# NTSB SEA06CA171: Piper PA-23-250, N6549A, Greenacres, WA, August 7, 2006 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 7, 2006, 15:30 local (22:30 UTC) - Place: Greenacres, WA - Coordinates: 47.608612, -117.180557 - Nearby events: https://openairdocs.org/map.md?lat=47.6086&lon=-117.1806&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report December 28, 2006 - Report: Approved by Office Director - NTSB case key (mKey): 64408 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA06CA171 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64408/pdf - Page: https://openairdocs.org/ntsb/SEA06CA171 ## Probable cause The pilot's selection of an unsuitable landing runway which resulted in a runway overrun and collision with a fence. A contributing factor was the wet runway condition. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Overrun, landing - roll - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (cause) - airport facilities,runway/landing area condition - wet (contributing factor) - On ground/water collision with object, landing - roll - object - fence ## Analysis According to the pilot, "after landing, braking action was very poor due to a heavily irrigated section of runway 16 from mid-field to the departure end." The airplane's tires "appeared to hydroplane" on the wet grass runway surface, and the pilot was unable to stop the airplane from overrunning the end of the runway and striking a fence. An FAA inspector examined the airplane and reported that the bottom wing skin was torn and one aileron had a hole punctured in it. The pilot commented that the accident could have been prevented by "more close monitoring of the runway watering system" and "a physical check of the entire runway before takeoff to determine any variances in surface condition." ## Factual narrative On August 7, 2006, about 1530 Pacific daylight time, a Piper PA-23-250, N6549A, overran the runway and struck a fence during landing at Sky Meadows Airpark, Greenacres, Washington. The commercial pilot and his two passengers were not injured. The airplane, which was being operated by the pilot, sustained substantial damage. Visual meteorological conditions prevailed and no flight plan was filed for the 14 CFR Part 91 personal local flight. The flight departed from Sky Meadows about 45 minutes before the accident. According to the pilot, "after landing, braking action was very poor due to a heavily irrigated section of runway 16 from mid-field to the departure end." The airplane's tires "appeared to hydroplane" on the wet grass runway surface, and the pilot was unable to stop the airplane from overrunning the end of the runway and striking a fence. An FAA inspector examined the airplane and reported that the bottom wing skin was torn and one aileron had a hole punctured in it. The pilot commented that the accident could have been prevented by "more close monitoring of the runway watering system" and "a physical check of the entire runway before takeoff to determine any variances in surface condition." ## Aircraft - Registration: [N6549A](https://openairdocs.org/aircraft/N6549A), registered now, S/N 27-7954006, built 1978 (OpenAirDocs) - Reported make and model: Piper PA-23-250 - Registry model: [Piper PA-23-250](https://openairdocs.org/model/piper-pa-23-250) (registry code 7102308) (OpenAirDocs) - Registry engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 27-7954006 - Engines: Lycoming IO-540-C4B5 reciprocating; Lycoming IO-540-C4B5 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Departed: WN92, Greenacres, WA - Destination: WN92 - Airport: WN92, Sky Meadows Airpark, runway 16 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 45; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2; flight hours: 3,898 total, 16 in this make and model, 11 in the last 90 days, 11 in the last 30 days ## Weather - Conditions: Visual (VMC), Day ## 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 20060807017699A](https://openairdocs.org/incident/20060807017699A), Aug 7, 2006: Piper PA23250, Spokane, WA, Substantial damage. (-23) The pilot [privacy data omitted] ^ stated he was landing at the skymeadows airport (WN92) on August 7, 2006. He was landing to the south with a 4 to 6… 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.