT UNTIL CLEAR OF THE TPA LATERAL CONFINES.","new":"HELS MNTN 500 FT BLW 76G ARPT TFC PAT TIL CLEAR OF THE TPA LATERAL CFNS."}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"b03dc51baf5c","priority":"action","category":"remark","kind":"changed","summary":"remark updated: PRVDD ALL APCH/DEP RTES FM 090-270 DEGS CLKWS & MNTN 500 FT BLW 76G ARPT TFC PAT TIL CLEAR OF THE TPA; AREA IS MKD; WIND INDCR IS MNTND; COMPLIANCE WITH 14 CFR PART 91.126(B)(2).","source":"APT_RMK","original":"PRVDD ALL APCH/DEP RTES FM 090-270 DEGS CLKWS & MNTN 500 FT BLW 76G ARPT TFC PAT TIL CLEAR OF THE TPA; AREA IS MKD; WIND INDCR IS MNTND; COMPLIANCE WITH 14 CFR PART 91.126(B)(2).","fields":[{"field":"REMARK","old":"PRVDD ALL APP/DEP ROUTES FR 090 DEG CLOCKWISE TO 270 DEG AND MAINTAIN 500 FT BLO MARINE CITY ARPT TFC PAT UNTIL CLEAR OF THE TPA; AREA IS MARKED; WIND INDICATOR IS MAINTAINED; AND COMPLY WITH 14CFR 91.126(B)(2).","new":"PRVDD ALL APCH/DEP RTES FM 090-270 DEGS CLKWS & MNTN 500 FT BLW 76G ARPT TFC PAT TIL CLEAR OF THE TPA; AREA IS MKD; WIND INDCR IS MNTND; COMPLIANCE WITH 14 CFR PART 91.126(B)(2)."}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"5a6316903479","priority":"fyi","category":"airport","kind":"changed","summary":"airport contact address: 6455 STARVILLE ROAD -> 6455 STARVILLE RD; airport contact zip+4: none -> 1014","source":"APT_CON","fields":[{"field":"ADDRESS1","old":"6455 STARVILLE ROAD","new":"6455 STARVILLE RD"},{"field":"ZIP_PLUS_FOUR","old":"","new":"1014"}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"fb10b25e00fd","priority":"fyi","category":"airport","kind":"changed","summary":"direction from the city's business district: NE -> W; distance from the city's business district: 5 -> 4","source":"APT_BASE","fields":[{"field":"DIRECTION_CODE","old":"NE","new":"W"},{"field":"DIST_CITY_TO_AIRPORT","old":"5","new":"4"}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"4434b4d34174","priority":"fyi","category":"remark","kind":"changed","summary":"remark updated: 200 FT PLINE, 1056 FT NORTH OF HELIPAD & 20 FT POLE, 93 FT SOUTH OF HELIPAD.","source":"APT_RMK","original":"200 FT PLINE, 1056 FT NORTH OF HELIPAD & 20 FT POLE, 93 FT SOUTH OF HELIPAD.","fields":[{"field":"REMARK","old":"200 FT PLINE 1056 FT N OF HELIPAD AND 20 FT POLE 93 FT S OF HELIPAD.","new":"200 FT PLINE, 1056 FT NORTH OF HELIPAD & 20 FT POLE, 93 FT SOUTH OF HELIPAD."}]},{"cycle":"2025-08-07","from_cycle":"2025-07-10","id":"d75211dacdc8","priority":"fyi","category":"runway","kind":"changed","summary":"runway H1: runway end elevation: none -> 613 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"","new":"613"}]}],"first_cycle":"2025-08-07","last_cycle":"2025-08-07"}