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Captain of an mdt aborted takeoff after 1 of the propeller levers backed off from full forward position during takeoff roll.
| Attributes | |
| ACN | 288390 |
| Time | |
| Date | 199411 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : bos |
| State Reference | MA |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : cvg |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 14000 flight time type : 1500 |
| ASRS Report | 288390 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 300 flight time total : 11000 flight time type : 90 |
| ASRS Report | 288403 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Takeoff warning horn sounded on takeoff roll. Takeoff was aborted. It was noted that the #1 engine propeller lever had backed off the maximum (full forward) position, causing the takeoff warning horn to come on. This occurred well into the takeoff roll, but below V1, so obviously the propeller levers were at maximum when the power levers were advanced. There is a friction lock on the propeller levers, and it was in use. Either we did not have it tightened down enough or a propeller lever or propeller cable rigging problem caused the propeller lever to back off from 'maximum.' it normally takes very little friction to keep the levers held in position, so I suspect some kind of malfunction. A logbook maintenance write-up was entered in logbook. We are not required to write up 'nuisance warning horn activations,' but I felt that this was not a case of not setting in the correct flap setting, etc.
Original NASA ASRS Text
Title: CAPT OF AN MDT ABORTED TKOF AFTER 1 OF THE PROP LEVERS BACKED OFF FROM FULL FORWARD POS DURING TKOF ROLL.
Narrative: TKOF WARNING HORN SOUNDED ON TKOF ROLL. TKOF WAS ABORTED. IT WAS NOTED THAT THE #1 ENG PROP LEVER HAD BACKED OFF THE MAX (FULL FORWARD) POS, CAUSING THE TKOF WARNING HORN TO COME ON. THIS OCCURRED WELL INTO THE TKOF ROLL, BUT BELOW V1, SO OBVIOUSLY THE PROP LEVERS WERE AT MAX WHEN THE PWR LEVERS WERE ADVANCED. THERE IS A FRICTION LOCK ON THE PROP LEVERS, AND IT WAS IN USE. EITHER WE DID NOT HAVE IT TIGHTENED DOWN ENOUGH OR A PROP LEVER OR PROP CABLE RIGGING PROB CAUSED THE PROP LEVER TO BACK OFF FROM 'MAX.' IT NORMALLY TAKES VERY LITTLE FRICTION TO KEEP THE LEVERS HELD IN POS, SO I SUSPECT SOME KIND OF MALFUNCTION. A LOGBOOK MAINT WRITE-UP WAS ENTERED IN LOGBOOK. WE ARE NOT REQUIRED TO WRITE UP 'NUISANCE WARNING HORN ACTIVATIONS,' BUT I FELT THAT THIS WAS NOT A CASE OF NOT SETTING IN THE CORRECT FLAP SETTING, ETC.
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.