# NTSB DEN07LA156: Cessna 402B, N402BF, Hobbs, NM, September 10, 2007 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 10, 2007, 08:38 local (14:38 UTC) - Place: Hobbs, NM - Coordinates: 32.729743, -103.159446 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=32.7297&lon=-103.1594&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report December 20, 2007 - Report: Approved by Office Director - Parties: FAA - Lubbock FSDO - NTSB case key (mKey): 66637 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN07LA156 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/66637/pdf - Page: https://openairdocs.org/ntsb/DEN07LA156 ## Probable cause The failure of the left main landing gear down lock due to overload causing the main landing gear to collapse. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Main gear collapsed, landing - roll - landing gear,gear locking mechanism - fractured (cause) - On ground/water collision with object, landing - roll - object - airport sign/marker - On ground/water encounter with terrain/water, landing - roll - terrain condition - ground ## Analysis The pilot reported that on approach he put the landing gear handle down and the left main landing gear down indicator light failed to illuminate. The pilot notified the air traffic control tower and executed a go-around. The pilot then raised the landing gear handle and lowered it again with the same result. During final approach the pilot reduced power on the engines to check the gear unsafe audible warning. The warning did not sound and the pilot elected to land the airplane with the unsafe gear indication. The pilot requested that tower controllers confirm that the landing gear was down. The controllers informed the pilot that the gear appeared to be down. On landing, the left main landing gear collapsed. The airplane departed the side of the runway and struck a taxiway sign, resulting in substantial damage. ## Factual narrative On September 10, 2007, at 0838 mountain daylight time, a Cessna 402B, N402BF, operated by Aero Charters and Transports, was substantially damaged during the landing at the Lea County Regional Airport (HOB), Hobbs, New Mexico. Visual meteorological conditions prevailed at the time of the accident. The non-scheduled domestic cargo flight was being operated on an instrument flight rules flight plan under the provisions of Title 14 Code of Federal Regulations Part 135. The airline transport pilot was not injured. The flight originated at Roswell International Air Center, Roswell, New Mexico, at 0800. The pilot reported that on approach into HOB, he put the landing gear handle down and the left main landing gear indicator light failed to illuminate. The pilot notified the air traffic control tower and executed a go around. The pilot then raised the landing gear handle and lowered it again with the same result. During final approach the pilot reduced power on the engines to check the gear unsafe audible warning. The warning did not sound and the pilot elected to land the airplane with the unsafe gear indication. The pilot requested that tower controllers confirm that the landing gear was down. The controllers informed the pilot that the gear appeared to be down. On landing, the left main landing gear collapsed. The airplane departed the side of the runway and struck a taxiway sign, coming to rest approximately 1,800 feet from the approach end of the runway. An examination of the airplane by the Federal Aviation Administration revealed the left wing forward and rear spars were damaged, the left wing leading edge was dented about mid wing and outboard, the left horizontal stabilizer and spar were damaged, and the right wing main spar was damaged. The examination also showed that the left main landing gear down lock was broken. The down lock was retained for further examination by the National Transportation Safety Board's Materials Lab. Examination of the fracture surfaces on the down lock were clean and exhibited signs consistent with an overload event. An examination of the remaining airplane systems, by the FAA, revealed no anomalies. ## Aircraft - Registration: [N402BF](https://openairdocs.org/deregistered/N402BF-2009-08-24), registration cancelled 2009-08-24, S/N 402B-1076, built 1976 (OpenAirDocs) - Reported make and model: Cessna 402B - Registry model: [Cessna 402B](https://openairdocs.org/model/cessna-402b) (registry code 207590P) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 402B-1076 - Airframe hours: 10616 - Engines: Teledyne Continental TSIO-520EB 300 horsepower reciprocating; Teledyne Continental TSIO-520EB 300 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: Aero Charter and Transport, doing business as Aero Charter and Transportation, Inc. - Registered owner: D+A Investments LLC - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, August 1, 2007 - Departed: ROW, Roswell, NM - Destination: HOB, Hobbs, NM - Flight plan: IFR - Airport: HOB, Lea County Regional Airport, runway 03, 7,398 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 49; injuries: none; airline transport, flight engineer, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review July 1, 2007; seat: left; flight hours: 9,000 total, 2,500 in this make and model, 8,000 as pilot in command, 220 in the last 90 days, 60 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 60° at 6 knots - Visibility: 6 statute miles - Lowest ceiling: 1,100 ft overcast - Temperature: 66 °F - Altimeter: 30.18 inHg - Observed at: KHOB ## 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 20070910019549A](https://openairdocs.org/incident/20070910019549A), Sep 10, 2007: Cessna 402B, Hobbs, NM, Substantial damage. (-23) On September 10, 2007, at approximately 0938 MDT, N402BF, a Cessna model CE-402B, was on short final for runway 13 at Lea County Regional Airport (khob)… 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.