# NTSB FTW00LA051: Cessna 210, N6561X, Bulverde, TX, December 21, 1999 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: December 21, 1999, 15:45 local (21:45 UTC) - Place: Bulverde, TX - Coordinates: 29.770963, -98.449882 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=29.7710&lon=-98.4499&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 2 serious - Status: Completed, report November 2, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 48361 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW00LA051 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/48361/pdf - Page: https://openairdocs.org/ntsb/FTW00LA051 ## Probable cause The total loss of engine power for an undetermined reason. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, approach - vfr pattern - final approach - powerplant - failure,total (cause) - reason for occurrence undetermined (cause) - In flight collision with object, emergency descent/landing - object - tree(s) - In flight collision with terrain/water, descent - uncontrolled ## Analysis During the final approach, the airplane struck trees and terrain following a total loss of engine power. The local maintenance test flight was performed following the annual inspection with an overhaul of the engine cylinders. During a post-accident engine ground run at maximum power, no anomalies were found that would have precluded in-flight operation of the engine. Continuity was confirmed at all ignition switch positions. The fuel selector valve was selected on the right tank. When air pressure was applied to the right fuel line at the right wing root, a stream of blue colored fuel was observed as it was ejected from the engine pump inlet line. Both auxiliary tank transfer pumps activated when electrical power was applied. No open discrepancies were found in the maintenance records. ## Factual narrative On December 21, 1999, at 1545 central standard time, a Cessna 210, single-engine airplane, N6561X, impacted trees and terrain following a total loss of engine power near Bulverde, Texas. The airplane was owned by a private individual dba Lonesome Dove Aviation, Inc, of Carson City, Nevada, and operated under 14 Code of Federal Regulations Part 91. The private pilot and the pilot rated passenger received serious injuries, and the airplane sustained substantial damage. Visual meteorological conditions prevailed, and a flight plan was not filed for the local maintenance test flight. The time of departure was approximately 1500. During a telephone interview, conducted by the NTSB investigator-in-charge (IIC), and on the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), the pilot reported that the airplane had undergone an annual inspection with an overhaul of the engine cylinders. During final approach at "approximately 500 feet agl and 1/4 mile from the intended runway, the engine suddenly and totally lost power." The pilot reported that the aircraft "cleared a ridge, a dry creek bed, and after the right wing contacted a tree, [the airplane] came to rest inverted." Local authorities reported to the FAA inspector responding to the site that the airplane landed approximately 1000 yards south of the pilot's private airstrip. The FAA inspector found the right wing approximately 20 feet agl in a tree. The cockpit came to rest inverted. The tail section was found separated aft of the baggage compartment and resting upright on the bottom of the fuselage. The aircraft was released for recovery to Air Salvage of Dallas (ASOD), Lancaster, Texas, for further examination. On January 11, 2000, under the surveillance of the IIC, the Continental IO-470-E engine, serial number 7759-0-F, was started and run for 15 minutes with maximum power of 2500 rpm at 28 inches manifold pressure observed. Magneto drops were 110 rpm's (left) and 75 rpm's (right). Following the engine run, a differential cylinder compression check confirmed compression for all cylinders. The cockpit ignition switch was examined. Continuity was confirmed at each switch position (OFF, LEFT, RIGHT, BOTH). The fuel selector valve was found selected on the right tank and was jammed in that position. Air pressure was applied to the right fuel line at the right wing root and a stream of blue colored fuel was observed as it was ejected from the engine pump inlet line. Each wing was equipped with a Monarch Auxillary fuel tank. When electrical power was applied to the auxillary tank transfer pumps, both pumps activated. Maintenance records were reviewed by the IIC. No open discrepancies were found. The aircraft and all records were released to the owner's representative on January 11, 2000. ## Aircraft - Registration: [N6561X](https://openairdocs.org/deregistered/N6561X-2002-03-18), registration cancelled 2002-03-18, S/N 57561, built 1961 (OpenAirDocs) - Reported make and model: Cessna 210 - Registry model: [Cessna 210](https://openairdocs.org/model/cessna-210) (registry code 2073402) (OpenAirDocs) - Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 57561 - Airframe hours: 3967 - Engines: Continental IO-470-E 260 horsepower reciprocating - Damage: Substantial damage - Flight: Part 91 - Operator: Lonesome Dove Aviation, Inc. - Registered owner: Jack Mozley - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, October 20, 1999, 1 hours before - Airport: NONE, Monahan Airfield, runway 35, 2,300 × 100 ft, grass/turf ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 62; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 5,517 total, 150 in this make and model, 5,490 as pilot in command, 75 in the last 90 days, 20 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 360° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F - Altimeter: 29.00 inHg ## 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 19991221041829A](https://openairdocs.org/incident/19991221041829A), Dec 21, 1999: Cessna 210, Bulverde, TX, Substantial damage. (.4)During the final approach, the airplane struck trees and terrain following a total loss of engine power. The local maintenance test flight was performed… 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.