ATL83LA309

NTSB accident investigation · Cessna 172N · Birmingham, AL · August 3, 1983

Accident · No injuriesLimited investigationFinal report
Date
August 2, 1983, 19:50 local (Aug 3, 1983, 00:50 UTC)
Place
Birmingham, AL
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N738NVCessna 172N
Weather
Visual (VMC) · Dusk
Status
Completed
Report
Approved by Office Director
FAA report
19830802041349A
Case key
6152

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 engine power(partial) - nonmechanicalDescent - normal
Ignition system,spark plug - otherCause
Powerplant controls - improper use ofPilot in commandCause
In flight collision with objectApproach - vfr pattern - final approach
Light condition - duskFactor
Object - wire,transmissionFactor
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The instructor (CFI) reported the eng began missing when power was applied after practicing stalls. A decision was made to return to the arpt. Carburetor heat was applied & the throttle was retarded to descend. The mixture was in full rich. After a couple of minutes, the eng began running rough & losing power. Carburetor heat & the throttle were adjusted in an unsuccessful attempt to restore power. A decision was made to land on an unopened highway. During final apch, the acft struck a power line. Subsequently, it impacted the ground nose 1st. Aprx 10 gal of fuel was remaining. All but 1 spark plug was found oily & sooty. The eng was started & ran smoothly to 1200 RPM. It had 50 hrs of operation since overhaul. The plt handbook stated cruise should be at 65 to 75% power for 50 hrs or until oil consumption has been stopped. A champion spark plug publication stated wet, oily plugs may be caused by an eng still in a break-in period.

Aircraft

Registration
N738NV
Reported as
Cessna 172N
Category
Airplane
Serial number
17270116
Airframe hours
1,600
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Birmingham Flying Club
Registered owner
W. Charles Harmon
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 18, 1982 · 344 hours before
Departed
BHM · Birmingham, AL

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
24
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
976 total · 369 in this make and model · 855 as pilot in command · 237 in the last 90 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Dusk
Wind
180° at 5 knots
Visibility
10 statute miles
Lowest ceiling
10,000 ft broken
Temperature
79 °F, dew point 68 °F
Altimeter
30.00 inHg
Observed at
BHM, 7 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.