LAX89FA296

NTSB accident investigation · Grumman AA-5B · California City, CA · September 6, 1989

Accident · FatalField investigationFinal report
Date
September 6, 1989, 10:09 local (17:09 UTC)
Place
California City, CA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Initial climb
Aircraft
N28493Grumman AA-5B
Weather
Visual (VMC) · Day
Status
Completed · report July 22, 1992
Report
Approved by Office Director
FAA report
19890906033909A
Case key
26246

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

Failure of the student pilot to maintain a proper airspeed while maneuvering for an emergency landing. Factors in the accident were the partial engine power loss, which was due to improper maintenance procedures, the student pilot's inexperience, the strong cross wind, and the high density altitude.

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) - nonmechanicalTakeoff - initial climb
Ignition system,spark plug - wornFactor
Maintenance,replacement - improperOther maintenance personnelFactor
Forced landingDescent - emergency
Weather condition - crosswindFactor
Planned approach - improperPilot in commandFactor
Wrong runway - selectedPilot in commandFactor
Compensation for wind conditions - inadequatePilot in commandFactor
Lack of total experiencePilot in commandFactor
Loss of control - in flightManeuvering - turn to landing area (emergency)
Airspeed(vs) - not maintainedPilot in commandCause
Stall/mush - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The student pilot on her second solo cross counrty experienced a partial loss of engine power during the initial climb. She made three attempts to land on the takeoff runway, each time flying a left traffic pattern that was lower than the preceding pattern. Ground witnesses saw the aircraft fly patterns that were 'low, close and with tight base to final turns.' On each base to final turn, the aircraft overshot the turn due to a strong left cross wind. During the third base to final turn, the witnesses saw the aircraft enter a very steep bank, stall, and hit the ground on the left wing tip. A post crash fire destroyed the aircraft. No evidence of a catastrophic engine failure was found. Four of the spark plugs failed a pressure chamber test, with three of them showing gaps in excess of .022' (normal gap is .016) and were very worn. Review of the maintenance records showed that the maintenance facility only replaced spark plugs on a one for one basis instead of in complete sets.

Aircraft

Registration
N28493
Reported as
Grumman AA-5B
Category
Airplane
Serial number
AA5B-0545
Airframe hours
4,821
Engine
Lycoming O-360-A4K, 180 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Instructional · Part 91
Operator
Sussex Aviation
Registered owner
Ronald A. La Rue
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 1, 1989 · 32 hours before
Departed
L71
Destination
VNY · Van Nuys, CA
Flight plan
VFR
Airport
L71 · Calif City Muni, runway 24, 6,035 × 55 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
51
Certificate
Student
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Toxicology
Performed
Flight hours
93 total · 93 in this make and model · 12 as pilot in command · 41 in the last 90 days · 16 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 18 knots
Visibility
75 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 30 °F
Altimeter
29.00 inHg
Observed at
WJF, 27 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.