Tuesday, July 12, 2022

System/Component Malfunction/Failure (Non-Power): Cessna 140, N2509N; accident occurred February 11, 2022 at Coastal Carolina Regional Airport (KEWN), New Bern, Craven County, North Carolina

National Transportation Safety Board Aviation Accident Final Report

The National Transportation Safety Board did not travel to the scene of this accident.

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Greensboro, North Carolina

Investigation Docket - National Transportation Safety Board: 

Location: New Bern, North Carolina 
Accident Number: ERA22LA132
Date and Time: February 11, 2022, 11:03 Local
Registration: N2509N
Aircraft: Cessna 140 
Aircraft Damage: Substantial
Defining Event: Sys/Comp malf/fail (non-power) 
Injuries: 2 None
Flight Conducted Under: Part 91: General aviation - Personal


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.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The loss of brake pressure on the left brake due to a failed O-ring seal.


Aircraft Master cylinder/brake valve - Failure

Factual Information

History of Flight

Landing-landing roll Sys/Comp malf/fail (non-power) (Defining event)
Landing-landing roll Loss of control on ground

Pilot Information

Certificate: Commercial; Flight instructor
Age: 72, Male
Airplane Rating(s): Single-engine land 
Seat Occupied: Right
Other Aircraft Rating(s): None 
Restraint Used: Lap only
Instrument Rating(s): Airplane 
Second Pilot Present: No
Instructor Rating(s): Airplane single-engine 
Toxicology Performed:
Medical Certification: Class 2 With waivers/limitations 
Last FAA Medical Exam: May 11, 2021
Occupational Pilot: No
Last Flight Review or Equivalent: April 1, 2021
Flight Time: (Estimated) 3434 hours (Total, all aircraft), 123 hours (Total, this make and model), 3282 hours (Pilot In Command, all aircraft), 20 hours (Last 90 days, all aircraft), 9 hours (Last 30 days, all aircraft)

Passenger Information

Age: Male
Airplane Rating(s): 
Seat Occupied: Left
Other Aircraft Rating(s):
Restraint Used: Lap only
Instrument Rating(s): 
Second Pilot Present: No
Instructor Rating(s): 
Toxicology Performed:
Medical Certification: 
Last FAA Medical Exam:
Occupational Pilot: UNK
Last Flight Review or Equivalent:
Flight Time:

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N2509N
Model/Series: 140
Aircraft Category: Airplane
Year of Manufacture: 1947
Amateur Built:
Airworthiness Certificate: Normal 
Serial Number: 12766
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: January 1, 2022 Annual
Certified Max Gross Wt.: 1450 lbs
Time Since Last Inspection: 11 Hrs 
Engines: 1 Reciprocating
Airframe Total Time: 4607 Hrs as of last inspection 
Engine Manufacturer: Continental
ELT: Installed, not activated
Engine Model/Series: C-85-12F
Registered Owner:
Rated Power: 85 Horsepower
Operator: On file 
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual (VMC)
Condition of Light: Day
Observation Facility, Elevation: EWN,17 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 11:54 Local
Direction from Accident Site: 0°
Lowest Cloud Condition: Clear 
Visibility: 10 miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: / 
Turbulence Type Forecast/Actual: None / None
Wind Direction: 
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.12 inches Hg
Temperature/Dew Point: 19°C / -4°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Winterville, NC (05N)
Type of Flight Plan Filed: None
Destination: New Bern, NC
Type of Clearance: None
Departure Time: 10:00 Local 
Type of Airspace: Class D

Airport Information

Runway Surface Type: Asphalt
Airport Elevation: 17 ft msl
Runway Surface Condition: Dry
Runway Used: 22 
IFR Approach: None
Runway Length/Width: 6452 ft / 150 ft
VFR Approach/Landing: None

Wreckage and Impact Information

Crew Injuries: 1 None 
Aircraft Damage: Substantial
Passenger Injuries: 1 None 
Aircraft Fire: None
Ground Injuries: 
Aircraft Explosion: None
Total Injuries: 2 None 
Latitude, Longitude: 35.07285,-77.0433 (est)

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