# NTSB WPR10LA242: Grumman AA-5A, N26414, Monument, OR, May 15, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 14, 2010, 18:15 local (May 15, 2010, 01:15 UTC) - Place: Monument, OR - Coordinates: 44.831943, -119.430274 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.8319&lon=-119.4303&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report July 22, 2010 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration FSDO - NTSB case key (mKey): 76014 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10LA242 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76014/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76014 - Page: https://openairdocs.org/ntsb/WPR10LA242 ## Probable cause The pilot’s misjudged flare during landing resulting in a hard landing and loss of directional control. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: landing flare](https://openairdocs.org/ntsb-findings/01062041): Aircraft › Aircraft oper/perf/capability · Incorrect use/operation (probable cause); cases with it: [Grumman American Avn. AA-5A, 3 cases](https://openairdocs.org/ntsb-findings/01062041/cases.md?model=3960106), [All aircraft, 1,285 cases](https://openairdocs.org/ntsb-findings/01062041/cases.md) - [Object/animal/substance: tree(s)](https://openairdocs.org/ntsb-findings/03022020): Environmental issues › Physical environment · Effect on equipment; cases with it: [Grumman American Avn. AA-5A, 2 cases](https://openairdocs.org/ntsb-findings/03022020/cases.md?model=3960106), [All aircraft, 933 cases](https://openairdocs.org/ntsb-findings/03022020/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Grumman American Avn. AA-5A, 5 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=3960106), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/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: Hard landing](https://openairdocs.org/ntsb-events/092); cases with it: [Grumman American Avn. AA-5A, 2 cases](https://openairdocs.org/ntsb-events/092/sequence.md?model=3960106), [All aircraft, 2,102 cases](https://openairdocs.org/ntsb-events/092/sequence.md) - [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Grumman American Avn. AA-5A, 3 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=3960106), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Grumman American Avn. AA-5A, 12 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=3960106), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot reported that the airplane touched down hard at an angle near the approach end of the runway. After touchdown, the airplane veered to the right, departed the runway, and collided with 10-foot juniper trees. The pilot stated that the runway was sloped with a hump in the middle and a slight dogleg. He had previously landed downhill, but the local pilots recommended uphill. He thought that the different sight picture resulted in the early flare and subsequent hard landing. The pilot reported no mechanical failures or malfunctions with the airplane at the time of the accident. ## Factual narrative On May 14, 2010, about 1815 Pacific daylight time, a Grumman AA-5A, N26414, experienced a hard landing and veered off the runway at Monument Municipal Airport near Monument, Oregon. The owner/pilot was operating the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The certificated private pilot and one passenger were not injured. The airplane sustained substantial damage to the right wing spar and right aileron from impact forces. The cross-country personal flight departed Salem, Oregon, about 1645, with a planned destination of Monument. Visual meteorological conditions prevailed, and no flight plan had been filed. The pilot reported that the stall horn had sounded twice briefly during the approach to the runway, but he did not hear the stall warning horn after the flare. The pilot stated that the airplane just settled and touched down hard at an angle near the approach end of runway 32. The airplane then veered to the right, departed the runway, and collided with 10-foot juniper trees. The pilot stated that the runway was sloped with a hump in the middle and a slight dogleg. He had previously landed downhill, but the local pilots recommended landing uphill. He thought that the different sight picture resulted in an early flare. The pilot reported no mechanical failures or malfunctions with the airplane prior to the accident. ## Aircraft - Registration: [N26414](https://openairdocs.org/aircraft/N26414), registered now, S/N AA5A0578, built 1978 (OpenAirDocs) - Reported make and model: GRUMMAN AA-5A - Registry model: [Grumman American Avn. AA-5A](https://openairdocs.org/model/grumman-american-avn-aa-5a) (registry code 3960106) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: AA5A0578 - Airframe hours: 5323 - Engines: Lycoming O-320-E2G 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Salem Pilots Association - Registered owner: Salem Pilots Association - Airworthiness certificate: Standard, Normal - Last inspection: Annual, March 24, 2010, 34 hours before - Departed: SLE, Salem, OR - Destination: 12S, Monument, OR - Airport: 12S, Monument Municipal, runway 32, 2,104 × 29 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 63; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review March 9, 2009; seat: left; flight hours: 606 total, 268 in this make and model, 554 as pilot in command, 9 in the last 90 days, 2 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 320° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 79 °F, dew point 39 °F - Altimeter: 29.92 inHg - Observed at: KPDT, 55 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 20100514033969A](https://openairdocs.org/incident/20100514033969A), May 14, 2010: Grumman Ame AA-5A, Monument, OR, Substantial damage. Pilot was landing on runway 32, an uphill runway with approximately 100' elevation change from bottom to top. On touch down the pilot reported a hard landing… ## Other investigations on N26414 (1) 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 SEA96LA180](https://openairdocs.org/ntsb/SEA96LA180), Aug 6, 1996: Grumman American AA-5A (N26414), Klamath Falls, OR, substantial damage. Probable cause: the pilot's inadequate compensation for wind conditions, and his failure to maintain proper alignment with the runway during the landing/go-around. Factors relating to the accident were: strong,… ## Docket (1 files) The files NTSB released with the investigation on June 21, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76014. 506 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 506 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40330656&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.