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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An MD80 in a climb to 16000 ft felt a 'clunk' in the elevator yoke during pitch change; which was rptedly caused by a malfunctioning elevator load feel and centering spring unit.
| Attributes | |
| ACN | 679488 |
| Time | |
| Date | 200511 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pdx.airport |
| State Reference | OR |
| Altitude | msl single value : 16000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 210 flight time type : 1608 |
| ASRS Report | 679488 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 100 flight time type : 5400 |
| ASRS Report | 679499 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport flight crew : overcame equipment problem |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Chart Or Publication Environmental Factor Aircraft |
| Primary Problem | Aircraft |
Narrative:
During climb out from sea; I noticed a 'clunk' feeling in the yoke while adjusting pressure and accelerating to normal climb speed. Other than the 'clunk;' the flight controls operated normally. We contacted maintenance control and dispatch. By this time; we were abeam pdx and decided to divert to pdx. A normal descent and overweight/normal landing were made. Callback conversation with reporter revealed the following information: the reporter stated the 'clunk' feeling in the yoke was solid and was strongly felt. After the 'clunk;' the elevator controls performed normally. The reporter indicated that maintenance replaced the feel and centering spring unit.
Original NASA ASRS Text
Title: AN MD80 IN A CLB TO 16000 FT FELT A 'CLUNK' IN THE ELEVATOR YOKE DURING PITCH CHANGE; WHICH WAS RPTEDLY CAUSED BY A MALFUNCTIONING ELEVATOR LOAD FEEL AND CENTERING SPRING UNIT.
Narrative: DURING CLBOUT FROM SEA; I NOTICED A 'CLUNK' FEELING IN THE YOKE WHILE ADJUSTING PRESSURE AND ACCELERATING TO NORMAL CLB SPD. OTHER THAN THE 'CLUNK;' THE FLT CTLS OPERATED NORMALLY. WE CONTACTED MAINT CTL AND DISPATCH. BY THIS TIME; WE WERE ABEAM PDX AND DECIDED TO DIVERT TO PDX. A NORMAL DSCNT AND OVERWT/NORMAL LNDG WERE MADE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE 'CLUNK' FEELING IN THE YOKE WAS SOLID AND WAS STRONGLY FELT. AFTER THE 'CLUNK;' THE ELEVATOR CTLS PERFORMED NORMALLY. THE RPTR INDICATED THAT MAINT REPLACED THE FEEL AND CENTERING SPRING UNIT.
Data retrieved from NASA's ASRS site as of January 2009 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.