# NTSB CEN11CA155: Cessna R182, N6187S, Houston, TX, January 19, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: January 19, 2011, 15:04 local (21:04 UTC) - Place: Houston, TX - Coordinates: 29.640556, -95.273887 - Nearby events: https://openairdocs.org/map.md?lat=29.6406&lon=-95.2739&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report May 26, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA Houston FSDO - NTSB case key (mKey): 78196 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11CA155 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78196/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78196 - Page: https://openairdocs.org/ntsb/CEN11CA155 ## Probable cause The failure of the landing gear to fully extend and lock in the down position due to the inoperative electric pump motor. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Malfunction (probable cause); cases with it: [Cessna R182, 10 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=2072734), [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) - [Attention/monitoring: task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520): Personnel issues › Psychological · Pilot; cases with it: [Cessna R182, 2 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md?model=2072734), [All aircraft, 330 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330); cases with it: [Cessna R182, 4 cases](https://openairdocs.org/ntsb-events/330/sequence.md?model=2072734), [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) - [Landing: Landing gear not configured](https://openairdocs.org/ntsb-events/095); cases with it: [Cessna R182, 15 cases](https://openairdocs.org/ntsb-events/095/sequence.md?model=2072734), [All aircraft, 584 cases](https://openairdocs.org/ntsb-events/095/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Cessna R182, 8 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2072734), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing-landing roll: Dragged wing/rotor/float/other](https://openairdocs.org/ntsb-events/093); cases with it: [Cessna R182, 2 cases](https://openairdocs.org/ntsb-events/093/sequence.md?model=2072734), [All aircraft, 319 cases](https://openairdocs.org/ntsb-events/093/sequence.md) ## Analysis The pilot was returning to the airport after a local maintenance flight. While completing the before-landing checklist, the pilot did not detect an incomplete gear extension. After touchdown, at 70 knots, both main landing gear legs collapsed. The nose gear remained extended during the event and the rear fuselage and left horizontal stabilizer contacted the concrete pavement. The operator's subsequent examination of the hydraulic power pack revealed that the electric pump motor was inoperative. The failure of the power pack before the end of the gear extension cycle would result in a fully extended nose gear and a partial extension of the main landing gear legs. ## Factual narrative The pilot was returning to the airport after a local maintenance flight. During the before landing cockpit checks the pilot did not detect an incomplete gear extension. After touchdown, at about 70 knots, both main landing gear legs collapsed. The nose gear remained extended during the event and the rear fuselage and left horizontal stabilizer contacted the concrete pavement. The operator's subsequent examination of the hydraulic power pack showed the electric pump motor was inoperative. The failure of the power pack before the end of the gear extension cycle would result in a fully extended nose gear and a partial extension of the main landing gear legs. ## Aircraft - Registration: [N6187S](https://openairdocs.org/deregistered/N6187S-2017-06-12), registration cancelled 2017-06-12, S/N R18201644 (OpenAirDocs) - Reported make and model: CESSNA R182 (NO SERIES) - Registry model: [Cessna R182](https://openairdocs.org/model/cessna-r182) (registry code 2072734) (OpenAirDocs) - Category: Airplane - Serial number: R18201644 - Airframe hours: 2475 - Engines: Lycoming O-540-J3C5D 235 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Conversion Aviation Inc - Registered owner: Conversion Aviation Inc - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 30, 2010 - Departed: LBX, Angleton, TX - Destination: HOU, Houston, TX - Airport: HOU, William P. Hobby Airport, runway 12L, 5,148 × 100 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 32; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review April 4, 2009; seat: left; flight hours: 4,160 total, 15 in this make and model, 1,112 as pilot in command, 80 in the last 90 days, 25 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 150° at 10 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 48 °F - Altimeter: 29.98 inHg - Observed at: KHOU ## 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 20110119000659A](https://openairdocs.org/incident/20110119000659A), Jan 19, 2011: Cessna R182, Houston, TX, Substantial damage. Pilot stated he lowered landing gear 5 miles from runway. After touch down the nose appeared to rise. Pilot stated he pushed the yoke forward, but he realized… ## Docket (1 files) The files NTSB released with the investigation on March 14, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78196. 285 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 285 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40343488&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF 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.