Individually Owned: 150,657
Corporate Owned: 137,281
Nantucket Airport
Aircraft Accident/Incident Report
Hyannis, Massachusetts 02601
Friday, February 11, 2005 15:35 EST
NTSB Narrative Summary Released at Completion of Accident
During a positioning flight, the pilot noticed the airplane required aileron trim to maintain level flight. The airplane landed without incident. Subsequent examination of the airplane revealed two rivets missing on the underside of the left wing, between the heat shield and a factory-installed doubler. The lower forward spar cap was cracked at wing station (WS) 114, at a rivet hole located just outboard of the outboard engine beam. The web doublers, both forward and aft, were split near the end of the inboard wing spar web at WS 112.5. The skin was cracked from the front spar lower cap up to the first stringer location behind the front spar. The airplane had been operated for about 20,510 total hours, and was required to have its forward, aft, and auxiliary wing spars inspected for cracks per FAA AD 2000-23-01, at intervals not to exceed 110 hours time-in-service. The cracked portion of the forward spar, skin and the aft web doubler were removed for further examination. The examinations revealed fatigue damage, that originated at the forward portion of the rivet hole on the spar cap at WS 114. Blackening and corrosion were observed on the fracture surface, consistent with the fracture being present at the time of the airplane's last inspection, which was conducted about a week earlier, and 12 operational hours prior to the incident.
NTSB Probable Cause Narrative
The mechanic's inadequate inspection, which failed to discover cracks in the left wing spar around wing station 114.
Event Information
| Type of Event | Incident |
| Event Date | 2/11/2005 |
| Event Day of the Week | Friday |
| Time of Event | 1535 |
| Event Time Zone | Eastern Standard Time |
| Event City | Hyannis |
| Event State | MASSACHUSETTS |
| Event Country | -- |
| Zipcode of the event site | 02601 |
| Event Date Year | 2005 |
| Event Date Month | 2 |
| MidAir Collision Indicator | -- |
| On Ground Collision occurred ? | -- |
| Event Location Latitude | 414015N |
| Event Location Longitude | 0701649W |
| Event Location Airport | Nantucket |
| 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 | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 48 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1556 Eastern Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | HYA |
| Elevation of weather observation facility | 55 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | EST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 1 |
| Dew Point at event time (in degress fahrenheit) | -10 |
| Wind Direction (degrees magnetic) | 320 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 17 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 23 |
| Altimeter Setting at event time (in. Hg) | 29.38 |
| 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 | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 20124 |
| NTSB Notification Source | NEROC |
| NTSB Notification Date | Feb 17 2005 12:00AM |
| NTSB Notification Time | 1200 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Aug 29 2006 3:49PM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Boston |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N403BK |
| NTSB Number | NYC05IA052 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Cessna |
| Aircraft Model | 402C |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 402C0330 |
| Certified Max Gross Weight | 6850 |
| 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 | 9 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | AAIP |
| Date of Last Inspection | Feb 1 2005 12:00AM |
| Airframe hours since last inspection | 12 |
| Airframe Hours | 20510 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | B and K Leasing Inc. |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Nantucket |
| Aircraft Owner State | MA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 02554 |
| Operator is an individual? | No |
| Operator Name | Island Airlines |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Hyannis |
| Operator State | MA |
| Operator Country | USA |
| Operator Zip code | 02601 |
| Operator Code | GULC |
| 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) | Positioning |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | HYA |
| Departure City | Barnstable |
| Departure State | MA |
| Departure Country | USA |
| Departure Time | -- |
| Departure Time Zone | -- |
| Destination Same as Local Flt | -- |
| Destination Airport Code | ACK |
| Destination City | Nantucket |
| Destination State | MA |
| Destination Country | USA |
| Specific Phase of Flight | Unknown |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | May 23 2006 11:48AM |
| User who most recently changed record | MUZD |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |