Individually Owned: 150,657
Corporate Owned: 137,281
Stapleton Intl Airport
Aircraft Accident/Incident Report
Denver, Colorado 80239
Monday, September 12, 1988 13:50 MDT
NTSB Narrative Summary Released at Completion of Accident
AS THE CAPT WAS DEPLOYING REVERSERS DRG LNDG, #2 & #3 REVERSERS UNLOCKED & DEPLOYED (GREEN LGT COND), BUT #1 REVERSER WAS BINDING & ONLY MOVED TO THE UNLOCKED PSN (AMBER LGT COND). CAPT WAS NOT WARNED OF THIS COND, THOUGH 2ND OFFICER SHOULD HAVE MONITORED LGTS. CAPT SAID HE RCHD TO CHECK #1 LEVER. AT ABT THAT TIME, ACFT YAWED RGT. DESPITE IMT ACTION BYTHE CAPT, DRCTNL CTL OF ACFT WAS LOST DUE TO YAWING CAUSED BY INOP THRUST REVERSER. ACFT CONTD OFF RWY, CROSSED 2 TWYS &NOSE GEAR COLLAPSED. AFTER STOPPING, EVACUATION WAS ORDERED. EVACUATION SLIDES DEPLOYED NMLY, BUT WITH THE ACFT ON ITS NOSE, USE OF SLIDES AT DOORS 4L & 4R WAS DISCONTINUED DUE TO EXCESSIVE VERTICAL ANGLE OF SLIDES. INV REVEALED THAT AFTERTCHDWN, #1 ENG ACCELERATED WITH FWD THRUST AS #2 & #3 ENGS PROVIDED REVERSE THRUST. AT ABT THE SAME TIME, THE ACFT'S NOSE LIFTED OFF THE RWY TO A 4 DEG ATTITUDE & THE ACFT WENT OFF THE RWY. AN EXAM OF THE THROTTLE QUADRANT REVEALED THE S1-847 SW WAS CURLED/TWISTED & 2 SUPPORT SHAFTS (HOLDING THE SWS) WERE BENT CAUSING INTMT OPN OF THE #1 REVERSER.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 9/12/1988 |
| Event Day of the Week | Monday |
| Time of Event | 1350 |
| Event Time Zone | Mountain Daylight Time |
| Event City | DENVER |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 80239 |
| 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 | STAPLETON INTL |
| Event Location Nearest Airport ID | DEN |
| 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 | 5333 |
| Weather Briefing Completeness | Full |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1351 Mountain Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | DEN |
| Elevation of weather observation facility | 5333 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | MDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 1400 |
| Lowest Non-Ceiling Height | 700 |
| Sky/Lowest/Cloud Conditions | Scattered |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 5 |
| Air Temperature at event time (in degrees celsius) | 7 |
| Dew Point at event time (in degress fahrenheit) | 6 |
| Wind Direction (degrees magnetic) | 360 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 7 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | 30 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Light |
| 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 | 1 |
| Injury Total None | 206 |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 977 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Sep 12 1988 12:00AM |
| NTSB Notification Time | 1415 |
| Fiche Number and/or location -used to find docket information | 36701 |
| 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 | N1830U |
| NTSB Number | DEN88MA203 |
| Missing Aircraft Indicator | N |
| 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 | DC-10-10 |
| Aircraft Series Identifier | DC-10-10 |
| Aircraft Serial Number | 46629 |
| Certified Max Gross Weight | 430000 |
| 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 | 257 |
| Number of Engines | 3 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Jun 19 1988 12:00AM |
| Airframe hours since last inspection | 1130 |
| Airframe Hours | 37265 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | UNITED AIRLINES |
| Aircraft Owner Street Address | P.O. BOX 60660 |
| Aircraft Owner City | CHICAGO |
| Aircraft Owner State | IL |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | |
| Operator is an individual? | -- |
| 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 | UALA |
| 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 | ORD |
| Departure City | CHICAGO |
| Departure State | IL |
| Departure Country | |
| Departure Time | 1145 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | crash at destination city |
| Destination Airport Code | DEN |
| Destination City | |
| Destination State | |
| Destination Country | |
| Specific Phase of Flight | Landing |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Dec 20 2002 12:42PM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 26L |
| Runway Length | 10004 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |