Individually Owned: 150,657
Corporate Owned: 137,281
Southbridge Airport
Aircraft Accident/Incident Report
Southbridge, Massachusetts 01550
Thursday, July 11, 1985 17:00 EDT
NTSB Narrative Summary Released at Completion of Accident
DURING LNDG THE ACFT IMPACTED HARD AND SKIDDED DOWN THE RWY BEFORE IT WENT OFF THE LEFT SIDE OF THE RWY. THE LEFT MAIN WHEEL SEPARTED AND THE NOSE GEAR COLLAPSED. BOTH PLTS STATED THE LNDG APCH WAS NORMAL UNTIL THE ACFT WAS APRX 15 FTABOVE THE RWY AT WHICH TIME THE ACFT ABRUPTLY DESCENDED AND IMPACTED HARD WITH THE RWY. PRIOR TO THE IMPACT, THE ACFT WAS CONFIGURED WITH 20 DEGS OF FLAPS AND LNDG GEAR WAS DOWN AND LOCKED. THE AIRSPEED WAS 105 KTS. EXAMINATION OF THE ACFT DISCLOSED THAT THE AFT MAIN GEAR DOORS WERE OPEN AND THE NOSE DOWN LOCK LIMIT SWITCH WAS DEFECTIVE. THE SWITCH IS REQUIRED TO CLOSE THE AFT MAIN GEAR DOOR. THE FLIGHT TEST BY THE MFG DETERMINED THAT OPENED AFT MAIN GEAR DOOR HAS NONE TO UNNOTICIABLE EFFECT ON STALL SPEED. ACFT SPEED AT TOUCHDOWN BASED ON COMPUTATIONS FROM PROP SLASH MARKS WAS 86 KTS. THE STALL SPEED OF ACFT AT PREVAILING WEIGHT & FLAPS CONFIGURATION IS BELOW THIS SPEED, THE ACFT WEIGHT WAS APRX 9000 LBS.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 7/11/1985 |
| Event Day of the Week | Thursday |
| Time of Event | 1700 |
| Event Time Zone | Eastern Daylight Time |
| Event City | SOUTHBRIDGE |
| Event State | MASSACHUSETTS |
| Event Country | -- |
| Zipcode of the event site | 01550 |
| Event Date Year | 1985 |
| Event Date Month | 7 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | SOUTHBRIDGE |
| Event Location Nearest Airport ID | 3BO |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1645 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 50 |
| Weather Observation Facility ID | ORH |
| Elevation of weather observation facility | 1008 |
| Distance of event from weather observation facility (units?) | 20 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 40 |
| Air Temperature at event time (in degrees celsius) | 25 |
| Dew Point at event time (in degress fahrenheit) | 9 |
| Wind Direction (degrees magnetic) | 270 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 5 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | 0 |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 3 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 1620 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Jul 11 1985 12:00AM |
| NTSB Notification Time | 2218 |
| Fiche Number and/or location -used to find docket information | 28997 |
| Date of most recent change to record | Jan 2 2001 9:15AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N727MA |
| NTSB Number | NYC85FA163 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 91F: Special Flt Ops. |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Destroyed |
| Aircraft Fire | Ground |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | MITSUBISHI |
| Aircraft Model | MU-2B-26 |
| Aircraft Series Identifier | MU-2B-26 |
| Aircraft Serial Number | 342 |
| Certified Max Gross Weight | 10470 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 6 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Unknown |
| Date of Last Inspection | Jan 31 1985 12:00AM |
| Airframe hours since last inspection | 945 |
| Airframe Hours | 26958 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | GENTEX CORP. |
| Aircraft Owner Street Address | BOX 315 |
| Aircraft Owner City | CARBONDALE |
| Aircraft Owner State | PA |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 18407 |
| Operator is an individual? | -- |
| 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? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Unknown |
| Indicates Domestic or International Flight | Unknown |
| Operator carrying Pax/Cargo/Mail | Unknown |
| Type of Flying (Per_Bus / Primary) | Executive/Corporate |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | MHT |
| Departure City | MANCHESTER |
| Departure State | NH |
| Departure Country | |
| Departure Time | 1640 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 2 |
| Runway Length | 3500 |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |