# NTSB SEA04CA140: Aviat A-1B, N991C, Driggs, ID, July 24, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: July 24, 2004, 11:30 local (17:30 UTC) - Place: Driggs, ID - Coordinates: 43.742221, -111.101112 - Nearby events: https://openairdocs.org/map.md?lat=43.7422&lon=-111.1011&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report October 28, 2004 - Report: Approved by Office Director - NTSB case key (mKey): 59728 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA04CA140 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59728/pdf - Page: https://openairdocs.org/ntsb/SEA04CA140 ## Probable cause The pilot's improper recovery from a bounced landing which resulted in a loss of control and a nose over. A factor was the fence. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - flare/touchdown - recovery from bounced landing - improper, pilot in command (cause) - porpoise/pilot-induced oscillation - encountered, pilot in command - Loss of control - on ground/water, landing - roll - On ground/water collision with object - object - fence - Nose over, landing - roll ## Analysis While attempting to land on the grass strip that borders Runway 21, the airplane bounced 5 or 6 times. The pilot attempted a go-around by adding full power; however, the airplane yawed right between 30 and 40 degrees before impacting a fence and nosing over. The rudder and both wings sustained substantial damage. ## Factual narrative On July 24, 2004, approximately 1130 mountain daylight time, an AVIAT A-1B single-engine airplane, N991C, was substantially damaged following a loss of control while landing at the Driggs-Reed Memorial Airport (U59), Driggs, Idaho. The airplane was registered to a private individual. The commercial pilot, sole occupant of the airplane, was not injured. Visual meteorological conditions prevailed for the 14 CFR Part 91 personal flight, and a flight plan was not filed. The aircraft had departed U59 at 0900. According to the Pilot/Operator Aircraft Accident Report (NTSB form 6120.1/2), the pilot reported that he was attempting to land on the parallel grass strip to the right of Runway 21. The pilot stated that after touching down the aircraft bounced about 5 or 6 times. The pilot further stated that after applying full power and initiating a go-around the airplane yawed to the right about 30 to 40 degrees, subsequently impacting a fence and nosing over. Post accident examination of the aircraft revealed that both propeller blades were bent, the rudder was bent, and both wings were substantially damaged. At 1050, the weather reporting facility located at the Jackson Hole Airport (JAC), Jackson Hole, Wyoming, located 18 nautical miles southeast of the accident site reported wind 130 degrees at 4 knots, visibility 10 statute miles, sky clear, temperature 17 degrees C, dew point 6 degrees C, and an altimeter setting of 30.38 inches of Mercury. ## Aircraft - Registration: [N991C](https://openairdocs.org/aircraft/N991C), registered now, S/N 2125, built 2000 (OpenAirDocs) - Reported make and model: Aviat A-1B - Registry model: [Aviat A-1B](https://openairdocs.org/model/aviat-a-1b) (registry code 2210406) (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: 2125 - Engines: Lycoming O-360 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Gary E. Matton - Registered owner: Gary E. Mattox - Airworthiness certificate: Standard, Normal - Departed: U59, Driggs, ID - Destination: U59, Driggs, ID ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 64; commercial; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2; flight hours: 4,600 total, 85 in this make and model, 50 in the last 90 days ## Weather - Conditions: Visual (VMC), Day ## 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 20040724016169A](https://openairdocs.org/incident/20040724016169A), Jul 24, 2004: Aviat A1B, Driggs, ID, Substantial damage. (-23) Pilot was attempting to land on the grass strip between runway 21 and taxiway at the Driggs, Idaho airport. After touchdown, the aircraft bounced five to… 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.