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M-20P pilot had severe nosewheel shimmy on landing. The pilot then left the next day without taking maintenance action to fix the shimmy. The aircraft sustained damage on the next landing.
| Attributes | |
| ACN | 574807 |
| Time | |
| Date | 200302 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : hys.airport |
| State Reference | KS |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | M-20 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | landing : roll |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : atp pilot : commercial pilot : multi engine |
| Experience | flight time last 90 days : 180 flight time total : 13000 flight time type : 96 |
| ASRS Report | 574807 |
| Person 2 | |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : repair performance deficiency : inspection performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
During rollout after a normal touchdown at approximately 40 KIAS, the nosewheel shimmied. Pulling full nose up elevator did not stop the shimmy, so I applied the brakes and slowed to a speed at which the shimmy ceased. The takeoff and initial climb were normal. Upon attempting to retract the landing gear, the handle would not move to the full retract position. After several attempts to retract the gear, I decided to extend the gear and return for landing. The gear extended normally with a green light indicating extension. I had normal gear indications for down and locked. Touchdown on runway 16 was normal, but when the nosewheel touched down, the airplane veered to the left. I attempted to correct and there was a loud bang, followed by severe nosewheel shimmy that lasted only a few seconds. Limited rudder steering authority/authorized returned and I taxied to the ramp. Maintenance coordinator called me and we discussed the landing gear damage. In retrospect, I wish I would have asked the mechanic to inspect the shimmy problem after the first landing. A second, trained pair of eyes would have been reassuring and may have saved me from this occurrence, and further expense.
Original NASA ASRS Text
Title: M-20P PLT HAD SEVERE NOSEWHEEL SHIMMY ON LNDG. THE PLT THEN LEFT THE NEXT DAY WITHOUT TAKING MAINT ACTION TO FIX THE SHIMMY. THE ACFT SUSTAINED DAMAGE ON THE NEXT LNDG.
Narrative: DURING ROLLOUT AFTER A NORMAL TOUCHDOWN AT APPROX 40 KIAS, THE NOSEWHEEL SHIMMIED. PULLING FULL NOSE UP ELEVATOR DID NOT STOP THE SHIMMY, SO I APPLIED THE BRAKES AND SLOWED TO A SPD AT WHICH THE SHIMMY CEASED. THE TKOF AND INITIAL CLB WERE NORMAL. UPON ATTEMPTING TO RETRACT THE LNDG GEAR, THE HANDLE WOULD NOT MOVE TO THE FULL RETRACT POS. AFTER SEVERAL ATTEMPTS TO RETRACT THE GEAR, I DECIDED TO EXTEND THE GEAR AND RETURN FOR LNDG. THE GEAR EXTENDED NORMALLY WITH A GREEN LIGHT INDICATING EXTENSION. I HAD NORMAL GEAR INDICATIONS FOR DOWN AND LOCKED. TOUCHDOWN ON RWY 16 WAS NORMAL, BUT WHEN THE NOSEWHEEL TOUCHED DOWN, THE AIRPLANE VEERED TO THE L. I ATTEMPTED TO CORRECT AND THERE WAS A LOUD BANG, FOLLOWED BY SEVERE NOSEWHEEL SHIMMY THAT LASTED ONLY A FEW SECONDS. LIMITED RUDDER STEERING AUTH RETURNED AND I TAXIED TO THE RAMP. MAINT COORDINATOR CALLED ME AND WE DISCUSSED THE LNDG GEAR DAMAGE. IN RETROSPECT, I WISH I WOULD HAVE ASKED THE MECH TO INSPECT THE SHIMMY PROB AFTER THE FIRST LNDG. A SECOND, TRAINED PAIR OF EYES WOULD HAVE BEEN REASSURING AND MAY HAVE SAVED ME FROM THIS OCCURRENCE, AND FURTHER EXPENSE.
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.