# NTSB ERA22LA132: Cessna 140, N2509N, New Bern, NC, February 11, 2022 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: February 11, 2022, 11:03 local (16:03 UTC) - Place: New Bern, NC · runway to taxiway - Coordinates: 35.07285, -77.0433 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.0729&lon=-77.0433&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 104685 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA22LA132 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104685/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=104685 - Page: https://openairdocs.org/ntsb/ERA22LA132 ## Probable cause The loss of brake pressure on the left brake due to a failed O-ring seal. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Landing gear system: master cylinder/brake valve](https://openairdocs.org/ntsb-findings/01023243): Aircraft › Aircraft systems · Failure; cases with it: [Cessna 140, 1 case](https://openairdocs.org/ntsb-findings/01023243/cases.md?model=2071602), [All aircraft, 21 cases](https://openairdocs.org/ntsb-findings/01023243/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: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330) (defining event); cases with it: [Cessna 140, 5 cases](https://openairdocs.org/ntsb-events/330/sequence.md?model=2071602), [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Cessna 140, 46 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2071602), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot reported that during his landing roll, he attempted to slow the airplane as he exited the runway for the taxiway. As he applied brakes, the left brake loss pressure and the right brake maintained its pressure and operated normally. This anomaly caused the airplane to ground loop, which resulted in substantial damage to the left wing. Examination of the airplane by a Federal Aviation Administration inspector revealed the left brake master cylinder was void of fluid. Fluid was filled into the master cylinder and when pressure was applied to simulate braking, fluid began to seep from the master cylinder. The master cylinder was disassembled revealing a damaged O-ring seal. The O-ring was pinched and cut; therefore, unable to maintain hydraulic fluid within the master cylinder and resulted in the loss of braking. A review of maintenance records reveal that the braking system was serviced about a month prior, but no anomalies were noted during the service. ## Aircraft - Registration: [N2509N](https://openairdocs.org/deregistered/N2509N-2023-08-08), registration cancelled 2023-08-08, S/N 12766, built 1947 (OpenAirDocs) - Reported make and model: CESSNA 140 - Registry model: [Cessna 140](https://openairdocs.org/model/cessna-140) (registry code 2071602) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane - Serial number: 12766 - Year built: 1947 - Airframe hours: 4607 - Engines: Continental C-85-12F 85 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, January 1, 2022, 11 hours before - Departed: 05N, Winterville, NC - Destination: Same as departure - Airport: EWN, Coastal Carolina Rgnl, runway 22, 6,452 × 150 ft, asphalt - Equipment: Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 72; injuries: none; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review April 1, 2021; seat: right; restraint: lap only; flight hours: 3,434 total, 123 in this make and model, 3,282 as pilot in command, 20 in the last 90 days, 9 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 66 °F, dew point 25 °F - Altimeter: 30.12 inHg - Observed at: EWN - METAR: METAR KEWN 111654Z VRB06KT 10SM CLR 19/M04 A3012 RMK AO2 SLP199 T01941044 ## 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 20220211001589A](https://openairdocs.org/incident/20220211001589A), Feb 11, 2022: Cessna 140, New Bern, NC, Minor damage. Pilot stated he had landed runway 22 as he approached taxiway foxtrot the aircraft had slowed to the point where he thought he could easily exit the runway for… ## Other investigations on N2509N (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 ERA22LA432](https://openairdocs.org/ntsb/ERA22LA432), Sep 28, 2022: Cessna 140 (N2509N), Winterville, NC, substantial damage. Probable cause: The student pilot’s improper recovery from a bounced landing. A factor in the accident was the instructor’s delayed remedial action which resulted in an inability to recover the airplane from an… ## Docket (6 files) The files NTSB released with the investigation on May 26, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=104685. 6.5 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13337630&FileExtension=pdf&FileName=NTSB%206120%20LA132_Redacted-Rel.pdf - Memorandum for record FAA statement (item 2, PDF, 1 page, 128 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13336860&FileExtension=pdf&FileName=Memorandum%20Of%20Record%20FAA%20statement%20LA132-Rel.pdf - Maintenance records (item 3, PDF, 2 pages, 2.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13430754&FileExtension=pdf&FileName=MX%20records%20LA132_Redacted-Rel.pdf - Memorandum for record IA statement (item 4, PDF, 1 page, 128 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13337435&FileExtension=pdf&FileName=Memorandum%20Of%20Record%20IA%20statement%20LA132-Rel.pdf - Memorandum for record A&P mechanics email statement (item 5, PDF, 2 pages, 130 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13398768&FileExtension=pdf&FileName=Memorandum%20for%20Record%20mechanics%20statment%20LA132-Rel.pdf - Investigative photos (item 6, PDF, 4 pages, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13399238&FileExtension=pdf&FileName=Investigative%20photos%20LA132-Rel.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.