CHI88MA026

NTSB accident investigation · Beech 200 · Jefferson, WI · November 16, 1987

Accident · FatalMajor investigationFinal report
Date
November 16, 1987, 08:19 local (14:19 UTC)
Place
Jefferson, WI
Injuries
8 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N334DPBeech 200
Weather
Visual (VMC) · Day
Status
Completed · report July 29, 1992
Report
Approved by Office Director
Safety recommendations
Yes
FAA report
19871116064999A
Case key
14172

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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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 - in flightDescent
Reason for occurrence undeterminedCause
Airframe/component/system failure/malfunctionDescent - uncontrolled
Wing - overload
Design stress limits of aircraft - exceededCause
Wing - separation
Cooling system,cowling - separation
In flight collision with terrain/waterDescent - uncontrolled

Analysis

While cruising abv frzg lvl at 12,000', the flt was clrd to dscnd & maint 9000'. Abt 1-1/2 min ltr, the flt declared a mayday (emergency). Radio & radar ctc were lost & the acft crashed in a nr vertical dscnt. Radar data showed that after starting a dscnt, the acft entered a left/descending mnvr. Subsequently, the left outboard wing panel & both engs sepd in flt. The last transponder reply was at 2800'. An exam revealed the left wing panel had sepd fm positive overload. No fatigue or pre-existing crack was fnd on any fracture area. Also, dmg was fnd on the left eng's inboard cowling that matched dmg on the vertical & rgt horizontal stabilizers; however, sequence of cowling sepn was not verified. The sepd wing panel & parts of the eng cowling were found about 3/4 mi fm the main wreckage. An NTSB trajectory study indcd an in-flt sepn occurred at an alt of aprx 5600' as acft was hdg se in a 50 to 70 deg dive. Elev trim indcr was fnd with a full nose up indcn. Both plts were instrument rated.

Aircraft

Registration
N334DP
Reported as
Beech 200
Category
Airplane
Serial number
BB-1188
Airframe hours
1,050
Engine
P&W PT6A-42, 850 horsepower, turbo prop
Damage
Destroyed
Flight
Business · Part 91
Registered owner
Danpar Aviation, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · October 23, 1987 · 14 hours before
Departed
CGX · Chicago, IL
Destination
C85 · Baraboo, WI
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
59
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Toxicology
Performed
Flight hours
18,000 total · 3,000 in this make and model · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 14 knots
Visibility
5 statute miles
Lowest ceiling
2,300 ft overcast
Temperature
48 °F, dew point 43 °F
Altimeter
29.00 inHg
Observed at
MSN, 22 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.