# NTSB CEN21LA460: Cessna P210N, N4614K, El Paso, TX, September 28, 2021 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: September 28, 2021, 15:02 local (21:02 UTC) - Place: El Paso, TX - Coordinates: 31.802057, -106.37895 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=31.8021&lon=-106.3790&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: Flight Standards District Office - NTSB case key (mKey): 103993 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN21LA460 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/103993/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=103993 - Page: https://openairdocs.org/ntsb/CEN21LA460 ## Probable cause A faulty landing gear pressure switch prematurely deactivated the landing gear motor during extension, which resulted in the landing gear collapsing during rollout. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Use of equip/info: use of checklist](https://openairdocs.org/ntsb-findings/02063030): Personnel issues › Task performance · Pilot; cases with it: [Cessna P210N, 7 cases](https://openairdocs.org/ntsb-findings/02063030/cases.md?model=2073454), [All aircraft, 336 cases](https://openairdocs.org/ntsb-findings/02063030/cases.md) - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Inoperative (probable cause); cases with it: [Cessna P210N, 12 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md?model=2073454), [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330) (defining event); cases with it: [Cessna P210N, 8 cases](https://openairdocs.org/ntsb-events/330/sequence.md?model=2073454), [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Cessna P210N, 21 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2073454), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis During the landing rollout, the right main landing gear collapsed and the airplane veered to the right, which resulted in substantial damage to the horizontal stabilizer. Postaccident examination revealed that the landing gear electric motor would deactivate prematurely due to a faulty pressure switch that prevented full extension of the landing gear. No other landing gear anomalies were observed, including during manual operation of the landing gear hand pump. A landing gear maintenance discrepancy was recorded as “landing gear slow to operate, sometimes need to use handpump” during the last annual inspection. Maintenance personnel troubleshot the landing gear discrepancy and identified a pressure switch to be out of tolerance at 1,100 psi and shimmed the switch to 1,500 psi. During the approach to landing, the pilot recalled that the green landing gear down light was on and he did not hear the landing gear warning horn; however, both the landing gear down light and warning horn tested normally during the examination. ## Aircraft - Registration: [N4614K](https://openairdocs.org/deregistered/N4614K-2023-01-31), registration cancelled 2023-01-31, S/N P21000237, built 1979 (OpenAirDocs) - Reported make and model: CESSNA P210N - Registry model: [Cessna P210N](https://openairdocs.org/model/cessna-p210n) (registry code 2073454) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: P21000237 - Year built: 1979 - Airframe hours: 2376 - Engines: Continental TSIO-520-P2B 285 horsepower reciprocating - Damage: Substantial damage - Flight: Ferry, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 23, 2021 - Departed: DNA, Santa Teresa, NM - Destination: ELP, El Paso, TX - Airport: ELP, El Paso Intl, runway 08R/26L, 9,025 × 150 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 36; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review February 1, 2020; seat: left; restraint: 3-point; flight hours: 950 total, 25 in this make and model, 750 as pilot in command, 42 in the last 90 days, 30 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 260° at 9 knots, gusting 23 - Visibility: 10 statute miles - Lowest ceiling: 18,000 ft broken - Temperature: 81 °F, dew point 45 °F - Altimeter: 29.94 inHg - Observed at: KELP, 1 nm away - METAR: KELP 282059Z 26009G23KT 10SM FEW070 SCT140 BKN180 27/07 A2994 RMK AO2 T02670067 ## 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 20210928016439A](https://openairdocs.org/incident/20210928016439A), Sep 28, 2021: Cessna P210N, El Paso, TX, Substantial damage. On October 08, 2021, at 1502 MDT, a Cessna P210N, N4614K, [privacy data omitted], had the right main landing gear callapse while on landing rollout at El Paso… ## Other investigations on N4614K (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 CHI95LA137](https://openairdocs.org/ntsb/CHI95LA137), Apr 26, 1995: Cessna P210N (N4614K), Dodge City, KS, minor damage. Probable cause: fatigue and subsequent catastrophic failure of the connecting rod originating from the decarburized area on the shank of the rod. Factors were the low cloud weather condition and the ditch. ## Docket (5 files) The files NTSB released with the investigation on February 7, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=103993. 9.7 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 5.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13179292&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Photo of airplane at accident site (item 2, PDF, 1 page, 209 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13178203&FileExtension=pdf&FileName=Photo%20of%20stab%20damage--Rel.pdf - Landing gear examination (item 3, PDF, 1 page, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13179021&FileExtension=pdf&FileName=N4614K%20-%20Invoice_Redacted-Rel.pdf - Landing gear maintenance (item 4, PDF, 1 page, 544 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13179302&FileExtension=pdf&FileName=Maintenance%20on%20landing%20gear%20-%20previous_Redacted-Rel.pdf - Maintenance log - excerpt of annual inspection (item 5, PDF, 1 page, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13181286&FileExtension=pdf&FileName=Maintenance%20Log%20-%20excerpt_Redacted-Rel.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.