LAX89LA114

NTSB accident investigation · North American AT-6 · Compton, CA · February 23, 1989

Accident · Minor injuriesLimited investigationFinal report
Date
February 22, 1989, 16:45 local (Feb 23, 1989, 00:45 UTC)
Place
Compton, CA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6972CNorth American AT-6
Weather
Visual (VMC) · Day
Status
Completed · report January 31, 1991
Report
Approved by Office Director
FAA report
19890222002399A
Case key
26340

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

Fatigue cracks that existed in an engine cylinder.

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(total) - mech failure/malfTakeoff - initial climb
Engine assembly,cylinder - fatigueCause
Forced landingDescent - emergency
In flight collision with objectDescent - emergency
Object - wire,transmissionFactor
On ground/water collision with objectLanding - roll
Object - poleFactor

Analysis

At the beginning of a local pleasure flight, just after takeoff, the engine experienced a loss of power. Wires were struck during a forced landing on a residential street. Inspection of the engine revealed that the number five cylinder was cracked in two parts. A metallurgical examination revealed that three separate fatigue cracks existed prior to the final break. Combustion by-products were noted in the cracks and on the outside of the cylinder in the area of the cracks.

Aircraft

Registration
N6972C
Reported as
North American AT-6
Category
Airplane
Serial number
90680
Airframe hours
7,024
Engine
P&W R-1340-AN-1, 600 horsepower, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Personal · Part 91
Registered owner
James K. Fox
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 1, 1988 · 13 hours before
Departed
CMT · Compton, CA
Airport
Compton, runway 25, 3,600 × 60 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
58
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
7,926 total · 652 in this make and model · 5,732 as pilot in command · 4 in the last 90 days · 2 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F

FAA reports on this event · 1

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