# NTSB CEN11LA173: Cessna 402, N5802C, Albuquerque, NM, February 3, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: February 3, 2011, 08:40 local (15:40 UTC) - Place: Albuquerque, NM - Coordinates: 35.040279, -106.609169 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.0403&lon=-106.6092&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: 1 uninjured - Status: Completed, report August 22, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA - NTSB case key (mKey): 78281 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN11LA173 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78281/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78281 - Page: https://openairdocs.org/ntsb/CEN11LA173 ## Probable cause The failure of the landing gear system for undetermined reasons. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: gear extension and retract sys](https://openairdocs.org/ntsb-findings/01023230): Aircraft › Aircraft systems · Failure (probable cause); cases with it: [All aircraft, 416 cases](https://openairdocs.org/ntsb-findings/01023230/cases.md) - [Landing gear system: main landing gear](https://openairdocs.org/ntsb-findings/01023210): Aircraft › Aircraft systems · Damaged/degraded; cases with it: [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. - [Initial climb: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330); cases with it: [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis Shortly after takeoff, the hydraulic pressure caution light illuminated and the nose gear failed to retract when the pilot attempted to raise the gear. The pilot accomplished the appropriate emergency procedure checklists and unsafe gear indications remained. Following an approved flyover of the tower to verify gear position, the pilot performed a precautionary landing. During the landing the right main landing gear collapsed, resulting in substantial damage. Subsequent examination of the airplane and related hydraulic system components revealed no anomalies and the landing gear system operated normally during functional testing. The reason for the landing gear's failure could not be determined. ## Factual narrative On February 3, 2011, at 0840 mountain standard time, a Cessna 402C airplane, N5802C, was substantially damaged during landing at Albuquerque International Sunport Airport (ABQ), Albuquerque, New Mexico, following a hydraulic malfunction and subsequent collapse of the right main landing gear. The airline transport rated pilot was not injured. The non-scheduled cargo flight was being conducted under the provisions of 14 Code of Federal Regulations Part 135 with a visual flight rules (VFR) flight plan. The flight originated at ABQ, with Las Vegas Municipal Airport (LVS), Las Vegas, New Mexico, as the intended destination. Visual meteorological conditions prevailed at the time of the accident. The pilot stated that following gear retraction on initial takeoff from ABQ, the hydraulic pressure caution light illuminated and the nose landing gear failed to retract. The pilot accomplished the HYD PRESSURE LIGHT ILLUMINATED AFTER GEAR CYCLE and the LANDING GEAR WILL NOT EXTEND HYDRAULICALLY checklists and was left with unsafe gear indications. He performed an approved fly over of the ABQ tower and landed after tower personnel reported the gear appeared to be down. During the landing the right main landing gear collapsed, resulting in substantial damage to the right aileron. The airplane was examined by Federal Aviation Administration inspectors and the airplane's operator the day following the accident. The airplane was placed on jacks and the landing gear was functionally tested. The landing gear system was cycled and no anomalies were noted. The hydraulic control valve and the landing gear hydraulic shuttle valve were removed for functional testing and to check for contaminants. No anomalies were found with either unit. ## Aircraft - Registration: N5802C (not matched to a registry record) - Reported make and model: CESSNA 402 (C) - Category: Airplane - Serial number: 402C0047 - Airframe hours: 25079 - Engines: CONTINENTAL TSIO520 325 horsepower reciprocating; CONTINENTAL TSIO520 325 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Operator: South Aero Inc - Registered owner: South Aero Inc - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, January 25, 2011 - Departed: ABQ, Albuquerque, NM - Destination: LVS, Las Vegas, NM - Flight plan: VFR - Airport: ABQ, Albuquerque Intl Sunport Arpt, runway 03, 10,000 × 150 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; injuries: none; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review August 24, 2010; seat: left; flight hours: 15,000 total, 8,000 in this make and model, 14,000 as pilot in command, 84 in the last 90 days, 29 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 10° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: -0 °F, dew point -11 °F - Altimeter: 30.62 inHg - Observed at: ABQ ## Docket (3 files) The files NTSB released with the investigation on June 23, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78281. 659 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 588 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40349908&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation - Aero South Dir of Maintenance (item 2, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40349909&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20Aero%20South%20Dir%20of%20Maintenance-Redacted.PDF - Record of Conversation - FAA Inspector (item 3, .PDF, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40349910&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20FAA%20Inspector-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.