Individually Owned: 150,657
Corporate Owned: 137,281
Will Rogers World Airport
Aircraft Accident/Incident Report
Oklahoma City, Oklahoma 73101
Friday, June 10, 2005 11:25 CST
NTSB Narrative Summary Released at Completion of Accident
During the landing rollout, a high-pressure hydraulic line ruptured and penetrated the interior wall of the cabin, and subsequently sprayed hydraulic fluid into the cabin and passengers. The passengers evacuated with minimal injuries. Examination of the airplane revealed that one of the three, 10-foot-long hydraulic lines that ran vertically along the circumference of the fuselage had failed at a shallow bend that was designed into the line when it was manufactured. A metallurgical examination of the line revealed that it failed due to a longitudinal defect that measured .0012-inches in depth on the inner diameter surface near a weld that occurred during the manufacturing process. This was the second known failure of this same-type hydraulic line. However, the first failure had a larger defect and the manufacturer's inspection specifications indicated that it should have been rejected during the testing process. According to the manufacturer, if a defect was measured below .002-inches in depth, then the line was considered acceptable provided that the defect could be removed and the line continued to meet wall thickness and ovality requirements.
NTSB Probable Cause Narrative
Failure of a high pressure hydraulic line from fatigue as a result of a manufacturing defect.
Event Information
| Type of Event | Incident |
| Event Date | 6/10/2005 |
| Event Day of the Week | Friday |
| Time of Event | 1125 |
| Event Time Zone | Central Standard Time |
| Event City | Oklahoma City |
| Event State | OKLAHOMA |
| Event Country | -- |
| Zipcode of the event site | 73101 |
| Event Date Year | 2005 |
| Event Date Month | 6 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 352321N |
| Event Location Longitude | 0973601W |
| Event Location Airport | Will Rogers World Airport |
| Event Location Nearest Airport ID | OKC |
| 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 | 1295 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1152 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | OKC |
| Elevation of weather observation facility | 1295 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 3400 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 28 |
| Dew Point at event time (in degress fahrenheit) | 21 |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 14 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.81 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | 2 |
| Injury Total None | 58 |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 20733 |
| NTSB Notification Source | Mesaba Airlines |
| NTSB Notification Date | Jun 10 2005 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Dec 28 2006 9:08AM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Oklahoma City, Oklahoma |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N530XJ |
| NTSB Number | DFW05IA156 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | Yes |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | British Aerospace |
| Aircraft Model | Avro 146-RJ85A |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | E2364 |
| Certified Max Gross Weight | 76000 |
| 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 | 70 |
| Number of Engines | 4 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | 11432 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | NORTHWEST AIRLINES INC |
| Aircraft Owner Street Address | 5101 Northwest Drive Dept C8960 |
| Aircraft Owner City | St Paul |
| Aircraft Owner State | MN |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 55111 |
| 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 | MR5D |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | Yes |
| 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 | MEM |
| Departure City | Memphis |
| Departure State | TN |
| Departure Country | USA |
| Departure Time | 1015 |
| Departure Time Zone | CST |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | OKC |
| Destination City | Oklahoma City |
| Destination State | OK |
| Destination Country | USA |
| Specific Phase of Flight | Landing - roll |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Sep 28 2006 2:58PM |
| User who most recently changed record | CASH |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | 17L |
| Runway Length | 9802 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |