DEN91FA061

NTSB accident investigation · Cessna T210M · Littleton, CO · April 19, 1991

Accident · Serious injuriesField investigationFinal report
Date
April 19, 1991, 08:40 local (14:40 UTC)
Place
Littleton, CO
Injuries
2 serious
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N761CMCessna T210M
Weather
Instrument (IMC) · Day
Status
Completed · report March 2, 1993
Report
Approved by Office Director
FAA report
19910419011629A
Case key
18019

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

Improper reassembly of the overhauled turbocharger by maintenance personnel, and the pilot's improper use of the mixture control and boost pump. Factors related to the accident were: the adverse weather conditions and unsuitable terrain in the emergency landing area.

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 engine power(total) - mech failure/malfClimb - to cruise
Exhaust system,turbocharger - assemblyCause
Maintenance,overhaul - improperOther maintenance personnelCause
Mixture - improper use ofPilot in commandCause
Fuel boost pump selector position - improper use ofPilot in commandCause
Forced landingDescent - emergency
In flight collision with objectApproach - vfr pattern - final approach
Weather condition - low ceilingFactor
Weather condition - fogFactor
Weather condition - obscurationFactor
Terrain condition - none suitableFactor
Object - wire,staticFactor
Object - tree(s)Factor
Object - residenceFactor

Analysis

The turbocharger failed during climb to cruise and the pilot improperly selected high boost and full rich mixture, causing a total loss of power. IMC prevailed and the pilot was initially vectored towards a distant airport, then vectored towards a closer airstrip. The pilot made a forced landing on a residential street. The airplane collided with wires, trees, and a house, then burned. A post-accident examination of the turbocharger disclosed improper reassembly by the overhaul facility.

Aircraft

Registration
N761CM
Reported as
Cessna T210M
Category
Airplane
Serial number
21062150
Airframe hours
2,316
Engine
Continental TSIO-520-R-1A, 310 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Instructional · Part 91
Operator
Denver Air Center
Registered owner
Denver Air Center
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 15, 1990
Departed
BJC · Broomfield, CO
Destination
COS · Colorado Spring, CO
Flight plan
IFR

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
49
Certificates
Airline transport, Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
12,863 total · 100 in this make and model · 12,191 as pilot in command · 30 in the last 90 days · 10 in the last 30 days

Weather

Conditions
Instrument (IMC) · Day
Wind
Calm
Lowest ceiling
100 ft
Temperature
37 °F, dew point 36 °F
Observed at
APA, 13 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.

Other investigations on N761CM · 1

Matched to the same aircraft by N-number and date.