# NTSB WPR11CA105: Lantz Lake Tahoe Special, N48VP, Redding, CA, January 21, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: January 21, 2011, 12:30 local (20:30 UTC) - Place: Redding, CA - Coordinates: 40.508888, -122.293334 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.5089&lon=-122.2933&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report June 8, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 78212 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA105 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78212/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78212 - Page: https://openairdocs.org/ntsb/WPR11CA105 ## Probable cause The airplane's unintentional collision with debris during a water landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Object/animal/substance: hidden/submerged object](https://openairdocs.org/ntsb-findings/03022052): Environmental issues › Physical environment · Contributed to outcome (probable cause); cases with it: [All aircraft, 36 cases](https://openairdocs.org/ntsb-findings/03022052/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: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470) (defining event); cases with it: [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot reported that, following an uneventful water landing on a lake, the amphibious airplane was slowing down and transitioning from the step when he heard a loud noise followed by an immediate yaw to the right. Subsequently the right wing struck the water, which was followed by the pilot applying power in an attempt to raise the wing. However, the pilot was unsuccessful and elected to turn off the engine and ordered his passengers to exit the airplane. Shortly after the pilot exited the airplane, he observed it roll over upside down in the water and noticed that the right wing float was mostly separated from the wing structure. The pilot stated that he felt that the airplane had struck a floating log or some other debris in the lake during the landing. He further stated that there were no mechanical anomalies with the airplane that would have precluded normal operation. ## Factual narrative The pilot reported that following an uneventful water landing on a lake, the amphibious airplane was slowing down and transitioning from the step when he heard a loud noise followed by an immediate yaw to the right. Subsequently, the right wing struck the water, which was followed by the pilot applying power in an attempt to raise the wing. However, the pilot was unsuccessful and elected to shut the engine down and order his passengers to exit the airplane. Shortly after the pilot exited the airplane, he observed it roll over upside down in the water and noticed that the right wing float was mostly separated from the wing structure. The pilot stated that he felt that the airplane had struck a floating log or some other debris in the lake during the landing. He further stated that there were no mechanical anomalies with the airplane that would have precluded normal operations. ## Aircraft - Registration: N48VP (not matched to a registry record) - Reported make and model: LANTZ LAKE TAHOE SPECIAL - Category: Airplane - Serial number: 001 - Airframe hours: 560 - Engines: GM V8 405 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, July 10, 2010, 16 hours before - Departed: 085, Redding, CA - Destination: 085, Redding, CA - Airport: None, Lake Shasta, runway 03, water ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 69; injuries: none; airline transport, commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review March 28, 2009; seat: left; flight hours: 26,500 total, 560 in this make and model, 24,000 as pilot in command, 28 in the last 90 days, 10 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 350° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 73 °F, dew point 32 °F - Altimeter: 30.06 inHg - Observed at: RDD ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Incident 20110121000969I](https://openairdocs.org/incident/20110121000969I), Jan 21, 2011: Lantz Steph LAKE TAHOE, Redding, CA, Substantial damage. Seaplane - afater landing on lake. Wing pylon float struck a floating log. Aircraft was pulled to sde and tipped into lake. ## Docket (2 files) The files NTSB released with the investigation on February 25, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78212. 583 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 477 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40343932&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation - Pilot (item 2, .PDF, 106 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40343933&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20Pilot-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.