Individually Owned: 150,657
Corporate Owned: 137,281
Dfw Reg. Airport
Aircraft Accident/Incident Report
Dfw Airport, Texas 75261
Wednesday, September 21, 1988 21:42 CDT
NTSB Narrative Summary Released at Completion of Accident
ACFT RECEIVED MINOR DAMAGE WHEN THE PLT EXECUTED AN EMERGENCY GEAR UP LANDING FOLLOWING THE FAILURE OF THE MLG TO EXTEND USING NORMAL, ABNORMAL, AND MANUAL PROCEDURES. ACFT WAS LANDED WITH THE NLG EXTENDED AND THE MAINS RETRACTED. INVESTIGATION REVEALED THAT THE LEFT MLG DOOR ACTUATOR PIVOT TRUNNION UPPER SHAFT HAD FAILED AS A RESULT OF A FATIGUE FRACTURE. FOLLOWING THE FRACTURE, THE SEPARATED SHAFT HAD BECOME JAMMED BETWEEN THE TRUNNION AND THE ACTUATOR CLEVIS WHICH PREVENTED THE MANUAL DOOR UNLOCK MECHANISM FROM RELEASING. A REVIEW OF THE SERVICE DIFFICULTY HISTORY OF THE FAILED PART INDICATED THAT SEVERAL SIMILAR FAILURES HAD OCCURRED ON MANUFACTURED PARTS AND THAT A REDESIGNED PART WAS AVAILABLE FOR REPLACEMENT. THE OPERATOR HAD COMPLIED WITH ALL OF THE REQUIRED INSP'S.
NTSB Probable Cause Narrative
FATIGUE FAILURE OF THE LEFT MAIN LANDING GEAR DOOR ACTUATOR PIVOT TRUNNION SHAFT WHICH SUBSEQUENTLY BECAME LODGED IN THE ACTUATOR CLEVIS PREVENTING THE DOOR UNLOCK MECHANISM FROM ACTUATING DURING GEAR EXTENSION.
Event Information
| Type of Event | Incident |
| Event Date | 9/21/1988 |
| Event Day of the Week | Wednesday |
| Time of Event | 2142 |
| Event Time Zone | Central Daylight Time |
| Event City | DFW AIRPORT |
| Event State | TEXAS |
| Event Country | -- |
| Zipcode of the event site | 75261 |
| Event Date Year | 1988 |
| Event Date Month | 9 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | DFW REG. |
| Event Location Nearest Airport ID | DFW |
| Indicates whether the acc/inc occurred off or on an airport | On Airport |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 603 |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 2051 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | DFW |
| Elevation of weather observation facility | 603 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Night/Bright |
| 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) | 15 |
| Air Temperature at event time (in degrees celsius) | 29 |
| Dew Point at event time (in degress fahrenheit) | 17 |
| Wind Direction (degrees magnetic) | 170 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 8 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 29 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | Minor |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | 4 |
| Injury Total None | 84 |
| Injury Total Serious | -- |
| Injury Total All | 4 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5090 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Sep 21 1988 12:00AM |
| NTSB Notification Time | 2155 |
| Fiche Number and/or location -used to find docket information | 40014 |
| Date of most recent change to record | Dec 13 2000 12:08PM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N710AA |
| NTSB Number | FTW88IA165 |
| 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 | 727-200 |
| Aircraft Series Identifier | 727-200 |
| Aircraft Serial Number | 22467 |
| Certified Max Gross Weight | 191000 |
| 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 | 157 |
| Number of Engines | 3 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Sep 17 1988 12:00AM |
| Airframe hours since last inspection | 8 |
| Airframe Hours | 20873 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | AMERICAN AIRLINES INC. |
| Aircraft Owner Street Address | P.O. BOX 619616 |
| Aircraft Owner City | DFW AIRPORT |
| Aircraft Owner State | TX |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 75261 |
| Operator is an individual? | -- |
| Operator Name | AMERICAN AIRLINES, INC. |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | P.O. BOX 619616 |
| Operator City | DFW AIRPORT |
| Operator State | TX |
| Operator Country | |
| Operator Zip code | 76179 |
| Operator Code | AALA |
| 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/Cargo |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | No |
| Departure Airport Code | OKC |
| Departure City | OKLAHOMA CITY |
| Departure State | OK |
| Departure Country | |
| Departure Time | 2012 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | DFW |
| Destination City | |
| Destination State | |
| 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 | 18L |
| Runway Length | 11388 |
| Runway Width | 200 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |