Individually Owned: 150,657
Corporate Owned: 137,281
Ontario International Airport
Aircraft Accident/Incident Report
Ontario, California 91761
Tuesady, April 30, 1996 14:36 PDT
NTSB Narrative Summary Released at Completion of Accident
The pilot reported an unresolved main landing gear problem and orbited the area performing normal emergency gear extension procedures without success. The pilot performed low 'G' maneuvers and touch-and-go landings in an attempt to lower the left main gear. The pilot diverted to another airport where an emergency landing was made with minor damage and no injuries. The landing gear was removed and disassembled. The upper bearing carriers and bearing half shells were found out of position in the upper portion of the oleo strut. The subsequent over extension of the strut was a result of the gradual breakup of the bearings and bearing carriers due to improper/incompatible wear surfaces from the repair facility's improper assembly at overhaul. The compression/extension measurements after installation were not required.
NTSB Probable Cause Narrative
The repair facility's improper assembly of the landing gear oleo strut during overhaul.
Event Information
| Type of Event | Incident |
| Event Date | 4/30/1996 |
| Event Day of the Week | Tuesday |
| Time of Event | 1436 |
| Event Time Zone | Pacific Daylight Time |
| Event City | ONTARIO |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 91761 |
| Event Date Year | 1996 |
| Event Date Month | 4 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | ONTARIO INTERNATIONAL |
| Event Location Nearest Airport ID | KONT |
| 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 | 925 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1550 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | ONT |
| Elevation of weather observation facility | 925 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 30 |
| Air Temperature at event time (in degrees celsius) | 32 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 230 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 10 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 132 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5007 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Apr 30 1996 12:00AM |
| NTSB Notification Time | 1510 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 8 2000 9:56AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N331SW |
| NTSB Number | LAX96IA184 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Boeing |
| Aircraft Model | 737-300-3H4 |
| Aircraft Series Identifier | 737-300-3H |
| Aircraft Serial Number | 23695 |
| Certified Max Gross Weight | 130000 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 145 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Apr 16 1996 12:00AM |
| Airframe hours since last inspection | 129 |
| Airframe Hours | 26697 |
| ELT Installed | Unknown |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | SOUTHWEST AIRLINES, INC. |
| Aircraft Owner Street Address | 2833 SHORECREST DRIVE |
| Aircraft Owner City | DALLAS |
| Aircraft Owner State | TX |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 75235 |
| Operator is an individual? | -- |
| Operator Name | |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P.O. BOX 36611 |
| Operator City | DALLAS |
| Operator State | TX |
| Operator Country | |
| Operator Zip code | 75235 |
| Operator Code | SWAA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| 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) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | LAS |
| Departure City | LAS VEGAS |
| Departure State | NV |
| Departure Country | |
| Departure Time | 1500 |
| Departure Time Zone | PST |
| Destination Same as Local Flt | -- |
| Destination Airport Code | BUR |
| Destination City | BURBANK |
| Destination State | CA |
| Destination Country | |
| Specific Phase of Flight | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 26R |
| Runway Length | 12200 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |