# NTSB LAX08CA119: Carlson Quickie Q2, N39425, Casper, WY, April 19, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: April 19, 2008, 08:30 local (14:30 UTC) - Place: Casper, WY - Coordinates: 42.907775, -106.464164 - Nearby events: https://openairdocs.org/map.md?lat=42.9078&lon=-106.4642&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 30, 2008 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 67856 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX08CA119 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/67856/pdf - Page: https://openairdocs.org/ntsb/LAX08CA119 ## Probable cause A loss of directional control on landing due to the separation of the wing leveler trim knob and resulting reduced aileron control. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Flight control system: aileron tab control system](https://openairdocs.org/ntsb-findings/01022711): Aircraft › Aircraft systems · Damaged/degraded (probable cause); cases with it: [Carlson David QUICKIE Q2, 1 case](https://openairdocs.org/ntsb-findings/01022711/cases.md?model=05645PZ), [All aircraft, 2 cases](https://openairdocs.org/ntsb-findings/01022711/cases.md) - [Flight control system: aileron control system](https://openairdocs.org/ntsb-findings/01022710): Aircraft › Aircraft systems · Not specified (probable cause); cases with it: [Carlson David QUICKIE Q2, 1 case](https://openairdocs.org/ntsb-findings/01022710/cases.md?model=05645PZ), [All aircraft, 45 cases](https://openairdocs.org/ntsb-findings/01022710/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Attain/maintain not possible (probable cause); cases with it: [Carlson David QUICKIE Q2, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=05645PZ), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Carlson David QUICKIE Q2, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05645PZ), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-flare/touchdown: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Carlson David QUICKIE Q2, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05645PZ), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis While en route on a cross-country flight, the pilot attempted to adjust the roll trim of the airplane and manipulated the wing leveler knob, but the knob fell off. While struggling to replace the knob and tighten the securing hardware, the airplane ended up with a left wing-down trim that he was unable to correct. While attempting to land at the destination airport, he had to input full right-stick deflection and left rudder to maintain straight flight. He made a low approach and opted to go-around. On the second landing attempt, the airplane touched down hard and bounced, then continued off the left side of the runway. The airplane incurred substantial damage to the canard during the runway excursion. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident, with the exception of the improperly safetied wing leveler trim knob. Due to the significant left wing down trim, and the need to cross-control the airplane, the pilot was unable to maintain directional control with the reduced control authority available. ## Factual narrative The pilot submitted a written statement and partook in numerous conversations with the Federal Aviation Administration (FAA) inspector. The pilot reported that while en route on a cross-country flight, he attempted to stabilize the airplane via the trim in an effort to compensate for his weight [on the left side of the airplane]. He manipulated the wing leveler knob and it subsequently fell off. While struggling to replace the knob and tighten it to the attach point, the pilot turned it left. In response, the airplane became configured with a left wing-down tendency that he was unable to correct. The pilot further stated that while attempting to land at the destination airport, he had to input full right-stick deflection and left rudder to maintain straight flight. He made a low approach and opted to perform a go-around. On the pilot's second landing attempt, the airplane touched down hard and bounced, continuing off the left side of the runway. The airplane incurred substantial damage to the canard during the accident sequence. The pilot had amassed 1.5 hours in the same make and model as the accident airplane. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident, with the exception of the improperly safetied knob. ## Aircraft - Registration: [N39425](https://openairdocs.org/aircraft/N39425), registered now, S/N 2236, built 1983 (OpenAirDocs) - Reported make and model: Carlson Quickie Q2 - Registry model: [Carlson David QUICKIE Q2](https://openairdocs.org/model/carlson-david-quickie-q2) (registry code 05645PZ) (OpenAirDocs) - Registry engine: [Revmaster 2100](https://openairdocs.org/engine/revmaster-2100) (registry code 52550, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 2236 - Engines: Revmaster 2100 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Departed: VEL, Vernal, UT - Destination: CPR, Casper, WY - Airport: CPR, Natrona County International, runway 21, 10,165 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 42; private; airplane ratings: single-engine land; medical: class 2; flight hours: 282 total, 2 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 16 knots, gusting 22 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 54 °F, dew point 19 °F - Altimeter: 29.79 inHg - Observed at: CPR From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.