# NTSB WPR15LA022: Cessna TU206G, N4776U, Monument, OR, October 26, 2014 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 26, 2014, 08:30 local (15:30 UTC) - Place: Monument, OR - Coordinates: 44.813787, -119.4353 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.8138&lon=-119.4353&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report November 19, 2015 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 90312 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR15LA022 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/90312/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=90312 - Page: https://openairdocs.org/ntsb/WPR15LA022 ## Probable cause The loss of braking action during the landing roll on a gravel runway for reasons that could not be determined based on the available information. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Cessna TU206G, 2 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=2073357), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) - [Runway/land/takeoff/taxi surface](https://openairdocs.org/ntsb-findings/03023000): Environmental issues › Physical environment · Effect on equipment (probable cause); cases with it: [Cessna TU206G, 1 case](https://openairdocs.org/ntsb-findings/03023000/cases.md?model=2073357), [All aircraft, 253 cases](https://openairdocs.org/ntsb-findings/03023000/cases.md) - [Terrain: sloped/uneven terrain](https://openairdocs.org/ntsb-findings/03021017): Environmental issues › Physical environment · Contributed to outcome (probable cause); cases with it: [Cessna TU206G, 1 case](https://openairdocs.org/ntsb-findings/03021017/cases.md?model=2073357), [All aircraft, 270 cases](https://openairdocs.org/ntsb-findings/03021017/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna TU206G, 4 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2073357), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Cessna TU206G, 2 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=2073357), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis The pilot stated that, after a 15-minute flight, he landed the airplane on a familiar, gravel runway at a slow groundspeed. Immediately thereafter, the airplane began to veer right, and the pilot used the brakes and aileron inputs in an effort to return to the runway center. Despite the pilot's attempts to regain directional control, the airplane continued off the right side of the runway, struck a ditch, and then came to rest inverted. The pilot reported that the loss of directional control was precipitated by a landing gear malfunction and that a brake likely seized after touchdown. Although the brakes could not be operated with the pedals during postaccident examination of the braking system, it could not be determined whether this was a result of the accident and/or the subsequent recovery. ## Factual narrative On October 26, 2014, about 0830 Pacific daylight time, a Cessna TU206G, N4776U, veered of the runway and collided with a ditch at a private airfield in Monument, Oregon. The pilot/owner was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The commercial pilot, the sole occupant, was not injured; the airplane sustained substantial damage. The local personal flight departed from Monument Municipal Airport, Monument, Oregon about 0815 with a planned destination of the airfield that the accident occurred. Visual meteorological conditions prevailed and the pilot had not filed a visual flight rules (VFR) flight plan.The pilot stated that the airplane touched down on the gravel runway at a slow groundspeed; his farm was near the runway and he had landed there regularly. Immediately thereafter, the airplane began to veer to the right (north). The pilot used both the brakes and aileron inputs in an effort to return to the runway center. Despite the pilot's attempts to regain directional control, the airplane continued off the right side of the runway and collided into a ditch. The airplane came to rest inverted incurring damage to the wings and tail section. The pilot further stated that the loss of directional control was precipitated by a landing gear malfunction. He opined that a brake likely seized after touchdown. According to the recovery personnel, the left tire made a long track in the gravel angling to the right and then the track dropped off the edge of the runway after the airplane's right wing tip collided with a tree. Indications on the runway (skid marks in the crushed rock) indicated that the left brake was working, but there was no traction due to the looseness and depth of the gravel surface. The nose wheel rolled but still dug a trough, the right wheel only touched down a few times, appearing to have been in the air most of the time. A Federal Aviation Administration (FAA) inspector looked at the disassembled airplane following the recovery and examined the brake system. He noted that they were both intact and both tires turned freely. He was not able to operate the brakes with the pedals, and it could not be determined if that was a result of the accident and/or subsequent recovery. ## Aircraft - Registration: [N4776U](https://openairdocs.org/aircraft/N4776U), registered now, S/N U20605096, built 1979 (OpenAirDocs) - Reported make and model: CESSNA TU206G - Registry model: [Cessna TU206G](https://openairdocs.org/model/cessna-tu206g) (registry code 2073357) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: U20605096 - Year built: 1979 - Airframe hours: 2923 - Engines: Continental Motors IO-520M 310 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, December 15, 2013, 36 hours before - Departed: 12S, MONUMENT, OR - Destination: Monument, OR - Airport: runway 270, 1,500 × 25 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 74; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review March 12, 2014; seat: left; restraint: 3-point; flight hours: 3,225 total, 1,200 in this make and model, 3,100 as pilot in command, 40 in the last 90 days, 25 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 240° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 6,000 ft broken - Temperature: 43 °F, dew point 32 °F - Altimeter: 30.04 inHg - Observed at: GCD, 40 nm away ## 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 20141026019239A](https://openairdocs.org/incident/20141026019239A), Oct 26, 2014: Cessna TU206G, Monument, OR, Substantial damage. The aircraft touched down slightly right of center on a private gravel runway located near Monument Oregon. The aircraft then bounced twice and then continued… ## Other investigations on N4776U (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 LAX08CA210](https://openairdocs.org/ntsb/LAX08CA210), Jul 1, 2008: Cessna TU206G (N4776U), Coeur d'Alene, ID, substantial damage. Probable cause: The pilot's failure to maintain proper runway alignment and clearance from a large rock on the side of the runway. Contributing to the accident was the failure of the pilot to maintain the runway… ## Docket (2 files) The files NTSB released with the investigation on October 19, 2015, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=90312. 1.0 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 941 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432818&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Records of Conversation (item 2, .PDF, 105 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432819&FileExtension=.PDF&FileName=Records%20of%20Conversation-Master.PDF 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.