# NTSB FTW97LA237: Rans S-12 Airaile S-12, N2117X, Fort Collins, CO, June 27, 1997 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: June 26, 1997, 18:45 local (Jun 27, 1997, 00:45 UTC) - Place: Fort Collins, CO - Coordinates: 40.549991, -105.059066 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.5500&lon=-105.0591&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report February 2, 1998 - Report: Approved by Office Director - NTSB case key (mKey): 20255 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW97LA237 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/20255/pdf - Page: https://openairdocs.org/ntsb/FTW97LA237 ## Probable cause Attempt by the pilot to fly the aircraft with the center of gravity out of limits. A factor was a disconnected lift strut support cable. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - initial climb - wing,bracing wire - disconnected (contributing factor) - aircraft weight and balance - exceeded, pilot in command (cause) - In flight collision with terrain/water, descent - uncontrolled - stall - encountered, pilot in command ## Analysis Following takeoff on his first solo flight in the aircraft, the nose of the aircraft continued to rise and the pilot could not lower the nose with full nose down elevator application. In addition, according to the pilot, the aircraft was right wing heavy. The owner of the aircraft could not provide specific performance or weight and balance information, but stated the center of gravity tended to be 'somewhat' forward with lighter weight in the cockpit. The owner was approximately 30 to 40 pounds heavier than the pilot. In addition, following the accident, examination provided evidence that the right lift strut support cable was not connected at the upper fitting and exhibited no evidence of impact damage. ## Factual narrative On June 26, 1997, at 1845 mountain daylight time, a RANS S-12 Airaile ultralight, N2117X, collided with the ground in an uncontrolled descent following initial climb during takeoff. The private pilot received serious injuries and the aircraft sustained substantial damage. Visual meteorological conditions prevailed for this local flight which originated approximately one minute prior to the accident. No flight plan was filed. According to the owner, this was the pilot's first solo flight in this aircraft and according to the pilot he had spent approximately 6 hours of dual flying with the owner. According to the pilot, his engine run up was normal and he became airborne at 30 to 40 miles per hour (mph). He said it is normal for this aircraft to climb steeply but he was unable to get the nose down following takeoff even though he applied full nose down elevator. Also, according to his account, the aircraft pulled to the right and as the speed decreased the right pulling tendency increased in magnitude. The pilot stated the aircraft pitched to a vertical nose down attitude somewhere between 50 and 100 feet above the ground and descended to a vertical impact. He also said he is 30 to 40 pounds lighter than the person who normally flies this aircraft solo. Following the accident, examination of the aircraft by this investigator provided evidence that the right lift strut support cable was detached at the upper fitting. The pin was present and the pin mounting showed no evidence of damage or distortion. Examination also provided evidence that control continuity was present and that the elevator trim was found in the neutral position. The fuselage was crushed up and back and both wings exhibited upward deformation with crushing in a upward direction toward the tip. A witness, who is a certified flight instructor, provided information that following takeoff, the nose of the aircraft continued to rise and it appeared to him like the aircraft stalled and rolled right after the stall. He said the nose went down to the vertical and the aircraft remained in that attitude until impact. He also said the elevator appeared to be deflected to the full nose down position prior to the stall. The owner of the aircraft could not provide specific performance or weight and balance information but stated the center of gravity tended to be "somewhat" forward with lighter weight in the cockpit. ## Aircraft - Registration: [N2117X](https://openairdocs.org/deregistered/N2117X-1997-10-21), registration cancelled 1997-10-21, S/N 1194530 (OpenAirDocs) - Reported make and model: Rans S-12 Airaile S-12 - Registry model: [Mclaughlin George G RANS S-12 AIRAILE](https://openairdocs.org/model/mclaughlin-george-g-rans-s-12-airaile) (registry code 05628EU) (OpenAirDocs) - Category: Ultralight, amateur-built - Serial number: 1194530 - Airframe hours: 68 - Engines: Rotax 58Z 65 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: George Mclaughlin - Airworthiness certificate: Special, Experimental (Special) - Last inspection: AAIP, October 21, 1996, 18 hours before - Departed: 3V5 - Airport: 3V5, Fort Collins Downtown, runway 11, 4,699 × 48 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: right; flight hours: 633 total, 6 in this make and model, 633 as pilot in command, 6 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 290° at 3 knots - Visibility: 30 statute miles - Lowest ceiling: none - Temperature: 90 °F ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19970627016089A](https://openairdocs.org/incident/19970627016089A), Jun 27, 1997: Amtr RANSS12, Ft Collins, CO, No damage. Ultralight handglider crashed at FAR end of runway. 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.