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20050425007359I

Incident · Minor damage
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FAA incident report · Amtr LANCAIR ES · Minden, NV · April 25, 2005

FAA Aviation Safety Information Portal

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Date
April 25, 2005 · 15:30 local
Place
Minden, NV
Airport
Douglas County Airport
Phase of flight
Roll-Out (Fixed Wing)
Operating rules
General operating rules (Part 91)
Damage
Minor damage
Aircraft
N1169G
Reported as
Amtr Lancaires
Reported engine
Continental TSIO360*
People aboard
1
Fatal injuries
0
Pilot’s flight hours
1,720 total34 in this make and model40 in the last 90 days
N1169GRegistered now · Sorensen Gary E LANCAIR ESS/N ES-063-FB · Built 2000Airframe modelSorensen Gary E LANCAIR ESEngine modelAmateur-built UNKNOWN ENG

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23) The engine mount is the structure to which the nose gear strut attaches. The nose gear strut has an internal shimmy dampening system. During landing, the aircraft experienced a severe nose wheel shimmy. The shimmy occurred at about 45 knots and continued until the aircraft decelerated through 20 knots. The nose gear strut was inspected and fluid was found leaking from a loose screw. The screw was tightened and the strut was serviced with MIL-H-5606 and nitrogen. On the next flight, a nose wheel shimmy was again encountered during landing. A post flight inspection revealed the engine mount/nose strut attachment structure was broken in six places. (-23 amendment) on 06/01/05, the aircraft was operated after repair. During landing a severe shimmy was encountered. Post flight inspection revealed the nose gear strut shaft was too hot to touch. Additionally, the fork oil in the nose gear strut has changed from amber in color to black and the strut was leaking fluid. An operation check of the shimmy damper revealed the system was not functioning properly allowing the nose gear to caster without resistance.

As the FAA filed it

(-23) THE ENGINE MOUNT IS THE STRUCTURE TO WHICH THE NOSE GEAR STRUT ATTACHES. THE NOSE GEAR STRUT HAS AN INTERNAL SHIMMY DAMPENING SYSTEM. DURING LANDING, THE AIRCRAFT EXPERIENCED A SEVERE NOSE WHEEL SHIMMY. THE SHIMMY OCCURRED AT ABOUT 45 KNOTS AND CONTINUED UNTIL THE AIRCRAFT DECELERATED THROUGH 20 KNOTS. THE NOSE GEAR STRUT WAS INSPECTED AND FLUID WAS FOUND LEAKING FROM A LOOSE SCREW. THE SCREW WAS TIGHTENED AND THE STRUT WAS SERVICED WITH MIL-H-5606 AND NITROGEN. ON THE NEXT FLIGHT, A NOSE WHEEL SHIMMY WAS AGAIN ENCOUNTERED DURING LANDING. A POST FLIGHT INSPECTION REVEALED THE ENGINE MOUNT/NOSE STRUT ATTACHMENT STRUCTURE WAS BROKEN IN SIX PLACES. (-23 AMENDMENT) ON 06/01/05, THE AIRCRAFT WAS OPERATED AFTER REPAIR. DURING LANDING A SEVERE SHIMMY WAS ENCOUNTERED. POST FLIGHT INSPECTION REVEALED THE NOSE GEAR STRUT SHAFT WAS TOO HOT TO TOUCH. ADDITIONALLY, THE FORK OIL IN THE NOSE GEAR STRUT HAS CHANGED FROM AMBER IN COLOR TO BLACK AND THE STRUT WAS LEAKING FLUID. AN OPERATION CHECK OF THE SHIMMY DAMPER REVEALED THE SYSTEM WAS NOT FUNCTIONING PROPERLY ALLOWING THE NOSE GEAR TO CASTER WITHOUT RESISTANCE.