# NTSB LAX00LA059: Quest II Walsh Aventura II, N8180Q, Antioch, CA, December 26, 1999

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: December 26, 1999, 13:50 local (21:50 UTC)
- Place: Antioch, CA
- Coordinates: 37.989067, -121.81089 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.9891&lon=-121.8109&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report December 14, 2001
- Report: Approved by Office Director
- NTSB case key (mKey): 48418
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX00LA059
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/48418/pdf
- Page: https://openairdocs.org/ntsb/LAX00LA059

## Probable cause

The pilot's inattention to the fact that he had failed to retract the landing gear wheels prior to performing a water landing.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Nose over, landing - flare/touchdown
  - terrain condition - water
  - in-flight planning/decision - inattentive, pilot in command (cause)
  - gear retraction - not performed, pilot in command (cause)

## Analysis

The pilot took off in the amphibious airplane from an asphalt runway, and then he flew to a lake.  The pilot indicated that during the landing approach he forgot to retract the landing gear wheels.  Upon touchdown in the water, the airplane nosed over.

## Factual narrative

On December 26, 1999, about 1350 hours Pacific standard time, an experimental Quest II Walsh Ltd., Aventura II, N8180Q, operated by the pilot, nosed over during landing in a lake about 10 miles northeast of Antioch, California.  Visual meteorological conditions prevailed at the time of the personal flight, which was being performed under the provisions of 14 CFR Part 91.  The airplane was substantially damaged.  The private pilot and passenger sustained minor injuries.  The flight originated from Byron, California, about 1325.

The pilot indicated to the National Transportation Safety Board investigator that he took off in the amphibious airplane from an asphalt runway at Byron, and then he flew to a lake near Antioch.  The pilot stated that during the landing approach he forgot to retract the landing gear wheels.  Upon touchdown, the airplane nosed over.  The pilot also indicated that no mechanical malfunctions were experienced with the airplane during his flight.

## Aircraft

- Registration: [N8180Q](https://openairdocs.org/aircraft/N8180Q), registered now, S/N AP2A0052, built 1998 (OpenAirDocs)
- Reported make and model: Quest II Walsh Ltd. AVENTURA II (AVENTURA I)
- Registry model: [Quest II Walsh AVENTURA II](https://openairdocs.org/model/quest-ii-walsh-aventura-ii) (registry code 05606FX) (OpenAirDocs)
- Registry engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: AP2A0052
- Airframe hours: 140
- Engines: Rotax 912 80 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Raymond W. Shipway
- Registered owner: Quest II Walsh Ltd
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, November 27, 1999, 10 hours before
- Departed: C83, BYRON, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 150 total, 60 in the last 90 days, 2 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 3 knots
- Visibility: 3 statute miles
- Lowest ceiling: none
- Temperature: 142 °F, dew point 102 °F
- Altimeter: 30.00 inHg
- Observed at: SCK, 20 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 19991226037109A](https://openairdocs.org/incident/19991226037109A), Dec 26, 1999: Amtr AVENTURAII, Antioch, CA, Substantial damage. (.19) On December 26, 1999, about 1404 hours pacific standard time, an experimental quest ii walsh ltd., aventura ii, N8180Q, operated by the pilot, nosed over…

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.

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