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HS125-800 crew had a GPWS low altitude warning and an MSAW warning on localizer (back course) runway 3R at luk.
| Attributes | |
| ACN | 630545 |
| Time | |
| Date | 200409 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : luk.airport |
| State Reference | OH |
| Altitude | msl bound lower : 1900 msl bound upper : 2100 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | BAe 125 Series 800 |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | ils localizer only : 3r other |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : multi engine pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 149 flight time total : 20094 flight time type : 973 |
| ASRS Report | 630545 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : far non adherence : published procedure other spatial deviation |
| Independent Detector | atc equipment : msaw atc equipment other atc equipment : radar aircraft equipment : gpws other flight crewa other flight crewb |
| Resolutory Action | controller : issued alert controller : issued new clearance flight crew : executed go around |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On cincinnati's lunken localizer (back course) runway 3R approach, we had an intermittent r-hand navigation receive signal, or so indicated by our FMS information.for that reason, the autoplt localizer back course selector would not arm. Therefore,the senior captain/PF used the left FMS for approach while I selected raw data localizer back course on the right side, which appeared normal. In this busy atmosphere, we inadvertently descended below 2100 ft to approximately 1900 ft just prior to defts fap fix. We did not like what we saw with l-hand navigation on FMS and r-hand navigation on raw data and both of us announced 'go around' to sort it out. At that moment the GPWS advised low altitude and a moment later the tower controller advised low altitude, to which we were now announcing our go around. We both selected raw data for a subsequent approach, successfully completed it, and wrote up the #2 navigation receiver for maintenance. CRM worked!
Original NASA ASRS Text
Title: HS125-800 CREW HAD A GPWS LOW ALT WARNING AND AN MSAW WARNING ON LOC (BACK COURSE) RWY 3R AT LUK.
Narrative: ON CINCINNATI'S LUNKEN LOC (BACK COURSE) RWY 3R APCH, WE HAD AN INTERMITTENT R-HAND NAV RECEIVE SIGNAL, OR SO INDICATED BY OUR FMS INFO.FOR THAT REASON, THE AUTOPLT LOC BACK COURSE SELECTOR WOULD NOT ARM. THEREFORE,THE SENIOR CAPT/PF USED THE L FMS FOR APCH WHILE I SELECTED RAW DATA LOC BACK COURSE ON THE R SIDE, WHICH APPEARED NORMAL. IN THIS BUSY ATMOSPHERE, WE INADVERTENTLY DSNDED BELOW 2100 FT TO APPROX 1900 FT JUST PRIOR TO DEFTS FAP FIX. WE DID NOT LIKE WHAT WE SAW WITH L-HAND NAV ON FMS AND R-HAND NAV ON RAW DATA AND BOTH OF US ANNOUNCED 'GO AROUND' TO SORT IT OUT. AT THAT MOMENT THE GPWS ADVISED LOW ALT AND A MOMENT LATER THE TWR CTLR ADVISED LOW ALT, TO WHICH WE WERE NOW ANNOUNCING OUR GAR. WE BOTH SELECTED RAW DATA FOR A SUBSEQUENT APCH, SUCCESSFULLY COMPLETED IT, AND WROTE UP THE #2 NAV RECEIVER FOR MAINT. CRM WORKED!
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.