{"schema_version":1,"airport":"MA51","entries":[{"cycle":"2026-01-22","from_cycle":"2025-12-25","id":"5c629a25f839","priority":"fyi","category":"runway","kind":"changed","summary":"runway H1: runway end elevation: none -> 104 ft MSL","source":"APT_RWY_END","fields":[{"field":"RWY_END_ELEV","old":"","new":"104"}]}],"first_cycle":"2026-01-22","last_cycle":"2026-01-22"}