# NTSB CHI06CA125: Bangham Barracuda, N91LB, Monett, MO, May 5, 2006 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 4, 2006, 19:30 local (May 5, 2006, 00:30 UTC) - Place: Monett, MO - Coordinates: 36.906112, -94.012779 - Nearby events: https://openairdocs.org/map.md?lat=36.9061&lon=-94.0128&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report August 29, 2006 - Report: Approved by Office Director - Parties: FAA-Kansas City FSDO - NTSB case key (mKey): 63791 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI06CA125 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/63791/pdf - Page: https://openairdocs.org/ntsb/CHI06CA125 ## Probable cause Rupture of the hydraulic hose and deformation of the hydraulic cylinder piston rods for undetermined reasons, which resulted in a failure of the landing gear extension system. Contributing factors were the pilot's premature shutdown of the engine on short final, the resulting inability to maintain a proper glidepath to the runway, and the unsuitable terrain adjacent to the runway resulting in collapse of the right main landing gear. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, cruise - hydraulic system,line - ruptured (cause) - landing gear,normal retraction/extension assembly - failure,partial (cause) - Gear collapsed, emergency landing - engine shutdown - premature, pilot in command (contributing factor) - proper glidepath - not maintained, pilot in command (contributing factor) - unsuitable terrain or takeoff/landing/taxi area - encountered, pilot in command (contributing factor) ## Analysis The airplane was substantially damaged when the landing gear failed to extend properly and the pilot executed an emergency landing. The pilot reported he heard a "pop" and smelled hydraulic fluid during cruise flight. He attempted to lower the landing gear, however, only the right main gear extended properly. The nose gear and left main gear remained retracted. Use of the emergency landing gear extension system was not successful. The pilot set up for an emergency landing and elected to secure the engine while on short final. He stated that with the resulting loss of engine power, the airplane "dropped out of the sky" and subsequently landed short of the runway. The extended right main landing gear collapsed. A post accident inspection revealed that a hydraulic line on the firewall had ruptured. In addition, the piston rod within both the nose and left main landing gear extension cylinders was bent preventing free movement. The landing gear system utilized hydraulic pressure to raise and hold the gear in the retracted position. No up-locks were installed. ## Factual narrative On May 4, 2006, about 1930 central daylight time, an amateur-built Bangham Barracuda, N91LB, piloted by a private pilot, was substantially damaged during an emergency landing at Monett Municipal Airport (M58), Monett, Missouri. The personal flight was being conducted under 14 CFR Part 91 without a flight plan. The pilot and passenger were not injured. The local flight departed Aurora Municipal Airport (2H2), Aurora, Missouri, about 1820. The pilot reported that approximately 8 minutes after takeoff, while conducting a series of climbs and descents, he heard a "pop" and smelled hydraulic fluid. He noted that the landing gear in-transit light illuminated. He selected gear down, however, only the right main landing gear extended properly. The nose gear and left main gear remained retracted. Use of the emergency landing gear extension system was not successful. The pilot set up for an emergency landing. On short final he reduced power in order to secure the engine prior to touchdown. He stated that with the power reduction the airplane "dropped out of the sky." The airplane subsequently landed on a grass area short of the runway and slid approximately 120 feet before coming to rest. During this time, the extended right main landing gear collapsed. A post accident inspection revealed that a hydraulic line on the firewall had ruptured. During follow-up testing, the hydraulic pressure switch and emergency gear extension valve both operated properly. The piston rod within both the nose and left main landing gear extension cylinders was bent preventing free movement. According to the pilot, the landing gear system utilized hydraulic pressure to raise and hold the gear in the retracted position. No up-locks were installed. Emergency gear extension was normally accomplished with the assistance of gravity when hydraulic pressure was released by actuating the emergency extension valve. The pilot reported that because of the electrical installation of the landing gear limit switch and the hydraulic pressure switch, it may have been possible for the hydraulic pump to be energized regardless of system pressure. In that situation, the pressure switch would not protect the hydraulic system allowing it to become over-pressurized. ## Aircraft - Registration: [N91LB](https://openairdocs.org/deregistered/N91LB-2012-12-18), registration cancelled 2012-12-18, S/N 1, built 1986 (OpenAirDocs) - Reported make and model: Bangham Barracuda - Registry model: [Bangham Morris L BARRACUDA](https://openairdocs.org/model/bangham-morris-l-barracuda) (registry code 05613QK) (OpenAirDocs) - Registry engine: [Lycoming IO-540 series](https://openairdocs.org/engine/lycoming-io-540-series) (registry code 41530, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 1 - Airframe hours: 2198 - Engines: Lycoming IO-540-C4B5 250 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, July 1, 2005 - Departed: 2H2, Aurora, MO - Destination: M58, Monett, MO - Airport: M58, Monett Muni, runway 36, 5,000 × 75 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 47; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review July 1, 2005; flight hours: 486 total, 28 in this make and model, 466 as pilot in command, 9 in the last 90 days, 6 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 70° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 57 °F, dew point 50 °F - Altimeter: 30.03 inHg - Observed at: JLN, 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 20060504008149A](https://openairdocs.org/incident/20060504008149A), May 4, 2006: Amtr BARRACUDA, Monett, MO, Substantial damage. (-23) The pilot was attempting to land with the right main landing gear extended and the left main and nose gears retracted because of a landing gear system… 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.