- Date
- May 23, 1991, 20:25 local (May 24, 1991, 02:25 UTC)
- Place
- Denver, CO
- Injuries
- 1 uninjured
- Damage
- No damage
- Phase of flight
- Approach
- Aircraft
- N81TRAero Commander 690C
- Weather
- Visual (VMC) · Dusk
- Status
- Completed · report May 5, 1993
- Report
- Approved by Office Director
- FAA report
- 19910523031649I
- Case key
- 18043
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Probable cause
Fatigue failure of flap cable.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
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.
Aircraft
- Registration
- N81TR
- Reported as
- Aero Commander 690C
- Category
- Airplane
- Serial number
- 11690
- Engine
- Garrett TPE331-5-254K, 717 horsepower, turbo prop
- Damage
- No damage
- Flight
- Part 135
- Operator
- Casper Air Service
- Registered owner
- Casper Air Service
- Departed
- CYS · Cheyenne, WY
- Destination
- DEN · Denver, CO
- Flight plan
- Unknown
- Airport
- DEN · Stapleton International, runway 18, 7,700 × 150 ft, asphalt
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 35
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Flight hours
- 3,215 total · 380 in this make and model · 3,081 as pilot in command · 70 in the last 90 days · 35 in the last 30 days · 2 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Dusk
- Wind
- 180° at 5 knots
- Visibility
- 15 statute miles
- Lowest ceiling
- None
- Temperature
- -0 °F, dew point -0 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N81TR · 1
Matched to the same aircraft by N-number and date.