# NTSB SEA02LA015: Cessna 402B, N910WT, Pasco, WA, November 15, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 15, 2001, 15:30 local (23:30 UTC) - Place: Pasco, WA - Coordinates: 46.409446, -118.900871 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.4094&lon=-118.9009&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report February 20, 2002 - Report: Approved by Office Director - Parties: Spokane FSDO - NTSB case key (mKey): 53803 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA02LA015 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53803/pdf - Page: https://openairdocs.org/ntsb/SEA02LA015 ## Probable cause the pilot's failure to keep the aircraft from touching down short of the displaced threshold, and his failure to maintain directional control after the aircraft's left main gear tire deflated as a result of impacting the lip at the beginning of the subject threshold. Factors include the deflation of the main gear tire, and soft terrain near the side of the runway. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Gear collapsed, landing - roll - proper touchdown point - not attained, pilot in command (cause) - landing gear,tire - deflated (contributing factor) - directional control - not maintained, pilot in command (cause) - terrain condition - soft (contributing factor) - landing gear - overload ## Analysis The pilot inadvertently allowed the aircraft to make its initial touchdown on the two inch-high lip of the displaced threshold. As the left main gear tire impacted this lip, it began to rapidly lose air and go flat. As the landing roll continued, the aircraft started to veer to the left, and the pilot was unable to keep it from departing the side of the runway. After it departed the runway, the aircraft's left main gear encountered soft terrain and experienced an overload collapse. ## Factual narrative On November 15, 2001, approximately 1530 Pacific standard time, a Cessna 402B, N910WT, experienced a collapse of the left main landing gear during the landing roll at Tri-Cities Airport, Pasco, Washington. The airline transport pilot and his passenger were not injured, but the aircraft, which is owned and operated by Aeroflite Executive Services, sustained substantial damage. The 14 CFR Part 91 business flight, which departed Boeing Field, Seattle, Washington, about 50 minutes prior to the accident, was being operated in visual meteorological conditions. The aircraft was on an IFR flight plan. According to the pilot, he inadvertently let the aircraft touch down on the front lip of the displaced threshold. When the left main gear impacted the lip, which was about two inches high, it started rapidly loosing air and going flat. As the landing roll continued, the aircraft began veering to the left, and the pilot was unable to keep it from departing the side of the runway surface. After it departed the runway, the left main gear sank into the soft dirt surface and experienced an overload collapse. ## Aircraft - Registration: [N910WT](https://openairdocs.org/deregistered/N910WT-2018-01-29), registration cancelled 2018-01-29, S/N 402B0392, built 1973 (OpenAirDocs) - Reported make and model: Cessna 402B - Registry model: [Cessna 402B](https://openairdocs.org/model/cessna-402b) (registry code 207590P) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 402B0392 - Airframe hours: 12961 - Engines: Continental TSIO-520 300 horsepower reciprocating - Damage: Substantial damage - Flight: Other work use, Part 91 - Registered owner: Aeroflite Executive Services - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 20, 2001, 30 hours before - Departed: BFI, Seattle, WA - Destination: PSC, Pasco, WA - Flight plan: IFR - Airport: PSC, Tri-Cities Airport, runway 21, 7,700 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 34; injuries: none; flight instructor, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; last flight review May 27, 2001; seat: left; flight hours: 3,700 total, 2,200 in this make and model, 3,600 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 50 °F, dew point 39 °F - Altimeter: 29.95 inHg ## 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 20011115031059A](https://openairdocs.org/incident/20011115031059A), Nov 15, 2001: Cessna 402B, Pasco, WA, No damage. (-23) Upon landing on November 15, 2001 runway 12 at the Pasco, WA (psc) airport, the pilot allowed the aircraft, a Cessna 402B N910WT, main landing gear… ## Other investigations on N910WT (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 ATL92LA133](https://openairdocs.org/ntsb/ATL92LA133), Jun 29, 1992: Cessna 402B (N910WT), Tuscaloosa, AL, substantial damage. Probable cause: THE IMPROPER INSTALLATION OF THE EMERGENCY EXIT, BY AN UNKNOWN PERSON, WHICH RESULTED IN ITS SEPARATION, IN FLIGHT. 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.