MKC89LA187

NTSB accident investigation · Beech V35B · Concord, AR · August 18, 1989

Accident · No injuriesLimited investigationFinal report
Date
August 18, 1989, 14:00 local (19:00 UTC)
Place
Concord, AR
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N699TBeech V35B
Weather
Visual (VMC) · Day
Status
Completed · report June 18, 1990
Report
Approved by Office Director
FAA report
19890818033169A
Case key
34855

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 installation of the alternator wiring harness by the pilot/owner which resulted in chafed wiring and a subsequent electrical fire. The uneven terrain was a contributing factor.

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.

FireClimb - to cruise
Electrical system,electric wiring - chafedCause
Maintenance,installation - improperPilot in commandCause
Electrical system,electric wiring - fireCause
Forced landingDescent - emergency
In flight collision with terrain/waterLanding
Terrain condition - rough/unevenFactor
Gear collapsedLanding
Landing gear - overload

Analysis

The pilot/owner said that while climbing through 9000 ft MSL for 10,000 ft MSL, on an IFR flight plan, he smelled an electrical odor. The cabin began to fill with dense smoke, so he shut off all electrical switches. An emergency descent was made. During the descent, the smoke was substantially cleared from the cabin. The landing gear was extended by using emergency procedures. While landing on rolling terrain, the gear collapsed & the acft was damaged. There was no continuation of fire on the ground. A post-acdnt investigation revealed the owner had improperly installed an alternator wiring harness, which rubbed on the noise suppressor. After it rubbed thru the insulation, an electrical fire erupted.

Aircraft

Registration
N699T
Reported as
Beech V35B
Category
Airplane
Serial number
9301
Airframe hours
1,250
Engine
Continental IO-520-B/BA, 285 horsepower, reciprocating
Damage
Substantial damage
Fire
In-Flight
Flight
Personal · Part 91
Operator
Graebner, Walter D.
Registered owner
Graebner, Walter D
Airworthiness certificate
Standard, Normal
Departed
OLV · Olive Branch, MS
Destination
ROG · Rogers, AR
Flight plan
IFR
Airport
NONE

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
64
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
17,000 total · 1,000 in this make and model · 16,000 as pilot in command · 50 in the last 90 days · 30 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
210° at 5 knots
Visibility
5 statute miles
Lowest ceiling
8,000 ft broken
Temperature
90 °F, dew point -0 °F

FAA reports on this event · 1

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