ATL90LA012

NTSB accident investigation · Cessna 172N · Knightdale, NC · October 24, 1989

Accident · Serious injuriesLimited investigationFinal report
Date
October 24, 1989, 01:00 local (05:00 UTC)
Place
Knightdale, NC
Injuries
1 serious, 2 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N737QGCessna 172N
Weather
Visual (VMC) · Night/dark
Status
Completed · report June 26, 1992
Report
Approved by Office Director
FAA report
19891024042119A
Case key
8170

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

The pilot's failure to maintain the proper glide path to the runway resulting in the airplane colliding with trees while making an approach to landing with no electrical power.

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.

In flight collision with objectApproach - vfr pattern - final approach
Electrical system,alternator - worn
Maintenance,overhaul - improperOther maintenance personnel
Electrical system,alternator - failure,total
Precautionary landing - not performedPilot in command
Electrical system - failure,total
Proper glidepath - not maintainedPilot in commandCause
Object - tree(s)
Go-around - attemptedPilot in command
In flight collision with objectDescent - emergency
Object - tree(s)
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - high vegetation

Analysis

Flt experienced alternator failure. Plt elected to cont flt to destination. About 20 minutes from destination, flt lost all electrical power. While making night visual approach with passenger holding flashlight on instrument panel, plt allowed airplane to descend too low resulting in collision with tree tops. Plt then attempted go- around even though pilot rated passenger stated runway was made after collision. When acft would not climb during go-around, it collided with trees and came to rest. Alternator failure was result of brush slip ring being damaged at overhaul resulting in premature wearing of brushes. Alternator had 57 hours since overhaul.

Aircraft

Registration
N737QG
Reported as
Cessna 172N
Category
Airplane
Serial number
17269587
Airframe hours
2,875
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Robert Scott Kellum
Registered owner
Topsail Air, Inc.
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
100 hour · September 14, 1989 · 38 hours before
Departed
MIV · Millville, NJ
Airport
W17 · Raleigh East, runway 1, 3,000 × 36 ft, asphalt

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
30
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
311 total · 32 in this make and model · 256 as pilot in command · 6 in the last 90 days · 6 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night/dark
Wind
110° at 5 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
46 °F, dew point 41 °F
Altimeter
30.00 inHg
Observed at
RDU, 20 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.