# NTSB ERA17LA150: Cessna 310R, N1362G, South Lakeland, FL, April 8, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 8, 2017, 11:45 local (15:45 UTC) - Place: South Lakeland, FL - Coordinates: 27.988889, -82.018608 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=27.9889&lon=-82.0186&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report April 4, 2019 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 94976 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA17LA150 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/94976/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=94976 - Page: https://openairdocs.org/ntsb/ERA17LA150 ## Probable cause The failure of the left main landing gear on landing for reasons that could not be determined due to the extent of damage sustained during the accident. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Cessna 310R, 4 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=2074245), [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. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Cessna 310R, 2 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2074245), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Cessna 310R, 8 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2074245), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The commercial pilot stated that he confirmed that the landing gear were down and locked before landing. After a smooth landing, the left wing began to sink. The pilot shut off the left engine, and the airplane veered left off the runway onto grass. The pilot then shut off the right engine. The left wing, left horizontal stabilizer, and left propeller assembly were substantially damaged. Examination of the left main landing gear (MLG) revealed that the fork bolt was ripped out of the torque tube, which damaged the tube and precluded a gear retraction test. Visual examination of the left MLG revealed that the overcentering tension on the down-lock assembly appeared to be rigged incorrectly; however, it could not be determined if the misrigging led to the failure of the left MLG. A review of the airframe maintenance logbooks revealed no recent maintenance to the MLG assembly. Based on the available evidence, the reason for the left MLG collapse could not be determined. ## Factual narrative On April 8, 2017, about 1145 eastern daylight time, a Cessna 310R, N1362G, sustained substantial damage when the left main landing gear collapsed during landing at Lakeland Linder Regional Airport (LAL), Lakeland, Florida. The commercial pilot and passenger were not injured. The airplane sustained substantial damage. The airplane was registered to and operated by the pilot as a 14 Code of Federal Regulations Part 91 personal flight. Visual meteorological conditions were reported at the airport at the time of the accident and no flight plan was filed. The flight originated from North Perry Airport (HWO), Hollywood, Florida, about 1040 and was destined for LAL.The pilot stated that he confirmed the landing gear was down and locked prior to landing. He said he landed "perfectly" but as the airplane rolled down the runway, the left wing began to sink. The pilot shut off the left engine, and the airplane veered to the left off the runway onto the grass. The pilot then shut off the right engine. When the airplane came to a stop, the pilot secured the airplane and he and his passenger exited. The left wing, and left horizontal stabilizer, and left propeller assembly were substantially damaged. Examination of the left main landing gear revealed that the fork bolt was ripped out of the landing gear torque tube damaging the torque tube. As a result, the gear could not be retracted and tested to fully determine how the landing gear failed. However, visual examination of the landing gear revealed the over-centering tension on the down lock assembly did not appear to be rigged correctly. A review of the airframe maintenance logbooks revealed the last annual inspection was conducted on July 12, 2016, at a total time of 7,714.2 hours. The airplane accrued a total of 7,794 hours at the time of the accident. At that time, the landing gear was retracted, and a test of the emergency extension system was found satisfactory. No specific maintenance to the main landing gear system itself was identified then or during the annual inspection in 2015. The pilot held a commercial pilot certificate with ratings for airplane single and multiengine land, and instrument airplane. His last Federal Aviation Administration first-class medical certificate was issued on September 19, 2016. At that time, he reported a total of 4,550 flight hours. The weather conditions reported at LAL, at 1150, included wind 010° at 4 knots, visibility 10 miles, and clear skies. ## Aircraft - Registration: [N1362G](https://openairdocs.org/deregistered/N1362G-2019-09-06), registration cancelled 2019-09-06, S/N 310R0717, built 1976 (OpenAirDocs) - Reported make and model: CESSNA 310R (R) - Registry model: [Cessna 310R](https://openairdocs.org/model/cessna-310r) (registry code 2074245) (OpenAirDocs) - Category: Airplane - Serial number: 310R0717 - Year built: 1976 - Airframe hours: 7794 - Engines: CMI IO 520 M1B 285 horsepower reciprocating; CMI IO 520 M1B 285 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 12, 2016 - Departed: HWO, HOLLYWOOD, FL - Destination: LAL, South Lakeland, FL - Airport: LAL, Lakeland Linder Rgnl, runway 27, 8,499 × 150 ft, asphalt - Equipment: Unknown ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 68; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; seat: left; restraint: 3-point; flight hours: 4,650 total, 140 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 10° at 4 knots - Visibility: 10 statute miles - Temperature: 70 °F, dew point 30 °F - Altimeter: 30.13 inHg - Observed at: LAL ## 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 20170408003599A](https://openairdocs.org/incident/20170408003599A), Apr 8, 2017: Cessna 310R, Lakeland, FL, Substantial damage. Pilot landed, rolled approx. 80 yards when l/h main landing gear collapsed. The l/h prop hit the ground and aircraft skidded off runway into grass area. ## Docket (4 files) The files NTSB released with the investigation on December 10, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=94976. 8.7 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 595 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469151&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Statements from FAA and A&P Mechanic (item 2, .PDF, 4.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469152&FileExtension=.PDF&FileName=Statements%20from%20FAA%20and%20A%26P%20Mechanic-Master.PDF - Photos (item 3, .PDF, 3 photos, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469153&FileExtension=.PDF&FileName=Photos-Master.PDF - Maintenance Logbook (item 4, .PDF, 3.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469154&FileExtension=.PDF&FileName=Maintenance%20Logbook-Master.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.