Individually Owned: 150,657
Corporate Owned: 137,281
Denver International Airport
Aircraft Accident/Incident Report
Denver, Colorado 80019
Friday, May 13, 2005 18:20 MDT
NTSB Narrative Summary Released at Completion of Accident
Shortly after takeoff, the pilots heard a loud bang and the cabin lost pressurization. The pilots observed an unsafe nose gear indication. They placed the gear handle in the down position and got three green lights. The control tower confirmed that the landing gear were down when the aircraft performed a low pass. The flight made an uneventful landing at Denver. Post-accident examination by maintenance personnel revealed a hole in the forward pressure bulkhead and broken nose gear actuator. The nose landing gear actuator piston rod had worn threads, and a key locking washer in the gear assembly was sheared. The airline said that this was original equipment.
NTSB Probable Cause Narrative
the failure of the nose gear actuator resulted in penetration of the forward pressure bulkhead and a loss of pressurization.
Event Information
| Type of Event | Accident |
| Event Date | 5/13/2005 |
| Event Day of the Week | Friday |
| Time of Event | 1820 |
| Event Time Zone | Mountain Daylight Time |
| Event City | Denver |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 80019 |
| Event Date Year | 2005 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | -- |
| Event Location Longitude | -- |
| Event Location Airport | Denver International |
| Event Location Nearest Airport ID | DEN |
| 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 | 5431 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1753 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | DEN |
| Elevation of weather observation facility | 5431 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | MDT |
| Lighting Conditions | Not Reported |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 8000 |
| 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) | 17 |
| Dew Point at event time (in degress fahrenheit) | -1 |
| Wind Direction (degrees magnetic) | 40 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 8 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.12 |
| 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 | 98 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 18450 |
| NTSB Notification Source | FAA Northwest Mountain Region |
| NTSB Notification Date | May 17 2005 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Oct 27 2005 6:51AM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Denver |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N949DL |
| NTSB Number | DEN05LA077 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | McDonnell Douglas |
| Aircraft Model | MD-88 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 49880 |
| Certified Max Gross Weight | 149500 |
| 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 | 150 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | May 1 2005 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 41789 |
| ELT Installed | -- |
| ELT Activated | -- |
| ELT Aided Location of Event Site | -- |
| ELT Type | -- |
| Aircraft Owner Name | On FIle |
| Aircraft Owner Street Address | On File |
| Aircraft Owner City | Atlanta |
| Aircraft Owner State | GA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 30320 |
| Operator is an individual? | No |
| 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 | DALA |
| 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 | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | DEN |
| Departure City | Denver |
| Departure State | CO |
| Departure Country | USA |
| Departure Time | 1807 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | ATL |
| Destination City | Atlanta |
| Destination State | GA |
| Destination Country | USA |
| Specific Phase of Flight | Climb - to cruise |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jul 25 2005 12:35PM |
| User who most recently changed record | MCBM |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |