# NTSB SEA05LA100: Cessna 152TW, N7866Z, Missoula, MT, May 12, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 12, 2005, 15:00 local (21:00 UTC) - Place: Missoula, MT - Coordinates: 46.916389, -114.090553 - Nearby events: https://openairdocs.org/map.md?lat=46.9164&lon=-114.0906&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 13, 2005 - Report: Approved by Office Director - Parties: Helena FSDO - NTSB case key (mKey): 61526 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA05LA100 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61526/pdf - Page: https://openairdocs.org/ntsb/SEA05LA100 ## Probable cause The pilot's failure to maintain clearance from a taxiway identification sign as he attempted to turn off the runway onto the taxiway during the last part of the landing roll. Factors include a taxiway identification sign in the vicinity of the intersection of the runway and the taxiway. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water collision with object, landing - roll - clearance - not maintained, pilot in command (cause) - object - airport sign/marker (contributing factor) ## Analysis The pilot, who landed on Runway 25, was cleared by the tower to turn off the runway at Taxiway Echo 4. While attempting to make the right-hand turn onto the taxiway, the pilot inadvertently turned too soon, and the aircraft collided with the runway identification sign near the intersection of the runway and the taxiway. The force of the impact resulted in the right main gear leg attachment box being bent and distorted. According to the pilot, there was nothing wrong with the aircraft's directional control system or brakes. ## Factual narrative On May 12, 2005, approximately 1500 mountain daylight time, a tailwheel-equipped Cessna 150TW, N7866Z, collided with a runway identification sign during the landing roll at Missoula International Airport, Missoula, Montana. The private pilot, who was the sole occupant of the aircraft, was not injured, but the aircraft, which is owned and operated by the pilot, sustained substantial damage. The 14 CFR Part 91 personal pleasure flight, which departed St. Ignatius, Montana, about 15 minutes prior to the accident, was being operated in visual meteorological conditions. No flight plan had been filed. There was no report of an ELT activation. According to the pilot, who landed on Runway 25, he was cleared by the tower to turn off the runway at Taxiway Echo 4. While attempting to make the right-hand turn onto the taxiway, the pilot inadvertently turned too soon, and the aircraft collided with the runway identification sign near the intersection of the runway and the taxiway. The force of the impact resulted in the right main gear leg attachment box being bent and distorted. According to the pilot, there was nothing wrong with the aircraft's directional control system or brakes. ## Aircraft - Registration: [N7866Z](https://openairdocs.org/aircraft/N7866Z), registered now, S/N 15059966, built 1963 (OpenAirDocs) - Reported make and model: Cessna 152TW - Registry model: [Cessna 150C](https://openairdocs.org/model/cessna-150c) (registry code 2071808) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 59966 - Airframe hours: 4139 - Engines: Continental O-320-B2B 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Jim C. Younkin - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 1, 2004, 66 hours before - Departed: 52S, St. Ignatius, MT - Destination: KMSO, Missoula, MT - Airport: KMSO, Missoula International, runway 25, 4,612 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review April 1, 2004; seat: left; flight hours: 390 total, 148 in this make and model, 360 as pilot in command, 66 in the last 90 days, 8 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 64 °F ## 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 20050512007079A](https://openairdocs.org/incident/20050512007079A), May 12, 2005: Cessna 150C, Missoula, MT, Substantial damage. (-23) The pilot stated that when he landed on runway 25 at Missoula, Montana (mso) he had gotten too FAR to the right side of the runway and collided with a… ## Other investigations on N7866Z (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 ANC85LA061](https://openairdocs.org/ntsb/ANC85LA061), Mar 30, 1985: Cessna 150C (N7866Z), Kenai, AK, substantial damage 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.