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Pilot of MU2 encounters a failure of fuel xfer from the tip tanks to the mains thus rendering the tip fuel unusable. Declares emergency and lands at bna.
| Attributes | |
| ACN | 600295 |
| Time | |
| Date | 200311 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : bna.vortac |
| State Reference | TN |
| Altitude | msl single value : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : bna.tracon |
| Operator | general aviation : corporate |
| Make Model Name | MU-2 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other vortac |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : multi engine pilot : instrument |
| Experience | flight time last 90 days : 112 flight time total : 7797 flight time type : 1171 |
| ASRS Report | 600295 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : declared emergency flight crew : diverted to another airport |
| Consequence | other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Observed improper xfer of fuel from tip tanks into main fuel tank that supplies each engine. This required my total usable fuel supply available. Explained situation to bna approach control and requested a priority landing. Bna responded with a visual clearance to land runway 13. Approach control switched me over to tower and cleared me to land. Bna approach asked me if I wanted emergency equipment standing by. I responded 'yes.' the landing was uneventful. Maintenance discovered a worn gasket on the right fuel tank filler cap, causing it not to pressurize causing an imbal between the left and right fuel tip tanks, thus shutting off fuel xfer from the tips to the main tank.
Original NASA ASRS Text
Title: PLT OF MU2 ENCOUNTERS A FAILURE OF FUEL XFER FROM THE TIP TANKS TO THE MAINS THUS RENDERING THE TIP FUEL UNUSABLE. DECLARES EMER AND LANDS AT BNA.
Narrative: OBSERVED IMPROPER XFER OF FUEL FROM TIP TANKS INTO MAIN FUEL TANK THAT SUPPLIES EACH ENG. THIS REQUIRED MY TOTAL USABLE FUEL SUPPLY AVAILABLE. EXPLAINED SIT TO BNA APCH CTL AND REQUESTED A PRIORITY LNDG. BNA RESPONDED WITH A VISUAL CLRNC TO LAND RWY 13. APCH CTL SWITCHED ME OVER TO TWR AND CLRED ME TO LAND. BNA APCH ASKED ME IF I WANTED EMER EQUIP STANDING BY. I RESPONDED 'YES.' THE LNDG WAS UNEVENTFUL. MAINT DISCOVERED A WORN GASKET ON THE R FUEL TANK FILLER CAP, CAUSING IT NOT TO PRESSURIZE CAUSING AN IMBAL BTWN THE L AND R FUEL TIP TANKS, THUS SHUTTING OFF FUEL XFER FROM THE TIPS TO THE MAIN TANK.
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.