DEN99IA136

NTSB incident investigation · Beech 1900D · Denver, CO · August 5, 1999

Incident · No injuriesIncident investigationFinal report
Date
August 5, 1999, 10:55 local (16:55 UTC)
Place
Denver, CO
Injuries
22 uninjured
Phase of flight
Taxi
Aircraft
N101UXBeech 1900DN91KABeech C90A
Weather
Instrument (IMC) · Day
Status
Completed · report November 30, 2000
Report
Approved by Office Director
FAA report
19990805025949I
Case key
46914

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

The NTSB’s determination of the probable cause, and any contributing factors.

See cause/factor narrative for DEN 99-I-A136A.

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.

Analysis

See narrative for DEN 99-I-A136A.

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.

Factual narrative

See Narrative for DEN 99-I-A136A.

The factual narrative428 words

On August 5, 1999, at 1059 mountain daylight time, a Beech 1900D, N101UX, operated by Great Lakes Aviation and doing business as United Express, and a Beech C90A, N91KA, owned and operated by its pilot, made contact with each other as both airplanes were taxiing at Denver International Airport, Denver, Colorado. Both airplanes sustained minor damage. There were no injuries to the airline transport rated captain, commercial rated first officer, and 19 passengers aboard N101UX, or to the private pilot aboard N91KA. Instrument meteorological conditions prevailed, and the pilots of both airplanes had filed IFR flight plans. N101UX was being operated as flight 6326, scheduled domestic passenger service between Riverton, Wyoming, and Denver, Colorado, under Title 14 CFR Part 121. N91KA was being operated as a business flight under Title 14 CFR Part 91. The flight of N101UX originated approximately 0900. The flight of N91KA had not yet originated.

An incident report was submitted by the company and signed jointly by the captain and first officer. The report indicated that the first officer was flying the airplane. During the approach and landing, neither she 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. The statement indicates that 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. According to the statement, it was then that they were told to yield to the approaching traffic.

According to the incident report submitted by the pilot of N91KA, he had been cleared to taxi from Signature Aviation (a fixed base operator at the airport) 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. He heard a noise from the rear of the airplane and suspected he had been struck by the Beech 1900D.

Postincident inspection disclosed the winglet on N101UX was cracked. The outboard elevator cap on N91KA was bent, and there was a dent in a fairing.

Although instrument meteorological conditions prevailed at the time of the incident, surface visibility was 3 statute miles in mist.

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.

On ground/water collision with objectTaxi - from landing
Object - aircraft moving on groundFactor
Atc clearance - exceededFlightcrewCause
Visual lookout - inadequateFlightcrewCause
Visual lookout - inadequatePilot of other aircraftCause
On ground/water collision with objectTaxi - to takeoff
Object - aircraft moving on groundFactor
Visual lookout - inadequatePilot in commandCause
Atc clearance - exceededFlightcrewCause
Visual lookout - inadequateFlightcrewCause

Aircraft · 2

Registration
N101UX
Reported as
Beech 1900D
Category
Airplane
Serial number
UE-101
Airframe hours
13,674
Engine
P&W PT6A-67D, 1,279 horsepower, turbo prop
Damage
Minor damage
Flight
Part 121
Registered owner
Great Lakes Aviation
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · July 29, 1999 · 99 hours before
Departed
RIW · Riverton, WY
Destination
DEN
Flight plan
IFR
Airport
DEN · Denver International, runway 35L, 12,000 × 150 ft, concrete

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.

Registration
N91KA
Reported as
Beech C90A
Category
Airplane
Serial number
LJ-1232
Engine
P&W PT6A-21, 550 horsepower, turbo prop
Damage
Minor damage
Flight
Business · Part 91
Registered owner
Sun Desert Enterprises
Airworthiness certificate
Standard, Normal
Departed
DEN
Destination
E15 · Graham, TX
Flight plan
IFR
Airport
DEN · Denver International

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N101UX
Age
36
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
2,700 total · 1,200 in this make and model · 1,900 as pilot in command
Role
Pilot, aircraft N91KA
Age
54
Certificate
Private
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,190 total · 100 in this make and model · 3,026 as pilot in command · 50 in the last 90 days · 20 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Wind
290° at 6 knots
Visibility
1.5 statute miles
Lowest ceiling
600 ft broken
Temperature
61 °F, dew point 59 °F
Altimeter
30.00 inHg
Observed at
DEN

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.