- Date
- April 24, 1998, 14:05 local (20:05 UTC)
- Place
- Broomfield, CO
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N690ESRockwell 690B
- Weather
- Visual (VMC) · Not reported
- Status
- Completed · report February 15, 2001
- Report
- Approved by Office Director
- FAA report
- 19980424013309A
- Case key
- 20587
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
Failure of the flight instructor to maintain adequate supervision, and failure of the pilot receiving instruction to maintain directional control that was lost for reasons undetermined. A factor was the concrete culvert.
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
The pilot-owner said that after landing, he brought the condition levers from ground idle to reverse. The airplane veered to the right, as if 'one engine was developing more power than the other.' The instructor pilot took control and attempted to straighten the airplane but it departed the runway and struck a concrete culvert. The left landing gear collapsed, and the tip from one of the left propeller blades penetrated the pressure vessel. The right propeller and right and nose landing gears also sustained damage. During repairs, no abnormalities were found with either the propeller, pitch, or Bendix controllers.
Factual narrative
On April 24, 1998, at 1405 mountain daylight time, a Rockwell International 690B, N690ES, was substantially damaged during landing at Broomfield, Colorado. The private certificated pilot receiving instruction and the airline transport rated flight instructor were not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the instructional flight being conducted under Title 14 CFR Part 91. The flight originated at Boulder, Colorado, approximately 1330.
According to the pilot-owner, he had recently purchased the airplane and had contracted with the instructor pilot to give him instruction and a checkout in the airplane. Although he was multiengine rated and had owned other multiengine airplanes, this was his first experience with a turboprop airplane.
The two pilots flew the airplane from Oklahoma City, Oklahoma, to Boulder, Colorado, where they landed and had lunch. After lunch, they flew to the Jefferson County (Jeffco) Airport, Broomfield, Colorado, to make some full stop landings. The first two landings were without incident. The pilot-owner said that after the third landing, he brought the condition levers from ground idle to reverse. The airplane veered to the right and departed the runway. The instructor pilot took control and attempted to straighten the airplane, but it struck a concrete culvert. The pilot-owner said that it appeared that "one engine was developing more power than the other. This could be the result of a faulty propeller governor, the pitch controller, or possibly the Bendix controller."
According to an FAA inspector who examined the airplane, the left landing gear collapsed, and the tip from one of the left propeller blades penetrated the pressure vessel. The right propeller and right and nose landing gears also sustained damage.
The airplane was ferried back to Commander Aircraft at Downtown Airpark in Oklahoma City, Oklahoma, for repairs. According to the company's director of maintenance, no abnormalities were found with either the propeller, pitch, or Bendix controllers.
Aircraft
- Registration
- N690ES
- Reported as
- Rockwell 690B
- Category
- Airplane
- Serial number
- 11355
- Airframe hours
- 6,780
- Engine
- Garrett TPE-331-5-251, 717 horsepower, turbo prop
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Registered owner
- William S. Raab
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · November 1, 1997 · 48 hours before
- Departed
- F29 · Oklahoma City, OK
- Destination
- BJC
- Airport
- BJC · Jeffco, runway 11L, 9,000 × 100 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
- 62
- Certificates
- Flight instructor, Airline transport
- Airplane ratings
- Single-engine land, Multi-engine land
- Instrument ratings
- Airplane, Helicopter
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Right
- Flight hours
- 20,000 total · 550 in this make and model · 19,600 as pilot in command
Weather
- Conditions
- Visual (VMC) · Not reported
- Wind
- 240° at 12 knots
- Visibility
- 60 statute miles
- Lowest ceiling
- 20,000 ft broken
- Temperature
- 75 °F, dew point 23 °F
- Altimeter
- 29.00 inHg
- Observed at
- BJC
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.