# NTSB NYC08CA241: Stol UC-1 Twin Bee, N9509U, Bunnell, FL, July 4, 2008 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: July 4, 2008, 10:45 local (14:45 UTC) - Place: Bunnell, FL - Coordinates: 29.778888, -81.343887 - Nearby events: https://openairdocs.org/map.md?lat=29.7789&lon=-81.3439&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: Minor injuries - Injuries: 2 minor - Status: Completed, report September 26, 2008 - Report: Approved by Office Director - Parties: FAA Tampa FSDO - NTSB case key (mKey): 68399 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC08CA241 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/68399/pdf - Page: https://openairdocs.org/ntsb/NYC08CA241 ## Probable cause The flight instructor's inadequate recovery from a bounced landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Stol UC-1, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=8640202), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md) - [Terrain: water](https://openairdocs.org/ntsb-findings/03021020): Environmental issues › Physical environment · Not specified; cases with it: [Stol UC-1, 1 case](https://openairdocs.org/ntsb-findings/03021020/cases.md?model=8640202), [All aircraft, 97 cases](https://openairdocs.org/ntsb-findings/03021020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Stol UC-1, 2 cases](https://openairdocs.org/ntsb-events/240/sequence.md?model=8640202), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) ## Analysis The certificated flight instructor (CFI) and the student pilot of the UC-1 Twin Bee completed one uneventful landing on a lake. The CFI then decided to practice glassy water landings with the student, and took off to land on a different lake. A witness stated that the airplane "bounced" when it first contacted the water, and the airplane's right pontoon separated from the wing when it "hit" the water on a second touchdown. The airplane then turned 180 degrees, and sank. The airplane sustained substantial damage from the accident. The pilot reported no mechanical anomalies with the airplane. The winds reported at an airport 11 miles to the southeast, at the time of the accident, were calm. ## Factual narrative According to the certificated flight instructor (CFI), he and the student pilot of the UC-1 Twin Bee completed one uneventful landing on a lake. The CFI then decided to practice glassy water landings with the student, and took off to land on a different lake. A witness stated that the airplane "bounced" when it first contacted the water, and the airplane's right pontoon separated from the wing when it "hit" the water on a second touchdown. . The airplane then turned 180 degrees, and sank. The airplane sustained substantial damage from the accident. The pilot reported no mechanical anomalies with the airplane. The winds reported at an airport 11 miles to the southeast, at the time of the accident, were calm. ## Aircraft - Registration: [N9509U](https://openairdocs.org/deregistered/N9509U-2013-05-23), registration cancelled 2013-05-23, S/N 021, built 1981 (OpenAirDocs) - Reported make and model: STOL UC-1 Twin Bee - Registry model: [Stol UC-1](https://openairdocs.org/model/stol-uc-1) (registry code 8640202) (OpenAirDocs) - Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 021 - Airframe hours: 3650 - Engines: Lycoming IO-360-B1D 180 horsepower reciprocating; Lycoming IO-360-B1D 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: SPS Palm Coast - Registered owner: Jerry Battenhouse - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, January 1, 2008 - Departed: XFL, Palm Coast, FL ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 22; injuries: minor; flight instructor, commercial; airplane ratings: multi-engine sea, single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review December 1, 2007; seat: right; flight hours: 1,100 total, 75 in this make and model, 900 as pilot in command, 148 in the last 90 days, 35 in the last 30 days, 2 in the last 24 hours - Student pilot; age 49; injuries: minor; student; medical: class 3, unknown; seat: left; flight hours: 85 total ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 84 °F, dew point 72 °F - Altimeter: 30.13 inHg - Observed at: OMN, 11 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 20080704855259A](https://openairdocs.org/incident/20080704855259A), Jul 4, 2008: Stolac UC1, Bunnell, FL, Substantial damage. (-23) On July 4, 2008 at approximately 1145 EDT, a stol UC-1 amphibious aircraft, registration number N9509U, s/n 021 piloted by [privacy data omitted] giving… 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.