Individually Owned: 150,657
Corporate Owned: 137,281
Newark Liberty Airport
Aircraft Accident/Incident Report
Newark, New Jersey 07201
Monday, August 21, 2006 6:30 EDT
NTSB Narrative Summary Released at Completion of Accident
The Boeing 737 was being towed for repositioning by maintenance personnel, when the nose landing gear collapsed forward into the wheel well. The nose landing gear remained attached to the airplane by its primary trunnion support and upper drag brace. Metallurgical examination of the nose landing gear lower and upper drag braces, and lock brace, revealed no evidence of preexisting cracking, and that they failed due to overstress. Examination and testing of the nose landing gear steering components did not reveal any pre-incident malfunctions. The maintenance technician in the cockpit reported that he was "riding the brakes" at the time of the incident. The airplane maintenance manual stated that at a minimum, applying airplane brakes while towing the airplane could shear the towbar shear pins; however, there was no visible evidence on the ground that the airplane's brakes had been applied during the tow. After the incident, Boeing issued a service letter that discussed six previous reports of 737 nose landing gear collapse that occurred between 2004 to 2006 during pushback or towing. It also addressed current towbar design, and provided recommendations for operators intended to minimize the likelihood of nose gear damage or collapse during towing\pushback operations.
NTSB Probable Cause Narrative
An overload failure of the airplane's nose landing gear while being towed for repositioning.
Event Information
| Type of Event | Incident |
| Event Date | 8/21/2006 |
| Event Day of the Week | Monday |
| Time of Event | 630 |
| Event Time Zone | Eastern Daylight Time |
| Event City | Newark |
| Event State | NEW JERSEY |
| Event Country | -- |
| Zipcode of the event site | 07201 |
| Event Date Year | 2006 |
| Event Date Month | 8 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 404133N |
| Event Location Longitude | 0741007W |
| Event Location Airport | Newark Liberty |
| Event Location Nearest Airport ID | EWR |
| 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 | 18 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 551 Eastern Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | EWR |
| Elevation of weather observation facility | 18 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | EDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 5000 |
| Sky/Lowest/Cloud Conditions | Few |
| 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) | 21 |
| Dew Point at event time (in degress fahrenheit) | 14 |
| Wind Direction (degrees magnetic) | 330 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29.94 |
| 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) | 23144 |
| NTSB Notification Source | FAA Teterboro FSDO |
| NTSB Notification Date | Aug 22 2006 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Mar 31 2008 11:52AM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Teterboro |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N14655 |
| NTSB Number | NYC06IA207 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | -- |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Boeing |
| Aircraft Model | 737-524 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 28916 |
| Certified Max Gross Weight | 124500 |
| 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 | 114 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Jul 1 2006 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 22644 |
| ELT Installed | No |
| ELT Activated | -- |
| ELT Aided Location of Event Site | -- |
| ELT Type | -- |
| Aircraft Owner Name | CONTINENTAL AIRLINES INC |
| Aircraft Owner Street Address | 1600 Smith Street |
| Aircraft Owner City | Houston |
| Aircraft Owner State | TX |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 77002 |
| Operator is an individual? | No |
| Operator Name | CONTINENTAL AIRLINES INC |
| 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 | CALA |
| Owner has at least one certificate | -- |
| 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 | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | -- |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | -- |
| Departure City | -- |
| Departure State | -- |
| Departure Country | -- |
| Departure Time | -- |
| Departure Time Zone | -- |
| Destination Same as Local Flt | -- |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Taxi - pushback/tow |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Feb 16 2008 2:26PM |
| 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 | -- |