# NTSB WPR16LA163: Cessna TR182, N756FZ, Torrance, CA, August 8, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: August 8, 2016, 15:08 local (22:08 UTC) - Place: Torrance, CA - Coordinates: 33.801109, -118.334999 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.8011&lon=-118.3350&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report March 5, 2018 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 93806 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR16LA163 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/93806/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=93806 - Page: https://openairdocs.org/ntsb/WPR16LA163 ## Probable cause The failure of the right main landing gear to fully extend for reasons that could not be determined because postaccident examination and testing did not reveal any evidence of preimpact mechanical failures or malfunctions that would have precluded normal operation. ## 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 TR182, 5 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=2072735), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) - [Landing gear system: main landing gear](https://openairdocs.org/ntsb-findings/01023210): Aircraft › Aircraft systems · Malfunction (probable cause); cases with it: [Cessna TR182, 1 case](https://openairdocs.org/ntsb-findings/01023210/cases.md?model=2072735), [All aircraft, 241 cases](https://openairdocs.org/ntsb-findings/01023210/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Cessna TR182, 10 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2072735), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Cessna TR182, 4 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072735), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis During an instructional flight, the flight instructor was demonstrating a normal landing to the pilot under instruction. As the airplane approached the runway, the instructor selected the landing gear down and configured the airplane for the landing. The landing checks were called out, and a landing gear green indictor light was verified, indicating that the landing gear should have been down and locked. The landing flare and initial touchdown were normal. However, shortly after the airplane touched down, it listed right as the right main landing gear (MLG) collapsed. The airplane then entered a 180o skidding turn before coming to a stop. Two witnesses reported seeing the airplane on final approach with its right MLG not fully extended. During a postaccident examination, the airplane was placed on jacks to facilitate a gear-swing test. The MLG were cycled multiple times with no evidence of any preimpact mechanical failures or malfunctions that would have precluded normal operation. Each time the MLG were extended, the landing gear indicator lights inside the cockpit illuminated. The reason for the right MLG's failure to fully extend when the MLG were selected down could not be determined. ## Factual narrative On August 8, 2016, at 1508 Pacific daylight time, a Cessna TR182, N756FZ, experienced a right main landing gear collapse after landing at Zamperini Field Airport (TOA), Torrance, California. The airplane was registered to M and S 182 LLC and operated by Pacific Skies Aviation under the provisions of 14 Code of Federal Regulations Part 91. The certified flight instructor and the commercial pilot undergoing instruction (PUI), were not injured. The airplane sustained substantial damage to the right horizontal stabilizer. The local instructional flight departed TOA about 1338. Visual meteorological conditions prevailed, and no flight plan had been filed. The flight instructor reported that he was demonstrating a normal landing to the PUI. As the flight approached the runway, he extended the landing gear and configured the airplane for a normal landing. The landing checks were called out and a green light was verified indicating that the landing gear was extended. The flare and initial touchdown were normal. Shortly after the airplane touched down, the airplane listed to the right. The airplane entered into a 180° skidding turn before coming to a stop. Two witnesses located at the airport reported seeing the airplane on final approach with its right main landing gear not fully extended. A Federal Aviation Administration inspector from the Long Beach Flight Standards District Office reported that when he arrived on site, he observed the airplane on the runway with the nose and left main landing gear down and locked. The right main landing gear was fully retracted. During the recovery process, the airplane was lifted and the right main landing gear freely fell into trail. A mechanic then manually placed the right side gear in the down and locked position. The airplane was lowered onto the landing gear and subsequently towed from the runway to a secured location. During a postaccident examination, the airplane was placed on jacks to facilitate a gear swing test. The landing gear was cycled multiple times with no anomiles noted. The landing gear indicator lights inside the cockpit illuminated during the landing gear extension. ## Aircraft - Registration: [N756FZ](https://openairdocs.org/aircraft/N756FZ), registered now, S/N R18201069 (OpenAirDocs) - Reported make and model: CESSNA TR182 (NO SERIES) - Registry model: [Cessna TR182](https://openairdocs.org/model/cessna-tr182) (registry code 2072735) (OpenAirDocs) - Category: Airplane - Serial number: R18201069 - Year built: 1979 - Airframe hours: 3730.8 - Engines: Lycoming O-540-L3C5D 235 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Pacific Skies Aviation LLC. - Registered owner: M and S 182 LLC. - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, July 15, 2016 - Departed: TOA, Torrance, CA - Destination: TOA, Torrance, CA - Airport: TOA, Zamperini Field, runway 11L, 5,001 × 150 ft, concrete - Equipment: Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 41; injuries: none; airline transport, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review July 12, 2016; seat: left; restraint: 3-point; flight hours: 9,000 total, 300 in this make and model, 8,700 as pilot in command, 150 in the last 90 days, 50 in the last 30 days, 2 in the last 24 hours - Pilot; age 20; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review April 15, 2016; seat: right; restraint: 3-point; flight hours: 315.7 total, 127.4 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 64 °F - Altimeter: 29.80 inHg - Observed at: KTOA ## 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 20160808017759A](https://openairdocs.org/incident/20160808017759A), Aug 8, 2016: Cessna TR182, Torrance, CA, Substantial damage. Pilot reported that he had a green light indicating gear down and locked before landing. The right main landing gear colapsed upon landing. Ground witnesses… ## Docket (9 files) The files NTSB released with the investigation on January 5, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=93806. 5.2 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459165&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - CFI Statement- Birjandi (item 2, .PDF, 175 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459166&FileExtension=.PDF&FileName=CFI%20Statement-%20Birjandi-Master.PDF - Student Pilot Statement (item 3, .PDF, 67 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459167&FileExtension=.PDF&FileName=Student%20Pilot%20Statement-Master.PDF - Witness Statement- Lyons (item 4, .PDF, 15 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459168&FileExtension=.PDF&FileName=Witness%20Statement-%20Lyons-Master.PDF - Witness Statement_Mendez (item 5, .PDF, 236 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459169&FileExtension=.PDF&FileName=Witness%20Statement_Mendez-Master.PDF - NTSB Statement of Investigation (item 6, .PDF, 176 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459170&FileExtension=.PDF&FileName=NTSB%20Statement%20of%20Investigation-Master.PDF - FAA Inspector Statement (item 7, .PDF, 252 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459171&FileExtension=.PDF&FileName=FAA%20Inspector%20Statement-Master.PDF - Release of Aircraft Wreckage, NTSB Form 6120.15 (item 8, .PDF, 215 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459172&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Master.PDF - Accident Photo (item 9, .PDF, 354 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459173&FileExtension=.PDF&FileName=Accident%20Photo-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.