Individually Owned: 150,657
Corporate Owned: 137,281
Brandywinde Airport
Aircraft Accident/Incident Report
West Chester, Pennsylvania 19380
Friday, September 14, 2007 10:49 EDT
NTSB Narrative Summary Released at Completion of Accident
The airplane touched down more than halfway beyond the approach end of runway 9; a 3,347-foot-long, 50-foot-wide, asphalt runway. The pilot applied heavy braking, and the airplane veered off the right side of the runway. Examination of the wreckage revealed that the left brake disc had separated from its housing. The right brake disc had cracked, but remained attached to its housing. The left and right brake discs exhibited corrosion. The airplane's most recent annual inspection was completed about 4 months prior to the accident. The mechanic that performed the annual inspection stated that he did not observe corrosion on the brakes at that time. Airworthiness Directive (AD) 71-06-08 addressed repetitive brake disc inspections and replacements; however, the make and model brake disk on the accident airplane was not included on the AD. The reported weather at an airport near the accident site, about the time of the accident, included winds from 160 degrees at 8 knots, varying between 120 degrees and 200 degrees.
NTSB Probable Cause Narrative
The total failure of the left brake disc due to corrosion.
Event Information
| Type of Event | Accident |
| Event Date | 9/14/2007 |
| Event Day of the Week | Friday |
| Time of Event | 1049 |
| Event Time Zone | Eastern Daylight Time |
| Event City | West Chester |
| Event State | PENNSYLVANIA |
| Event Country | -- |
| Zipcode of the event site | 19380 |
| Event Date Year | 2007 |
| Event Date Month | 9 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 395925N |
| Event Location Longitude | 0753455W |
| Event Location Airport | Brandywinde Airport |
| Event Location Nearest Airport ID | OQN |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 466 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1054 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 180 |
| Weather Observation Facility ID | PTW |
| Elevation of weather observation facility | 309 |
| Distance of event from weather observation facility (units?) | 15 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 4900 |
| Lowest Non-Ceiling Height | 3000 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 22 |
| Dew Point at event time (in degress fahrenheit) | 16 |
| Wind Direction (degrees magnetic) | 160 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 8 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.14 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 1 |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 23631 |
| NTSB Notification Source | PHL FSDO |
| NTSB Notification Date | Sep 14 2007 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | May 28 2008 12:03PM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Philadelphia, PA |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N5073T |
| NTSB Number | NYC07LA227 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Beech |
| Aircraft Model | A23-24 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | MA-319 |
| Certified Max Gross Weight | 2550 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 6 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Annual |
| Date of Last Inspection | May 1 2007 12:00AM |
| Airframe hours since last inspection | 8 |
| Airframe Hours | 2300 |
| ELT Installed | Yes |
| ELT Activated | Yes |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Warren B Knowles |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Georgetown |
| Aircraft Owner State | DE |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 19947 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | -- |
| Indicates Domestic or International Flight | -- |
| Operator carrying Pax/Cargo/Mail | -- |
| Type of Flying (Per_Bus / Primary) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | GED |
| Departure City | Georgetown |
| Departure State | DE |
| Departure Country | USA |
| Departure Time | 930 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | OQN |
| Destination City | West Chester |
| Destination State | PA |
| Destination Country | USA |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | May 11 2008 3:50PM |
| User who most recently changed record | MUZD |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 9 |
| Runway Length | 3347 |
| Runway Width | 50 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |