DEN85IA016

NTSB incident investigation · Beech 99A · Fort Morgan, CO · October 21, 1984

Incident · No injuriesIncident investigationFinal report
Date
October 21, 1984, 15:12 local (21:12 UTC)
Place
Fort Morgan, CO
Injuries
6 uninjured
Damage
Minor damage
Phase of flight
Enroute
Aircraft
N1921TBeech 99A
Weather
Instrument (IMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19841021076049I
Case key
16578

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

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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
Weather condition - carburetor icing conditions
Weather condition - low ceiling
Compressor assembly,blade - fatigueCause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterLanding
Nacelle/pylon - cropFactor

Analysis

Captain shutdown rt engine in-flight due to a surging and vibration problem. The aircraft was in moderate icing conditions at the time of the engine shutdown. The captain was unable to maintain altitude and an emergency landing was made in a corn field. Post incident examination of the rt engine revealed that a compressor turbine blade had failed in fatigue, causing additional damage to the remaining blades. Approximately 1 1/2 to 2 inches of ice were found on various unprotected areas of the aircraft.

Aircraft

Registration
N1921T
Reported as
Beech 99A
Category
Airplane
Serial number
U-128
Airframe hours
20,030
Engine
P&W PT6A-28, 550 horsepower, turbo prop
Damage
Minor damage
Flight
Part 135
Operator
Pioneer Airways, Inc.
Registered owner
Pioneer Airways, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · October 15, 1984 · 31 hours before
Departed
DEN · Denver, CO
Destination
SNY · Sydney, NE
Flight plan
IFR

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
43
Certificates
Airline transport, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
8,790 total · 18 in this make and model · 8,417 as pilot in command

Weather

Conditions
Instrument (IMC) · Day
Wind
7° at 7 knots
Visibility
10 statute miles
Lowest ceiling
10,000 ft broken
Temperature
28 °F, dew point 70 °F
Altimeter
30.00 inHg
Observed at
AKO

FAA reports on this event · 1

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