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Medium large transport has warning horn sound when throttles advanced. Abort takeoff. Unable duplicate, takeoff.
| Attributes | |
| ACN | 210012 |
| Time | |
| Date | 199205 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : las |
| State Reference | NV |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : takeoff other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 12000 flight time type : 2200 |
| ASRS Report | 210012 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : instrument pilot : commercial |
| Experience | flight time last 90 days : 150 flight time total : 6000 flight time type : 1500 |
| ASRS Report | 210757 |
| Events | |
| Anomaly | aircraft equipment problem : less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Takeoff warning horn sounded when throttles were advanced for takeoff. Pulled off runway and checked all takeoff warning items in proper position. Advanced each throttle again, but takeoff warning did not sound again. Made a normal takeoff. Maintenance cleared logbook entry by servicing nose strut. Apparently, improper strut inflation can affect air/ground switch and give false takeoff warning even when every pilot controled item is properly positioned. I suggested this information be included in the pilot's handbook.
Original NASA ASRS Text
Title: MLG HAS WARNING HORN SOUND WHEN THROTTLES ADVANCED. ABORT TKOF. UNABLE DUPLICATE, TKOF.
Narrative: TKOF WARNING HORN SOUNDED WHEN THROTTLES WERE ADVANCED FOR TKOF. PULLED OFF RWY AND CHKED ALL TKOF WARNING ITEMS IN PROPER POS. ADVANCED EACH THROTTLE AGAIN, BUT TKOF WARNING DID NOT SOUND AGAIN. MADE A NORMAL TKOF. MAINT CLRED LOGBOOK ENTRY BY SVCING NOSE STRUT. APPARENTLY, IMPROPER STRUT INFLATION CAN AFFECT AIR/GND SWITCH AND GIVE FALSE TKOF WARNING EVEN WHEN EVERY PLT CTLED ITEM IS PROPERLY POSITIONED. I SUGGESTED THIS INFO BE INCLUDED IN THE PLT'S HANDBOOK.
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.