# NTSB DEN04LA065: Mooney M20C, N6958V, Clovis, NM, March 13, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 12, 2004, 21:20 local (Mar 13, 2004, 04:20 UTC) - Place: Clovis, NM - Coordinates: 34.379352, -103.050422 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.3794&lon=-103.0504&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 29, 2004 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 59086 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN04LA065 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59086/pdf - Page: https://openairdocs.org/ntsb/DEN04LA065 ## Probable cause the pilot's improper in-flight planning and decision making during an instrument approach resulting in the pilot's intentional descent below approach minimums, and the pilot's failure to maintain obstacle clearance resulting in the in-flight collision with an object. Contributing factors include the dark night light conditions, and the wires. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight collision with object, approach - in-flight planning/decision - improper, pilot in command (cause) - decision height - continued below, pilot in command (contributing factor) - altitude/clearance - not maintained, pilot in command (cause) - missed approach - initiated, pilot in command - object - wire,transmission (contributing factor) - light condition - dark night (contributing factor) - weather condition - low ceiling ## Analysis According to the pilot, at 11,000 feet msl, while on a cross-country IMC flight, he encountered rime icing conditions. He requested, and was given, clearance to descend to 8,000 feet msl. He stated that he received the local weather conditions and decided to divert to a nearby airport. He stated that the airport weather conditions were reported as: ceiling, 100 feet; visibility, 4 miles; and wind, 165 degrees at 6 knots. After contacting the local approach control, he requested and received vectors for runway 04. He stated that, at approximately 4,400 feet msl, while established on the glide slope and localizer, he struck something, and all radio communication was lost. The pilot immediately initiated a missed approach. Approximately 1 hour later, he reestablished radio contact with the local approach control. Approach control gave him vectors to runway 22 at another nearby airport. He stated that he "broke out" of the clouds at approximately 200 to 300 feet agl, on a "45 degree" to runway 22. At 2230, he landed at without further incident. An examination of the airplane revealed several scratches along the bottom of the aft fuselage and empennage. These "braided" scratches were similar to scratches associated with contacting a power transmission line. Several areas on the bottom of the airplane exhibited burns and "arcing." The airplane received substantial damage to the aft fuselage bulkhead and lower tail cone assembly. ## Factual narrative On March 12, 2004, at approximately 2120 mountain standard time, a Mooney M20C, N6958V, was substantially damaged when it struck a power transmission line during final approach to Clovis Municipal Airport (CVN), Clovis, New Mexico. The private pilot, the sole occupant on board, was not injured. Instrument meteorological conditions prevailed. An instrument flight rules (IFR) flight plan was filed for this personal flight being conducted under the provisions of Title 14 CFR Part 91. The flight originated at Winslow, Arizona, at approximately 1800, and was en route to Ardmore, Oklahoma. According to the pilot, at 11,000 feet msl, at a point just west of Clovis, he encountered rime icing conditions. At approximately 2110, he requested, and was given, clearance to descend to 8,000 feet msl. He stated that after he received the local weather conditions, he decided to divert to CVN. He stated that the weather conditions at CVN were reported as, ceiling, 100 feet; visibility, 4 miles; and wind, 165 degrees at 6 knots. At approximately 2115, the pilot contacted Cannon Approach Control and requested vectors to CVN. He was given vectors for runway 04. The pilot stated that, at approximately 4,400 feet msl, while established on the glide slope and localizer, he struck something, and all radio communication was lost. At 2120, the pilot initiated a missed approach. The pilot stated that he flew around for 1 hour. At approximately 2220, Cannon Approach "came back on," however, radio communication was intermittent. At that time, while on a heading of 240 degrees, Cannon Approach gave him vectors to Cannon Air Force Base (CVS), which was 270 degrees from his position. After responding to Cannon Approach, by transponder indent, he was directed to runway 22 at CVS. He stated that he "broke out" of the clouds at approximately 200 to 300 feet agl, on a "45 degree" to runway 22. At 2230, he landed at CVS without further incident. An FAA inspector, who examined the airplane, stated that several scratches were located along the bottom of the aft fuselage and empennage. These "braided" scratches were similar to scratches associated with power transmission line contact. Several areas exhibited burns and "arcing." The wire strike resulted in substantial damage to the aft fuselage bulkhead and lower tail cone assembly. According to a member services representative from Farmers' Electric Cooperative, Inc., of New Mexico (FEC), on the evening of March 12, 2004, a customer, who lived near the Clovis Municipal Airport, called in to report a power outage that had occurred at approximately 2130 mst. An FEC lineman surveyed the area and located a blown line fuse. The line fuse was "refused" and power was restored at 2223. On March 15, 2004, after receiving reports that a low flying airplane had struck wires in the vicinity of the airport, another FEC lineman conducting a follow-up inspection, located a set of damaged power lines approximately 1/4 of a mile to the right of the runway centerline and approximately 1/4 of a mile south of the approach for runway 04. The lineman stated that it appeared the low flying airplane had struck the top phase, 14,000 volt, #2 ACSR conductor wire. The impact stretched the conductor wire, breaking the smaller stranded (braided) wires, but leaving the conductor wire intact. Although the conductor wire remained intact, the power outage was the result of a "direct short," caused by the top phase conductor wire's contact with another phase wire. At the point where the damage occurred, the top phase wire was approximately 27 feet, 3 inches, above the ground. ## Aircraft - Registration: [N6958V](https://openairdocs.org/aircraft/N6958V), registered now, S/N 20-1191, built 1976 (OpenAirDocs) - Reported make and model: Mooney M20C - Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 21-1191 - Airframe hours: 7000 - Engines: Lycoming 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: George W. Carlson - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 30, 2003, 50 hours before - Departed: INW, Windslow, AZ - Destination: 1F0, Ardmore, OK - Flight plan: IFR - Airport: CVN, Clovis Municipal ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; injuries: none; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; last flight review August 4, 2002; seat: left; flight hours: 1,750 total, 1,400 in this make and model ## Weather - Conditions: Instrument (IMC), Night/dark - Wind: 165° at 6 knots - Visibility: 4 statute miles - Lowest ceiling: 100 ft overcast - Temperature: 46 °F, dew point 46 °F - Altimeter: 30.02 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 20040312003339A](https://openairdocs.org/incident/20040312003339A), Mar 12, 2004: Mooney M20C, Clovis, NM, Minor damage. (-23) On March 12, 2004, at approximately 10:30 am PST, the pilot departed on an IFR flight from concord, California, to his home in ardmore, Oklahoma. The… ## Other investigations on N6958V (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 FTW95LA024](https://openairdocs.org/ntsb/FTW95LA024), Oct 21, 1994: Mooney M20C (N6958V), Greeley, CO, substantial damage. Probable cause: INADVERTENT LANDING GEAR RETRACTION BY THE PILOT FLYING THE AIRCRAFT. A FACTOR WAS INADEQUATE SUPERVISION BY THE FLIGHT INSTRUCTOR. 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.