29 Jul 2024 Helena, Montana; Helena Regl (KHLN) – RNAV (RNP) Y Rwy 27 Incorrect RNP at MUSEW Notices & Alerts / Helena, Montana; Helena Regl (KHLN) – RNAV (RNP) Y Rwy 27 Included Regions (1) United States Included Areas (1) MT Jeppesen NavData for cycle 2408, effective 08 August 2024, contains an incorrect RNP at MUSEW on the missed approach. The RNP at MUSEW should be 0.78. KHLN_2408_NavData_Alert Back to All Notices & Alerts