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Aileron would trim only left wing down. Aircraft becoming out of trim. Landed bwi nearest suitable for maintenance.
| Attributes | |
| ACN | 196956 |
| Time | |
| Date | 199112 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bwi |
| State Reference | MD |
| Altitude | agl bound lower : 0 agl bound upper : 0 msl bound lower : 14000 msl bound upper : 14000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, High Wing, 2 Turboprop Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 8000 flight time type : 240 |
| ASRS Report | 196956 |
| 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:
As the first officer tried to trim the right wing down using the aileron trim he noted that the switch would not 'toggle' right, only left. I called company and they advised a diversion to baltimore for maintenance, since our destination at white plains has no company maintenance. A 'peanut' light bulb (approximately 1/4 inch long) had become stuck underneath the switch cover.
Original NASA ASRS Text
Title: AILERON WOULD TRIM ONLY L WING DOWN. ACFT BECOMING OUT OF TRIM. LANDED BWI NEAREST SUITABLE FOR MAINT.
Narrative: AS THE FO TRIED TO TRIM THE R WING DOWN USING THE AILERON TRIM HE NOTED THAT THE SWITCH WOULD NOT 'TOGGLE' R, ONLY L. I CALLED COMPANY AND THEY ADVISED A DIVERSION TO BALTIMORE FOR MAINT, SINCE OUR DEST AT WHITE PLAINS HAS NO COMPANY MAINT. A 'PEANUT' LIGHT BULB (APPROX 1/4 INCH LONG) HAD BECOME STUCK UNDERNEATH THE SWITCH COVER.
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.