DEN93LA013

NTSB accident investigation · Mitsubishi MU-2B-25 · Broomfield, CO · November 21, 1992

Accident · No injuriesLimited investigationFinal report
Date
November 20, 1992, 18:40 local (Nov 21, 1992, 01:40 UTC)
Place
Broomfield, CO
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N473FWMitsubishi MU-2B-25
Weather
Instrument (IMC) · Night/dark
Status
Completed · report September 14, 1993
Report
Approved by Office Director
FAA report
19921120047599A
Case key
18263

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

A failure by FBO personnel to properly connect the nose wheel torque link after towing the aircraft.

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.

Loss of control - on ground/waterTakeoff - roll/run
Weather condition - snow
Landing gear,steering system - disconnectedCause
Proper assistance - not performedFbo personnelCause
Nose gear collapsedTakeoff - aborted
Terrain condition - snow covered

Analysis

In preparation for a cross country flight with takeoff occurring during a snow storm, the aircraft was loaded in the hangar and towed out by FBO personnel. Following the tow, the torque link was not properly connected and separated during the takeoff run. Due to a loss of nose wheel steering, the takeoff was aborted. The aircraft departed the side of the runway during the abort and the nose wheel was sheared off causing damage to both engines, wings, the fuselage, and landing gear.

Aircraft

Registration
N473FW
Reported as
Mitsubishi MU-2B-25
Category
Airplane
Serial number
269
Airframe hours
3,406
Engine
Garrett TPE331-6, 725 horsepower, turbo prop
Damage
Substantial damage
Flight
Business · Part 91
Operator
Wayne C. Muhler, doing business as Muhl Air
Registered owner
Wayne C. Muhler
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · September 23, 1991 · 60 hours before
Departed
BJC
Destination
LAS · Las Vegas, NV
Flight plan
IFR
Airport
BJC · Jefferson County, runway 29, 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
44
Certificates
Flight instructor, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
13,753 total · 4,200 in this make and model · 1,346 as pilot in command · 59 in the last 90 days · 31 in the last 30 days

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
10° at 12 knots
Temperature
32 °F, dew point 19 °F
Altimeter
29.00 inHg
Observed at
BJC, 1 nm away

FAA reports on this event · 1

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