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An embraer 120 on taxi out a check of the #1 engine propeller revealed the failure of the propeller to feather caused by the engine fuel control unit.
| Attributes | |
| ACN | 405696 |
| Time | |
| Date | 199806 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mco |
| State Reference | FL |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other |
| Flight Phase | ground : preflight |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 6700 flight time type : 1000 |
| ASRS Report | 405696 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
While preparing feather test on #1 engine, propeller did not feather -- fuel flow was increasing and torque was increasing. Returned to gate. The embraer brasilia has a history of propeller problems. Callback conversation with reporter revealed the following information: the reporter stated the hydromechanical metering unit or fuel control unit was replaced to correct the propeller feathering failure. The reporter said a power lever angle potentiometer had failed in the unit. The reporter stated the propeller system has been a problem with everything from throwing a blade, over-speeding and gear spline disconnecting in the feathering mechanism.
Original NASA ASRS Text
Title: AN EMBRAER 120 ON TAXI OUT A CHK OF THE #1 ENG PROP REVEALED THE FAILURE OF THE PROP TO FEATHER CAUSED BY THE ENG FUEL CTL UNIT.
Narrative: WHILE PREPARING FEATHER TEST ON #1 ENG, PROP DID NOT FEATHER -- FUEL FLOW WAS INCREASING AND TORQUE WAS INCREASING. RETURNED TO GATE. THE EMBRAER BRASILIA HAS A HISTORY OF PROP PROBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE HYDROMECHANICAL METERING UNIT OR FUEL CTL UNIT WAS REPLACED TO CORRECT THE PROP FEATHERING FAILURE. THE RPTR SAID A PWR LEVER ANGLE POTENTIOMETER HAD FAILED IN THE UNIT. THE RPTR STATED THE PROP SYS HAS BEEN A PROB WITH EVERYTHING FROM THROWING A BLADE, OVER-SPDING AND GEAR SPLINE DISCONNECTING IN THE FEATHERING MECHANISM.
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.