# NTSB SEA07CA267: Cessna 340A, Schellville, CA, September 20, 2007 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 20, 2007, 12:30 local (19:30 UTC) - Place: Schellville, CA - Coordinates: 38.223888, -122.449722 - Nearby events: https://openairdocs.org/map.md?lat=38.2239&lon=-122.4497&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report November 29, 2007 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 66733 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA07CA267 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/66733/pdf - Page: https://openairdocs.org/ntsb/SEA07CA267 ## Probable cause The pilot's misjudgment of speed and distance, which resulted in an overrun of the runway. Contribution factors are the pilot's inadvertent landing at the wrong airport with a shorter runway than his intended destination and limited braking effectiveness resulting from the wet runway condition. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Overrun, landing - roll - airport facilities,runway/landing area condition - short runway/landing area (contributing factor) - landed at wrong airport - inadvertent, pilot in command (contributing factor) - airport facilities,runway/landing area condition - wet (contributing factor) - distance/speed - misjudged, pilot in command (cause) - On ground/water encounter with terrain/water, landing - roll - terrain condition - high vegetation ## Analysis The pilot landed at the wrong airport, overran the 1,500-foot-long runway, and came to rest in a vineyard on the departure end of the runway. He mistook the accident airport for his destination, which is nearby and has a 3,300-foot runway. He also noted that the runway's wet conditions hindered breaking and caused the airplane to hydroplane. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine. ## Factual narrative On September 20, 2007, about 1230 Pacific daylight time, a Cessna 340A, C-FTPA, overran the runway at Sonoma Valley Airport, Schellville, California. Tiger Paw Aviation Corporation was operating the airplane under the provisions of 14 CFR Part 91. The commercial pilot and one passenger were not injured; the airplane sustained substantial damage. The personal cross-country flight departed Boise Air Terminal, Boise, Idaho, about 1145, with a planned destination of Gnoss Field Airport, Novato, California. Visual meteorological conditions prevailed, and an IFR flight plan had been filed. In a written report to the National Transportation Safety Board, the pilot stated he was cleared by ATC for a visual approach into Gnoss Field. He acknowledged an airport in sight and flew a standard pattern for landing. The pilot landed, overran the 1,500-foot runway, and came to rest in a vineyard on the departure end of the runway. He mistook the accident airport for his destination, which is nearby and has a 3,300-foot runway. The pilot also noted that the runway's wet conditions hindered breaking and caused the airplane to hydroplane. The pilot reported no preimpact mechanical malfunctions or failures with the airframe or engine. Review of the airplane's landing performance chart revealed that if the pilot landed the airplane at maximum gross weight with full flaps extended, a ground roll of about 790 feet would have been required to stop on a dry runway. According to the FAA Airplane Flying Handbook, hydroplaning is a condition that can exist when an airplane lands on a runway surface contaminated with standing water. Hydroplaning can have serious adverse effects on ground controllability and braking efficiency. ## Aircraft - Registration: C-FTPA (not matched to a registry record) - Reported make and model: Cessna 340A - Category: Airplane - Serial number: 340A1257 - Airframe hours: 3002 - Engines: Teledyne Continental TISO-520-NB 325 horsepower reciprocating; Teledyne Continental TISO-520-NB 325 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, November 1, 2006 - Departed: BOI, Boise, ID - Destination: DVO, Novato, CA - Flight plan: IFR - Airport: 0Q3, Sonoma Valley Airport, runway 35, 1,500 × 50 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 33; injuries: none; commercial, foreign; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; seat: left; flight hours: 1,000 total, 100 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 3 knots - Visibility: 10 statute miles - Lowest ceiling: 9,000 ft overcast - Temperature: 61 °F, dew point 50 °F - Altimeter: 29.90 inHg - Observed at: APC, 8 nm away 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.