# NTSB WPR18LA175: Cessna P210N, N7546K, Lewiston, ID, May 29, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 3 · Limited · Final report - Date: May 29, 2018, 09:00 local (16:00 UTC) - Place: Lewiston, ID - Coordinates: 46.373332, -117.021385 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.3733&lon=-117.0214&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 3 - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 97547 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR18LA175 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/97547/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=97547 - Page: https://openairdocs.org/ntsb/WPR18LA175 ## Probable cause The failure of a hydraulic line in the landing gear system, which resulted in the pilot's inability to lower the gear and a subsequent gear-up landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: main landing gear](https://openairdocs.org/ntsb-findings/01023210): Aircraft › Aircraft systems · Failure (probable cause); cases with it: [Cessna P210N, 2 cases](https://openairdocs.org/ntsb-findings/01023210/cases.md?model=2073454), [All aircraft, 241 cases](https://openairdocs.org/ntsb-findings/01023210/cases.md) - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Failure (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. - [Enroute-cruise: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330); 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-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) (defining event); cases with it: [Cessna P210N, 7 cases](https://openairdocs.org/ntsb-events/090/sequence.md?model=2073454), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) ## Analysis After climbing to cruise altitude, the pilot noted that the landing gear position indicator lights showed that the landing gear were not retracted, and the pilot was unable to fully extend or retract the gear. He declared an emergency and landed with the landing gear retracted, resulting in substantial damage to the horizontal stabilizer. Examination revealed that the rigid hydraulic line connecting the hydraulic powerpack to the bulkhead had failed at the ferrule. A review of maintenance records revealed that this line had recently been duplicated and replaced due to a failure in the same area. The reason for the failure was not determined based on the available evidence. ## Factual narrative On May 29, 2018 about 0900 Pacific daylight time, a Cessna P210, N7546K, was substantially damaged when it was involved in an accident near Lewiston, Idaho. The private pilot, the sole occupant, was not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that, following departure, he climbed to his planned enroute altitude of 7,500 ft mean sea level. He noticed that the airspeed was lower than expected and then saw that the landing gear position indicator light showed that the gear was not retracted. The pilot cycled the gear but was unable to fully extend or retract them. He then attempted to manually lower the landing gear with the emergency hand pump but was unsuccessful. He declared an emergency and subsequently landed with the gear retracted, resulting in substantial damage to the horizontal stabilizer spar. Examination revealed that the rigid hydraulic line connecting the powerpack to the bulkhead had failed at the ferrule. A review of the airplane's maintenance records revealed that, on March 13, 2018, at a tachometer time of 384 hours, a maintenance facility completed a check of the landing gear. A subsequent entry, dated May 17, 2018, and about 8.6 flight hours after the previous maintenance, stated, "Landing gear inop for up/dn. Pilot report did pump gear down." The entry indicated that personnel performed troubleshooting on the source of a hydraulic fluid leak, which they determined to be at the hydraulic power pack gear system. The entry stated that the tube fitting line cracked at the flare below the ferrule, and a new line of aluminum tubing the same size and length as the failed tubing was fabricated and installed. ## Aircraft - Registration: [N7546K](https://openairdocs.org/deregistered/N7546K-2025-08-18), registration cancelled 2025-08-18, S/N P21000407, 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: P21000407 - Year built: 1979 - Airframe hours: 6450 - Engines: Continental TSIO-520 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Departed: JSY, Joseph, OR - Destination: LWS, Lewiston, ID - Airport: LWS, Lewiston-Nez Perce County, runway 30, 5,002 × 100 ft, asphalt - Equipment: Auto-pilot ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; seat: left; restraint: 3-point; flight hours: 3,000 total, 1,385 in this make and model, 3,000 as pilot in command, 450 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 64 °F, dew point 46 °F - Altimeter: 29.97 inHg - Observed at: KLWS ## Docket (3 files) The files NTSB released with the investigation on March 11, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=97547. 1.1 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 9 pages, 621 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10683693&FileExtension=pdf&FileName=Z%20-%20Attachment%2001%20-%206120%20(9%20pages)_Redacted-Rel.pdf - Records of conversation (item 2, PDF, 1 page, 90 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10657725&FileExtension=pdf&FileName=Z%20-%20Attachment%2003%20-%20Records%20of%20Conversation-Rel.pdf - Photographs and maintenance excerpts (item 3, PDF, 3 pages, 353 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=10679625&FileExtension=pdf&FileName=Z%20-%20Attachment%2002%20-%20Photos%20and%20Records-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.