# NTSB DFW08CA099: Cessna 310Q, N7935Q, Roswell, NM, April 11, 2008 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: April 11, 2008, 17:47 local (23:47 UTC) - Place: Roswell, NM - Coordinates: 33.301387, -104.530555 - Nearby events: https://openairdocs.org/map.md?lat=33.3014&lon=-104.5306&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Defining event: [Taxi-from runway: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 30, 2008 - Report: Approved by Office Director - Parties: FAA FSDO - NTSB case key (mKey): 67824 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DFW08CA099 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/67824/pdf - Page: https://openairdocs.org/ntsb/DFW08CA099 ## Probable cause The airframe and powerplant mechanic's incorrect reassembly of the landing gear. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: main landing gear attach sec](https://openairdocs.org/ntsb-findings/01023211): Aircraft › Aircraft systems · Incorrect service/maintenance; cases with it: [Cessna 310Q, 2 cases](https://openairdocs.org/ntsb-findings/01023211/cases.md?model=2074242), [All aircraft, 66 cases](https://openairdocs.org/ntsb-findings/01023211/cases.md) - [Maintenance: installation](https://openairdocs.org/ntsb-findings/02062035): Personnel issues › Task performance · Maintenance personnel (probable cause); cases with it: [Cessna 310Q, 2 cases](https://openairdocs.org/ntsb-findings/02062035/cases.md?model=2074242), [All aircraft, 371 cases](https://openairdocs.org/ntsb-findings/02062035/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Cessna 310Q, 3 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2074242), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Taxi-from runway: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Cessna 310Q, 3 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2074242), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot initiated a left turn while taxiing to the parking area, and the right main landing gear collapsed, resulting in substantial damage to the airplane's right wing and horizontal stabilizer. A Federal Aviation Administration (FAA) inspector did an on scene investigation, and determined that the landing gear was not properly reassembled after maintenance was performed. The certified airframe and powerplant mechanic left out a bushing on the right main landing gear side link lower attach point. The incorrect reassembly allowed the down-lock tension to fall below allowable limits during subsequent cycles of the landing gear system, resulting in the gear collapse. ## Factual narrative The pilot initiated a left turn while taxiing to the parking area, when the right main landing gear collapsed, resulting in substantial damage to the aircraft's right wing and horizontal stabilizer. The pilot, sole occupant was not injured. A Federal Aviation Administration (FAA) inspector conducted an on scene investigation and determined that the landing gear was not properly reassembled after maintenance was performed. The certified airframe and powerplant mechanic left out a bushing on the right main landing gear side link lower attach point. The incorrect reassembly allowed the down-lock tension to fall below allowable limits during subsequent cycles of the landing gear system, resulting in the gear collapse. ## Aircraft - Registration: [N7935Q](https://openairdocs.org/aircraft/N7935Q), registered now, S/N 310Q0667 (OpenAirDocs) - Reported make and model: Cessna 310Q - Registry model: [Cessna 310Q](https://openairdocs.org/model/cessna-310q) (registry code 2074242) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 310Q-0667 - Airframe hours: 7928 - Engines: Teledyne Continental IO-470-VO 275 horsepower reciprocating; Teledyne Continental IO-470-VO 275 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: Aero Charter and Transport, Inc., doing business as Aero Charter and Transport, Inc. - Registered owner: D + A Investments LLC - Airworthiness certificate: Standard, Normal - Last inspection: Continuous airworthiness, April 1, 2008 - Departed: KHOB, Hobbs, NM - Destination: KROW, Roswell, NM - Flight plan: Unknown - Airport: KROW, Roswell International Air Cent, runway 35, 9,999 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: none; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review April 1, 2007; seat: left; flight hours: 4,300 total, 300 in this make and model, 4,100 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 330° at 19 knots, gusting 30 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 66 °F, dew point 64 °F - Altimeter: 29.96 inHg - Observed at: KROW ## Other investigations on N7935Q (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 FTW73FPJ25](https://openairdocs.org/ntsb/FTW73FPJ25), Jun 27, 1973: Cessna 310Q (N7935Q), El Reno, OK, destroyed 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.