Individually Owned: 150,657
Corporate Owned: 137,281
Lawrence Municipal Airport
Aircraft Accident/Incident Report
Lawrence, Massachusetts 01840
Tuesady, June 6, 2006 19:30 EDT
NTSB Narrative Summary Released at Completion of Accident
The commercial pilot was conducting a practice missed approach under instruction, when a propeller blade separated. The flight instructor took control of the airplane and shut down the engine to prevent further damage. He then made a Mayday call and glided the airplane to a successful runway landing. A postflight examination of the airplane revealed that the propeller blade was separated about 12 inches from the center of the hub. Metallurgical examination of the remaining fracture face revealed fatigue cracking that emanated from an indentation at the blade's leading edge. The fatigue crack propagated through approximately 50 percent of the fracture face, and beyond that, there was a band of overstress cracking. There was no evidence of corrosion, and a chemical analysis of the propeller blade revealed that the hardness and chemical composition of the blade met the requirements of the applicable engineering drawing. The flight instructor stated that during the airplane's preflight inspection, both he and the commercial pilot visually inspected the propeller blade, and ran their hands along the leading and trailing edges with no anomalies noted. The most recent maintenance inspection of the propeller occurred about 1 month before the incident.
NTSB Probable Cause Narrative
Foreign object damage to the leading edge of the propeller blade, which resulted in fatigue cracking and subsequent blade failure.
Event Information
| Type of Event | Incident |
| Event Date | 6/6/2006 |
| Event Day of the Week | Tuesday |
| Time of Event | 1930 |
| Event Time Zone | Eastern Daylight Time |
| Event City | Lawrence |
| Event State | MASSACHUSETTS |
| Event Country | -- |
| Zipcode of the event site | 01840 |
| Event Date Year | 2006 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 424302N |
| Event Location Longitude | 0710724W |
| Event Location Airport | Lawrence Municipal |
| Event Location Nearest Airport ID | LWM |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | 148 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1954 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | LWM |
| Elevation of weather observation facility | 179 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | EDT |
| 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) | 18 |
| Dew Point at event time (in degress fahrenheit) | 13 |
| Wind Direction (degrees magnetic) | 90 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.05 |
| 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 | 2 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 22158 |
| NTSB Notification Source | BOS FSDO |
| NTSB Notification Date | Jun 8 2006 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Aug 30 2007 12:18PM |
| User who most recently changed record | NTSB\lema |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Boston |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N2138W |
| NTSB Number | NYC06IA143 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| 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 | 172S |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 172S9561 |
| 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 | 4 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | 100 Hour |
| Date of Last Inspection | May 1 2007 12:00AM |
| Airframe hours since last inspection | 53 |
| Airframe Hours | 1623 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Kelley B Dineen, LLC |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Bridgewater |
| Aircraft Owner State | MA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 02324 |
| Operator is an individual? | No |
| Operator Name | King Aviation |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | -- |
| Operator City | Mansfield |
| Operator State | MA |
| Operator Country | USA |
| Operator Zip code | 02048 |
| 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) | Instructional |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | 1B9 |
| Departure City | Mansfield |
| Departure State | MA |
| Departure Country | USA |
| Departure Time | 1530 |
| Departure Time Zone | EDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | 1B9 |
| Destination City | Mans |
| Destination State | MA |
| Destination Country | USA |
| Specific Phase of Flight | Missed approach (IFR) |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Aug 13 2007 2:13PM |
| User who most recently changed record | MUZD |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 32 |
| Runway Length | 3901 |
| Runway Width | 100 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |