# NTSB LAX07CA110: Cessna T210N, N628TT, Barstow, CA, March 16, 2007 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 16, 2007, 16:00 local (23:00 UTC) - Place: Barstow, CA - Coordinates: 34.85361, -116.797775 - Nearby events: https://openairdocs.org/map.md?lat=34.8536&lon=-116.7978&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report June 27, 2007 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 65448 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX07CA110 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/65448/pdf - Page: https://openairdocs.org/ntsb/LAX07CA110 ## Probable cause The pilot's failure to properly execute the manual landing gear extension procedures. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Wheels up landing, landing - procedures/directives - not followed, pilot in command (cause) - hydraulic system,motor - failure - emergency procedure - improper use of, pilot in command (cause) ## Analysis The single engine airplane made a gear up landing that resulted in substantial damage to the airplane. The pilot reported that he was cruising at 10,500 feet, when his autopilot kicked off. He reset the autopilot and it kicked off again a few minutes later. He checked his instruments and found that the ammeter was discharging, with the system voltage rapidly dropping from 28 volts towards 20 volts. He notified ATC that he would descend into a nearby airport, reduced all nonessential electrical loads, and slowed the airplane down. The system voltage was now about 12-14 volts. He setup an orbit over the airport, and attempted lowering the landing gear normally, which was not successful. He made numerous attempts to manually pump down the landing gear using the hand-operated emergency hydraulic pump handle. The nose wheel extended; however, the main landing gear only extended 3 or 4 inches. After circling 30 to 45 minutes, the pilot decided to land the airplane gear up. He landed on the runway, slid about 1,000 feet, and veered off to its south side. Ground crews were able to pull the landing gear into the down and locked position after putting the airplane on jacks. There was no evidence of a hydraulic fluid leak. The pilot reported that during a further examination of the airplane he determined that the landing gear motor malfunctioned, and that he had not properly engaged the emergency pump handle prior to attempting a manual extension of the landing gear. ## Factual narrative The pilot reported to the National Transpiration Safety Board investigator that he was cruising at 10,500 feet over Dagget, California, when his autopilot kicked off. He reset the autopilot and it kicked off again a few minutes later. He checked his instruments and found that the ammeter was discharging rapidly, dropping from 28 volts towards 20 volts. He notified ATC that he would descend into Dagget-Barstow Airport, reduced all nonessential electrical loads, and slowed the airplane down. The discharge was now about 12-14 volts, he setup an orbit over the Dagget airport, and attempted lowering the landing gear normally, which was not successful. He made numerous attempts to manually pump down the landing gear using the hand-operated hydraulic pump handle. The nose wheel extended; however, the main landing gear only extended 3 or 4 inches. After circling 30 to 45 minutes the pilot decided to land the airplane gear up. He landed on runway 26, slid about 1,000 feet, and veered off to its south side. Ground crews were able to pull the landing gear into the down and locked position. There was no evidence of a hydraulic fluid leak. The pilot reported that during a further examination of the airplane he determined that the landing gear motor malfunctioned, and that he had not properly engaged the emergency pump handle prior to attempting a manual extension of the landing gear. ## Aircraft - Registration: [N628TT](https://openairdocs.org/aircraft/N628TT), registered now, S/N 21063058, built 1978 (OpenAirDocs) - Reported make and model: Cessna T210N - Registry model: [Cessna T210N](https://openairdocs.org/model/cessna-t210n) (registry code 2073456) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 21063058 - Airframe hours: 3600 - Engines: Teledyne Continental Motors TSIO-520 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Troy J. Tollen - Airworthiness certificate: Standard, Normal - Departed: KHND, Henderson, NV - Destination: KOAK, Oakland, CA - Airport: KDAG, Dagget-Barstow, runway 26, 6,400 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 38; private; airplane ratings: single-engine land; medical: class 3; flight hours: 650 total, 450 in this make and model, 10 in the last 90 days, 5 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 84 °F 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.