ATL88MA048

NTSB accident investigation · Beech C90 · Beaufort, SC · November 30, 1987

Accident · FatalMajor investigationFinal report
Date
November 30, 1987, 09:46 local (14:46 UTC)
Place
Beaufort, SC
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N4463WBeech C90
Weather
Visual (VMC) · Day
Status
Completed · report July 12, 1991
Report
Approved by Office Director
FAA report
19871130068499A
Case key
7818

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.

Airframe/component/system failure/malfunctionClimb
Reason for occurrence undeterminedCause
Design stress limits of aircraft - exceeded
Wing - overload
Wing - separation
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - water

Analysis

At 0938, while clbg thru 9000', the plt was clrd to clb to FL 210. Aprx 10 min later, the ATC ctlr noted the acft's mode c rtrn wasn't being displayed on his scope. He tried to adz the plt, but couldn't establish radio contact. The acftbroke up in flt & the wreckage was fnd submerged in a creek & on marshland. A large piece of the rgt outboard wing panelwas fnd abt 2 mi east of the main wreckage. The rgt eng was fnd aprx 800' to 1200' NE of the main wreckage in 4' of wtr. There was evidence the rgt outboard wing had failed fm upward & aft overload. No pre-acdnt mech failure or malfunction was fnd that would have resulted in an in-flt break-up. Radar data showed the acft was clbg at 115 KTS & 1100'/MIN; at aprx 16,000' MSL, rate of clb slowed to aprx 750'/MIN, then increased to 1200'/MIN. Peak alt was aprx 18,200'. Acft thenentered a steep dscnt & crashed. At the aprx time & place of peak alt, primary targets appeared on radar & remained for svrl mins. Organic mtrl was fnd on left eng inlet screen, but source was not dtrmd. Acdnt occurred along bird flyway.

Aircraft

Registration
N4463W
Reported as
Beech C90
Category
Airplane
Serial number
LJ-633
Airframe hours
2,092
Engine
P&W PT6A-20A, 550 horsepower, turbo prop
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Joseph R. Leon
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · January 15, 1987 · 191 hours before
Departed
SAV · Savannah, GA
Destination
PNE · Philadelphia, PA
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
66
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Toxicology
Performed
Flight hours
14,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 9 knots
Visibility
7 statute miles
Lowest ceiling
7,000 ft broken
Temperature
50 °F, dew point 39 °F
Altimeter
29.00 inHg
Observed at
NBC, 5 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.