# NTSB CHI99LA250: Cessna 150L, N6726G, Udall, KS, July 23, 1999 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: July 23, 1999, 17:30 local (22:30 UTC) - Place: Udall, KS - Coordinates: 37.380069, -97.110321 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.3801&lon=-97.1103&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report September 12, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 46894 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI99LA250 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46894/pdf - Page: https://openairdocs.org/ntsb/CHI99LA250 ## Probable cause the failure of maintenance personnel to properly safety the aileron control cable during installation, the disconnected aileron control cable, and the unavailability of aileron control to the pilot. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - flt control syst,aileron control cable/rod - not safetied (cause) - maintenance,installation - improper, other maintenance personnel (cause) - flt control syst,aileron control cable/rod - disconnected (cause) - aileron - unavailable, pilot in command (cause) - In flight collision with terrain/water, emergency landing after takeoff ## Analysis Aileron control was lost on takeoff. The airplane impacted terrain during the subsequent landing. The pilot said 'all [of the aircraft] controls felt normal at the start of the takeoff roll.' The pilot stated 'after lift off the ailerons would not respond to control input.' The pilot stated that he then reduced power to idle and applied left rudder in an attempt to maintain a level attitude. The pilot stated that he was unable to keep the wings level and the aircraft rolled slowly to the right and the right wing contacted the ground. The pilot stated that 'the right wing always seemed heavy on this airplane.' A post accident examination of the aircraft was performed. The clevis bolt for the left aileron cable was not in place. No safety pin was located. There was scarring of the painted surface of the tubing forward of the clevis bolt location. No other anomalies were detected. The aileron cable had been replaced 14.5 operational hours prior to the accident flight. ## Factual narrative On July 23, 1999, approximately 1730 central daylight time, a Cessna 150L, N6726G, piloted by a private pilot, sustained substantial damage when it impacted terrain, following a loss of aileron control after takeoff from the Cherokee Strip Airport near Udall, Kansas. The flight was conducted under the provisions of 14 CFR Part 91 and no flight plan had been filed. The pilot received minor injuries and his passenger received no injuries. The flight was originating from the Cherokee Strip Airport and was en route to Cook Airfield, Derby, Kansas. In a written statement, the pilot said "all [of the aircraft] controls felt normal at the start of the takeoff roll." The pilot stated "after lift off the ailerons would not respond to control input." The pilot stated that he then reduced power to idle and applied left rudder in an attempt to maintain a level attitude. The pilot stated that he was unable to keep the wings level and the aircraft rolled slowly to the right and the right wing contacted the ground. The pilot stated that "the right wing always seemed heavy on this airplane." A post accident examination of the aircraft was performed. The clevis bolt for the left aileron cable was not in place. No safety pin was located. There was scarring of the painted surface of the tubing forward of the clevis bolt location. No other anomalies were detected. According to a Federal Aviation Administration inspector, the aileron cable had been replaced 14.5 operational hours prior to the accident flight. ## Aircraft - Registration: [N6726G](https://openairdocs.org/deregistered/N6726G-2012-08-22), registration cancelled 2012-08-22, S/N 15072226, built 1971 (OpenAirDocs) - Reported make and model: Cessna 150L - Registry model: [Cessna 150L](https://openairdocs.org/model/cessna-150l) (registry code 2071826) (OpenAirDocs) - Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 15072226 - Airframe hours: 2513 - Engines: Continental O-200 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Michael W Newman - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 1, 1998, 150 hours before - Departed: 18KS - Destination: K50, DERBY, KS - Airport: 18KS, Cherokee Strip Airport, runway 17, 2,500 × 50 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 76; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,428 total, 147 in this make and model, 1,371 as pilot in command, 12 in the last 90 days, 1 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 160° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 99 °F, dew point 64 °F - Altimeter: 29.00 inHg - Observed at: ICT, 23 nm away ## 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 19990723009669A](https://openairdocs.org/incident/19990723009669A), Jul 23, 1999: Cessna 150L, Udall, KS, Substantial damage. On departure, no aileron control. Aircraft cartwheeled onto side of runway. (.19) on July 23, 1999, approximately 1730 central daylight time, a Cessna 150L,… ## Other investigations on N6726G (1) 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. - [NTSB DEN72DTC26](https://openairdocs.org/ntsb/DEN72DTC26), May 27, 1972: Cessna 150L (N6726G), Hillsdale, WY, substantial damage 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.