Individually Owned: 151,845
Corporate Owned: 143,699
Nantucket Memorial Airport
Aircraft Accident/Incident Report
Nantucket, Massachusetts 02554
Friday, October 19, 2012 14:12 EDT
NTSB Narrative Summary Released at Completion of Accident
Shortly after takeoff, a tower air traffic controller notified the flight crew that fuel was pouring from the left wing. The crew also noted hydraulic and flight control annunciator messages and a gear unlocked indication. The flight remained in the traffic pattern and the airplane landed with a fuel imbalance of about 1,000 pounds. An examination of the airplane after the incident revealed minor damage in the left wing and gear well areas. The left main gear aft trunnion pivot pin was not in place, resulting in separation of the aft portion of the left main gear trunnion from the aft trunnion fitting. The end of the aft trunnion punctured the interior of the gear well, resulting in damage to surrounding structure and damage to the fuel cell and hydraulic line. The damage resulted in the fuel leak and the flight control and hydraulic messages. The pin was later found loose and undamaged in the flap track area of the left wing. The aft trunnion pivot pin retaining bolt that was intended to restrain the pivot pin was in place and secured with a nut and cotter pin. A review of maintenance records for the airplane revealed that the left main gear trunnion was removed and replaced with a new unit about six weeks before the incident. The maintenance was performed by an outside vendor. According to the airplane maintenance manual, when installing the aft main landing gear trunnion, the trunnion pivot pin must be slid forward, aligning a hole in the trunnion with a hole in the pivot pin. The trunnion pivot pin is then secured in place with the retaining bolt, washers, nut, and cotter pin. It is likely that the incorrect installation of the left main gear aft trunnion allowed the aft trunnion pivot pin to eventually exit the trunnion and attach fitting. This allowed the aft trunnion to puncture the interior of the gear well.
NTSB Probable Cause Narrative
The incorrect installation of the left main gear aft trunnion pivot pin by maintenance personnel, which resulted in separation of the aft portion of the left main gear trunnion from the aft trunnion fitting and minor damage to the airplane.
Event Information
| Type of Event | Incident |
| Event Date | 10/19/2012 |
| Event Day of the Week | Friday |
| Time of Event | 1412 |
| Event Time Zone | Eastern Daylight Time |
| Event City | Nantucket |
| Event State | MASSACHUSETTS |
| Event Country | -- |
| Zipcode of the event site | 02554 |
| Event Date Year | 2012 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 411511N |
| Event Location Longitude | 0700337W |
| Event Location Airport | Nantucket Memorial |
| Event Location Nearest Airport ID | ACK |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 47 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1353 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 60 |
| Weather Observation Facility ID | ACK |
| Elevation of weather observation facility | 47 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 9000 |
| Lowest Non-Ceiling Height | 500 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 8 |
| Air Temperature at event time (in degrees celsius) | 18 |
| Dew Point at event time (in degress fahrenheit) | 17 |
| Wind Direction (degrees magnetic) | 130 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 18 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 24 |
| Altimeter Setting at event time (in. Hg) | 29.91 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 3 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 31378 |
| NTSB Notification Source | NetJets Safety |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Aug 27 2013 11:03AM |
| User who most recently changed record | johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N576QS |
| NTSB Number | ERA13IA036 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | CESSNA |
| Aircraft Model | 560XL |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 560-5708 |
| Certified Max Gross Weight | 20200 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | 2 |
| Cabin Crew Seats | -- |
| Passenger Seats | 7 |
| Total number of seats on the aircraft | 9 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Sep 5 2012 12:00AM |
| Airframe hours since last inspection | 53 |
| Airframe Hours | 4843 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | Unknown |
| Aircraft Owner Name | MARQUIS JET HOLDINGS INC |
| Aircraft Owner Street Address | C/O NETJETS SALES INC |
| Aircraft Owner City | OKLAHOMA CITY |
| Aircraft Owner State | OK |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 73102-8601 |
| Operator is an individual? | No |
| Operator Name | NetJets Aviation, Inc. |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Columbus |
| Operator State | OH |
| Operator Country | USA |
| Operator Zip code | 43219 |
| Operator Code | DXTA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | DXTA401D |
| Indicates whether an air carrier operation was scheduled or not | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | -- |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | ACK |
| Departure City | Nantucket |
| Departure State | MA |
| Departure Country | USA |
| Departure Time | 1412 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | LEX |
| Destination City | Lexington |
| Destination State | KY |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | May 6 2013 11:00AM |
| User who most recently changed record | kenj |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 06 |
| Runway Length | 6303 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |