Individually Owned: 150,657
Corporate Owned: 137,281
Stapleton International Airport
Aircraft Accident/Incident Report
Denver, Colorado 80220
Thursday, May 23, 1991 20:25 MDT
NTSB Narrative Summary Released at Completion of Accident
DURING MID-BASE LEG FOR A VFR APPROACH TO LANDING AT STAPELTON INTERNATIONAL AIRPORT, THE PILOT OF N81TR WAS SELECTING FULL FLAP POSITION, WHEN HE HEARD A DULL THUD. THE AIRCRAFT STARTED A ROLL TO THE LEFT, BUT THE PILOT WAS ABLE TO MAINTAIN CONTROL OF THE AIRCRAFT UNITL HE COULD RAISE THE FLAP HANDLE. AFTER SELECTING 'FLAP UP POSITION,' THE AIRCRAFT RETURNED TO NORMAL FLIGHT, AND A NORMAL NO FLAP LANDING WAS ACCOMPLISHED. AFTER LANDING, THE AIRCRAFT WAS PARKED AND INSPECTED. A BROKEN FLAP CABLE WAS FOUND. LATER, TESTS REVEALED THE CABLE HAD SEPARATED DUE TO FATIGUE.
NTSB Probable Cause Narrative
FATIGUE FAILURE OF FLAP CABLE.
Event Information
| Type of Event | Incident |
| Event Date | 5/23/1991 |
| Event Day of the Week | Thursday |
| Time of Event | 2025 |
| Event Time Zone | Mountain Daylight Time |
| Event City | DENVER |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 80220 |
| Event Date Year | 1991 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | STAPLETON 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 | 0 |
| Degrees magnetic from airport | 0 |
| Airport Elevation | 5333 |
| Weather Briefing Completeness | Not pertinent |
| Investigator's weather source | Witness |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Dusk |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 3000 |
| Sky/Lowest/Cloud Conditions | Scattered |
| 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) | -18 |
| Dew Point at event time (in degress fahrenheit) | -18 |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 5 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | 0 |
| 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 | 1 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5013 |
| NTSB Notification Source | -- |
| NTSB Notification Date | -- |
| NTSB Notification Time | 0 |
| Fiche Number and/or location -used to find docket information | 44986 |
| Date of most recent change to record | Dec 18 2002 11:28AM |
| User who most recently changed record | NTSB\GIUV |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N81TR |
| NTSB Number | DEN91IA076 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 135: Air Taxi & Commuter |
| Type of Flight Plan filed | Unknown |
| Flight plan Was Activated? | -- |
| Damage | None |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | AERO COMMANDER |
| Aircraft Model | 690C |
| Aircraft Series Identifier | 690C |
| Aircraft Serial Number | 11690 |
| Certified Max Gross Weight | 9200 |
| 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 | 2 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Unknown |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | 0 |
| Airframe Hours | -- |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | CASPER AIR SERVICE |
| Aircraft Owner Street Address | 300 AIRPORT RD. |
| Aircraft Owner City | CASPER |
| Aircraft Owner State | WY |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 82604 |
| Operator is an individual? | -- |
| Operator Name | CASPER AIR SERVICE |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | |
| Operator City | |
| Operator State | |
| Operator Country | |
| Operator Zip code | |
| Operator Code | CBCA |
| 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 | Non-scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Cargo |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | No |
| Departure Point Same as Event | No |
| Departure Airport Code | CYS |
| Departure City | CHEYENNE |
| Departure State | WY |
| Departure Country | |
| Departure Time | 1912 |
| Departure Time Zone | MDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | DEN |
| Destination City | DENVER |
| Destination State | CO |
| Destination Country | |
| Specific Phase of Flight | Approach |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:35AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 18 |
| Runway Length | 7700 |
| Runway Width | 150 |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |