# NTSB ANC05LA076: Cessna 170B, N4606C, Dillingham, AK, May 14, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 14, 2005, 15:50 local (23:50 UTC) - Place: Dillingham, AK - Coordinates: 59.033332, -158.5 - Nearby events: https://openairdocs.org/map.md?lat=59.0333&lon=-158.5000&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 20, 2005 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: Federal Aviation Administration - NTSB case key (mKey): 61487 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC05LA076 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61487/pdf - Page: https://openairdocs.org/ntsb/ANC05LA076 ## Probable cause The pilot's inadequate compensation for wind conditions, which resulted in a loss of control during the landing roll. Factors associated with the accident are a crosswind, and an inadvertent ground loop/swerve. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - weather condition - crosswind (contributing factor) - compensation for wind conditions - inadequate, pilot in command (cause) - ground loop/swerve - inadvertent, pilot in command (contributing factor) ## Analysis The private pilot was landing on a paved runway in a tundra tire and tailwheel-equipped airplane with an 80 degree right crosswind of 8 knots. The pilot stated that the airplane bounced slightly and settled onto the right main tire, and then veered to the left. He attempted to correct to the right, but the airplane went off the runway, and ground-looped to the right. The airplane sustained structural damage to the left wing and fuselage. The pilot noted there were no preaccident mechanical problems with the airplane. ## Factual narrative On May 14, 2005, about 1550 Alaska daylight time, a tundra tire and tailwheel-equipped Cessna 170B airplane, N4606C, sustained substantial damage while landing at the Dillingham Airport, Dillingham, Alaska. The airplane was being operated as a visual flight rules (VFR) personal area flight under Title 14, CFR Part 91, when the accident occurred. The private pilot and the two passengers were not injured. The flight originated at the Togiak Airport, Togiak, Alaska, about 1515. Visual meteorological conditions prevailed, and no flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on May 16, the pilot reported that he was landing on runway 01, which required a correction for a right crosswind. The pilot stated that as the airplane touched down on the dry, paved runway, it bounced slightly and settled onto the right main tire, and then veered to the left. He said he attempted to correct to the right, but the airplane went off the runway, and ground-looped to the right. The airplane sustained structural damage to the left wing and fuselage. The pilot noted there were no preaccident mechanical problems with the airplane. A weather observation at Dillingham at the time of the accident consisted of: Sky conditions and ceiling, 2,200 feet scattered, 3,200 feet broken; visibility, 25 statute miles; wind, 090 degrees (magnetic) at 8 knots. The pilot did not return the NTSB Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2). ## Aircraft - Registration: [N4606C](https://openairdocs.org/deregistered/N4606C-2018-12-04), registration cancelled 2018-12-04, S/N 25550 (OpenAirDocs) - Reported make and model: Cessna 170B - Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs) - Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 25550 - Engines: Continental C-145 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Donnald S. Bingman - Registered owner: James H. Bingman - Airworthiness certificate: Standard, Normal - Departed: TOG, Togiak, AK - Destination: DLG, Dillingham, AK - Airport: DLG, Dillingham, runway 01, 6,404 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; injuries: none; private; airplane ratings: single-engine land; medical: class 3, unknown; seat: left; flight hours: 400 total ## Weather - Conditions: Visual (VMC), Day - Wind: 90° at 8 knots - Visibility: 25 statute miles - Lowest ceiling: 3,200 ft broken - Temperature: 52 °F, dew point 39 °F - Altimeter: 29.36 inHg - Observed at: DLG ## 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 20050514011419A](https://openairdocs.org/incident/20050514011419A), May 14, 2005: Cessna 170B, Dillingham, AK, Substantial damage. (-23) Pilot lost control while landing and ground looped. ## Other investigations on N4606C (3) 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 ANC92LA004](https://openairdocs.org/ntsb/ANC92LA004), Oct 11, 1991: Cessna 170B (N4606C), Chugiak, AK, substantial damage. Probable cause: THE STUDENT PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING THE TAKEOFF RUN. - [NTSB ANC76AA045](https://openairdocs.org/ntsb/ANC76AA045), Sep 28, 1975: Cessna 170 (N4606C), Bethel, AK, substantial damage - [NTSB ANC73DAG69](https://openairdocs.org/ntsb/ANC73DAG69), Dec 10, 1972: Cessna 170B (N4606C), Bethel, 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.