Beech 1900D and Beech C90A incident near Denver, Colorado, August 5, 1999
On August 5, 1999 at about 4:55 pm local time, 2 aircraft, Beech 1900D (N101UX) and Beech C90A (N91KA), were involved in the same incident near Denver, Colorado (Denver International airport). No one was hurt; 22 people were on board or involved. The weather was instrument conditions (cloud, fog or low visibility).
The NTSB's probable cause their words, unchanged
The flight crew exceeding the limits of their ATC clearance, and the failure of both flight crews to maintain adequate visual lookouts. A factor was the other aircraft taxiing on the ground.
See cause/factor narrative for DEN 99-I-A136A.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 5, 1999 · about 4:55 pm local time
- Place
- Denver, Colorado · Denver International · map
- Type
- Incident · collision on the ground
- Injuries
- No one was hurt; 22 people were on board or involved.
- Weather
- instrument conditions (cloud, fog or low visibility)
- Aircraft 1
- Beech 1900D · all 1900Ds on the register
- Registration
- N101UX · no longer on the register · serial UE-101
- Damage
- Minor damage
- Flight
- Flight of an unrecorded kind · scheduled airline rules (Part 121)
- Aircraft 2
- Beech C90A · all C90As on the register
- Registration
- N91KA · registry record · serial LJ-1232
- Damage
- Minor damage
- Flight
- Business flight · general aviation rules (Part 91)
The NTSB's narrative for the Beech 1900D final · quoted from the NTSB record
During the approach and landing, neither the first officer nor the captain observed any traffic on taxiway M[ike]. After landing of runway 35L[eft], the local controller instructed the crew to 'exit [on] either high speed taxiway,' and to contact ground control. Because of the long landing roll and low exit speed, the first officer elected to exit the runway on high speed turnoff M6. After crossing the 'Hold Short' lines, the captain contacted ground control and was given instructions to 'taxi via Mike, enter the ramp, Bravo November, and give way to the King Air.' The captain then sighted the approaching Beech C90A, and maximum brakes were applied. The pilot of N91KA had been cleared to taxi from the general aviation ramp to runway 8 via taxiway M. As he passed a high speed exit, he saw the Beech 1900D out the right cockpit window and heard the ground controller tell the pilot to yield.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The NTSB's narrative for the Beech C90A final · quoted from the NTSB record
See narrative for DEN 99-I-A136A.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record for the Beech 1900D from the NTSB's investigation tables, in plain English
Pilot
- Certificate: airline transport pilot, commercial pilot
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 2,700 hours in all; 1,200 in this make and model; 1,900 as pilot in command
- Medical certificate: Class 1 (valid medical--no waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 13,674 hours
- Last inspection: continuous airworthiness programme, July 29, 1999; 99 hours since
- Maximum gross weight: 16,950 lb
- Seats: 21
- Landing gear: retractable
- Engine: P&W PT6A-67D (turboprop); 0 hours total
The flight
- Departed from: RIW Riverton WY at 3:00 pm
- Destination: DEN
- Flight plan: IFR
- Runway 35L, 12,000 ft by 150 ft
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 290° at 6 knots
- Visibility: 1.5 statute miles
- Sky: broken clouds at 600 ft; not recorded
- Temperature: 61°F (16°C), dew point 59°F (15°C)
- Altimeter: 30.00 inHg
- Observation at 5:00 pm from DEN
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 2 | |||
| Passengers | 19 |
The factual record for the Beech C90A from the NTSB's investigation tables, in plain English
Pilot
- Certificate: private
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 3,190 hours in all; 100 in this make and model; 50 in the last 90 days; 20 in the last 30 days; 3,026 as pilot in command
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Last inspection: approved inspection programme
- Maximum gross weight: 10,100 lb
- Seats: 8
- Landing gear: retractable
- Engine: P&W PT6A-21 (turboprop); 0 hours total
The flight
- Departed from: DEN
- Destination: E15 Graham TX
- Flight plan: IFR
- Runway 0
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
About this page
Everything above comes from the NTSB's public accident database: the narrative, probable cause and findings are the NTSB's own words, and the coded tables behind its report (pilot, aircraft, flight, weather, injuries, sequence of events) are written out in plain English. Pilots' ages, home towns and medical details are left out on purpose. The documents and photographs are the NTSB's docket, the folder of records gathered during the investigation, shown as the NTSB released them (the NTSB redacts some personal details first) and listed under the NTSB's own titles. This site's own text never names pilots, passengers or anyone else involved. A preliminary report describes what is known soon after the event and can change; the final report, with the probable cause, usually follows one to two years later and this page is refreshed when it does. Case number DEN99IA136.