# NTSB CEN11FA274: Beech A36, N24192, Monaville, TX, April 7, 2011 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Field investigation · Final report - Date: April 7, 2011, 12:27 local (17:27 UTC) - Place: Monaville, TX - Coordinates: 29.950834, -96.038887 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=29.9508&lon=-96.0389&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Defining event: [Enroute-descent: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report October 3, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: Continental Motors Inc., FAA-Houston FSDO - NTSB case key (mKey): 78807 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11FA274 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78807/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78807 - Page: https://openairdocs.org/ntsb/CEN11FA274 ## Probable cause A total loss of engine power for undetermined reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Engine (reciprocating)](https://openairdocs.org/ntsb-findings/01058500): Aircraft › Aircraft power plant · Not specified (probable cause); cases with it: [Beech A36, 13 cases](https://openairdocs.org/ntsb-findings/01058500/cases.md?model=1151604), [All aircraft, 497 cases](https://openairdocs.org/ntsb-findings/01058500/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Beech A36, 23 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=1151604), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Enroute-descent: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Beech A36, 56 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=1151604), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Beech A36, 47 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=1151604), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Beech A36, 12 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=1151604), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot reported that the engine intermittently lost power after he leveled the airplane at 3,000 feet mean sea level. The pilot moved the engine mixture to full rich and switched the fuel selector from the left tank to the right tank. The engine regained power momentarily but then began to hesitate again. The pilot activated the fuel boost pump, at which time the engine lost power completely. Further efforts to restore engine power were unsuccessful and the pilot executed a forced landing to an open field. A postaccident engine test run was conducted, during which the engine and propeller governor operated normally. No preimpact anomalies were found with the airplane. ## Factual narrative On April 7, 2011, at 1227 central daylight time, a Beech A36 Bonanza, N24192, lost engine power during an en route descent, which resulted in a forced landing near Monaville, Texas. The pilot was not injured; however, the passenger sustained minor injuries. The airplane received substantial damage. The airplane was registered to and operated by the pilot, as a co-owner, under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed at the accident site. The flight was operated on an instrument flight rules (IFR) flight plan, and originated from Lakeway Airport (3R9), Austin, Texas, about 1130. The pilot stated that the engine experienced an intermittent loss of power after the airplane leveled at 3,000 feet mean sea level (msl). He moved the engine mixture to full rich, and switched the fuel selector from the left tank to the right tank. The engine regained power momentarily, but then began to hesitate again. The pilot activated the fuel boost pump, at which time the engine lost power completely. Further efforts to restore engine power were unsuccessful. He subsequently executed a forced landing to an open field. A postaccident inspection revealed substantial damage to the right wing at the root, adjacent to the fuselage. The nose landing gear collapsed, and the engine exhaust assembly was deformed. Two blades of the 3-bladed propeller assembly were bent aft over the length of the blades. The engine itself appeared undamaged. The wings were removed to facilitate recovery. An engine test run was conducted under the direct supervision of the NTSB. The propeller was replaced and the engine exhaust assembly was repaired prior to the test run. Fuel was provided at the left wing fuel inlet. The engine was started using the airplane electrical system. After a few minutes at idle, the engine speed was increased to 1,700 rpm. A magneto check was conducted with a 50 rpm drop observed on each magneto. At full throttle, the engine ran at 2,700 rpm and 29 inches manifold pressure. Engine and propeller governor operation appeared normal. Maintenance records indicate that the engine was overhauled in October 2007. The most recent inspection was completed on August 13, 2010. According to the maintenance and engine test run records, about 120 hours had accumulated since the overhaul and approximately 30 hours had accumulated since the most recent inspection. ## Aircraft - Registration: [N24192](https://openairdocs.org/aircraft/N24192), registered now, S/N E-1223, built 1978 (OpenAirDocs) - Reported make and model: BEECH A36 - Registry model: [Beech A36](https://openairdocs.org/model/beech-a36) (registry code 1151604) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: E-1223 - Airframe hours: 3145 - Engines: CONT MOTOR IO 520 SERIES 285 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, August 13, 2010, 30 hours before - Departed: 3R9, Lakeway, TX - Destination: SGR, Sugar Land, TX - Flight plan: IFR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: single-engine sea, multi-engine land, single-engine land; medical: class 3, without waivers/limitations; last flight review September 21, 2010; seat: left; flight hours: 1,520 total, 24 in this make and model, 1,440 as pilot in command, 24 in the last 90 days, 12 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 15 knots, gusting 22 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 66 °F - Altimeter: 29.87 inHg - Observed at: SGR, 28 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 20110407005589A](https://openairdocs.org/incident/20110407005589A), Apr 7, 2011: Beech A36, Monaville, TX, Substantial damage. Pilot was on an IFR flight plan enroute from lakeway, TX. (3R9) to sugarland, TX. (Sgr) on 04/07/2007 at approximately 12:00 local time when given instructions… ## Docket (4 files) The files NTSB released with the investigation on August 17, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78807. 872 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 213 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40352016&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Engine Run Data Sheet (item 2, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40352017&FileExtension=.PDF&FileName=Engine%20Run%20Data%20Sheet-Master.PDF - Engine Logbook -- Excerpt (item 3, .PDF, 548 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40352082&FileExtension=.PDF&FileName=Engine%20Logbook%20--%20Excerpt-Redacted.PDF - Statement of Party Representatives to NTSB Investigation (item 4, .PDF, 75 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40352075&FileExtension=.PDF&FileName=Statement%20of%20Party%20Representatives%20to%20NTSB%20Investigation-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.