# NTSB WPR10CA270: Beech C24R, N23995, Boise, ID, May 29, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 29, 2010, 15:05 local (21:05 UTC) - Place: Boise, ID - Coordinates: 43.564445, -116.222778 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.5644&lon=-116.2228&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Landing gear not configured](https://openairdocs.org/ntsb-events/095) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report October 21, 2010 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: FAA Boise FSDO - NTSB case key (mKey): 76161 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10CA270 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76161/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76161 - Page: https://openairdocs.org/ntsb/WPR10CA270 ## Probable cause The pilot's failure to properly configure the landing gear for landing and the flight instructor's inadequate supervision. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system](https://openairdocs.org/ntsb-findings/01023200): Aircraft › Aircraft systems · Not used/operated (probable cause); cases with it: [Beech C24R, 1 case](https://openairdocs.org/ntsb-findings/01023200/cases.md?model=1151254), [All aircraft, 113 cases](https://openairdocs.org/ntsb-findings/01023200/cases.md) - [Action: forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Beech C24R, 1 case](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=1151254), [All aircraft, 440 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md) - [Attention/monitoring: monitoring other person](https://openairdocs.org/ntsb-findings/02021535): Personnel issues › Psychological · Instructor/check pilot (probable cause); cases with it: [Beech C24R, 1 case](https://openairdocs.org/ntsb-findings/02021535/cases.md?model=1151254), [All aircraft, 200 cases](https://openairdocs.org/ntsb-findings/02021535/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach: Simulated/training event](https://openairdocs.org/ntsb-events/600); cases with it: [Beech C24R, 2 cases](https://openairdocs.org/ntsb-events/600/sequence.md?model=1151254), [All aircraft, 173 cases](https://openairdocs.org/ntsb-events/600/sequence.md) - [Landing-flare/touchdown: Landing gear not configured](https://openairdocs.org/ntsb-events/095) (defining event); cases with it: [Beech C24R, 3 cases](https://openairdocs.org/ntsb-events/095/sequence.md?model=1151254), [All aircraft, 584 cases](https://openairdocs.org/ntsb-events/095/sequence.md) ## Analysis The pilot receiving instruction and the certified flight instructor (CFI) reported that while attempting a simulated engine-out approach, the pilot failed to lower the airplane’s landing gear. During the landing flare the stall warning horn activated followed by the activation of the gear warning horn. The gear warning horn had not activated during the power-off approach. The CFI immediately took the controls and attempted to add full power, but the pilot's hand on the controls prevented him from achieving full throttle application. The CFI was only able to add approximately half power. The airplane subsequently landed in a gear-up configuration. The operator of the airplane indicated that there were no known mechanical malfunctions or failures with the airplane. The pilot stated that he had not specifically checked the gear warning horn on that flight, but it had been operating properly earlier that day. ## Factual narrative The pilot receiving instruction and the certified flight instructor (CFI) reported that while attempting a simulated engine-out approach, the pilot failed to lower the airplane’s landing gear. During the landing flare the stall warning horn activated followed by the activation of the gear warning horn. The gear warning horn had not activated during the power-off approach. The CFI immediately took the controls and attempted to add full power, but the pilot's hand on the controls prevented him from achieving full throttle application. The CFI was only able to add approximately half power. The airplane subsequently landed in a gear-up configuration. The operator of the airplane indicated that there were no known mechanical malfunctions or failures with the airplane. The pilot stated that he had not specifically checked the gear warning horn on that flight, but it had been operating properly earlier that day. ## Aircraft - Registration: [N23995](https://openairdocs.org/deregistered/N23995-2012-02-09), registration cancelled 2012-02-09, S/N MC-473, built 1977 (OpenAirDocs) - Reported make and model: BEECH C24R - Registry model: [Beech C24R](https://openairdocs.org/model/beech-c24r) (registry code 1151254) (OpenAirDocs) - Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: MC-473 - Airframe hours: 3505 - Engines: LYCOMING IO-360-A1B6 200 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: P-Factor LLC, doing business as Glass Cockpit Aviation - Registered owner: Jessen Aircraft LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 3, 2010 - Departed: KBOI, Boise, ID - Destination: KBOI, Boise, ID - Airport: KBOI, Boise, runway 28L, 9,736 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 34; injuries: none; private; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; seat: left; flight hours: 367 total, 11 in this make and model - Flight instructor; age 38; injuries: none; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; seat: right; flight hours: 550 total, 50 in this make and model, 518 as pilot in command, 100 in the last 90 days, 35 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 8 knots - Visibility: 10 statute miles - Temperature: 57 °F, dew point 36 °F - Altimeter: 30.19 inHg - Observed at: KBOI ## 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 20100529006109A](https://openairdocs.org/incident/20100529006109A), May 29, 2010: Beech C24R, Boise, ID, Minor damage. During an instructional flight, the CFI initiated a power-off short approach and failed to lower the landing gear. ## Docket (3 files) The files NTSB released with the investigation on July 14, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76161. 727 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 631 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40331564&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Phone Call: Pilot (item 2, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40331953&FileExtension=.PDF&FileName=Record%20of%20Phone%20Call%3A%20Pilot-Master.PDF - Record of Phone Call: CFI (item 3, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40332016&FileExtension=.PDF&FileName=Record%20of%20Phone%20Call%3A%20CFI-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.