NYC91LA113

NTSB accident investigation · Grumman American AA-5A · Pleasant Valley, NY · April 14, 1991

Accident · Minor injuriesLimited investigationFinal report
Date
April 14, 1991, 15:30 local (19:30 UTC)
Place
Pleasant Valley, NY
Injuries
1 minor, 3 uninjured
Phase of flight
Enroute
Aircraft
N9763UGrumman American AA-5AN5232KCessna 172P
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 1993
Report
Approved by Office Director
Case key
36909

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 failure of the pilot of N5232K to maintain visual contact and separation with N9763U.

The failure of the pilot of N5232K to maintain visual contact and separation with N9763U.

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.

Midair collisionCruise
Formation flying - attemptedPilot in command
Visual lookout - inadequatePilot in command
Visual lookout - not maintainedPilot of other aircraftCause
Compensation for wind conditions - not maintainedPilot of other aircraftCause
Midair collisionDescent
Formation flying - attemptedPilot in command
Visual lookout - not maintainedPilot in command
Clearance - not maintainedPilot in commandCause

Analysis

The two pilots agreed to fly together and keep in radio contact. After takeoff and flying in a northerly direction, the Cessna 172 pilot said he turned to the west and was struck by the Grumman AA5A after 2 3 minutes. A ground witness and a witness on board the Grumman AA5A saw the Cessna 172 behind the Grumman. The spinner of the Cessna 172 struck the left aileron of the Grumman AA5A, and the right wing of the Cessna struck the horizontal stabilizer and deformed the rudder, elevator, and aft fuselage of the Grumman AA5A. The Grumman AA5A made a forced landing with minimal flight control in a wooded area, and the Cessna 172 landed at a nearby airport.

The two pilots agreed to fly together and keep in radio contact. After takeoff and flying in a northerly direction, the Cessna 172 pilot said he turned to the west and was struck by the Grumman AA-5A after 2-3 minutes. A ground witness and a witness on board the Grumman saw the Cessna 172 behind the Grumman. The spinner of the Cessna 172 struck the left aileron of the Grumman, and the right wing of the Cessna struck the horizontal stabilizer and deformed the rudder, elevator, and aft fuselage of the Grumman AA-5A. The Grumman made a forced landing with minimal flight control in a wooded area, and the Cessna 172 landed at a nearby airport.

Aircraft · 2

Registration
N9763U
Reported as
Grumman American AA-5A
Category
Airplane
Serial number
0163
Engine
Lycoming O-320-E2G, 150 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Lesley A. Lyons
Registered owner
John T. Lyons
Airworthiness certificate
Standard, Normal
Last inspection
Unknown · January 2, 2000
Departed
N69 · Stormville, NY

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.

Registration
N5232K
Reported as
Cessna 172P
Category
Airplane
Serial number
17274024
Engine
Lycoming O-320-D2J, 160 horsepower, reciprocating
Damage
Minor damage
Flight
Personal · Part 91
Operator
James S. Weeks
Registered owner
James S. Weeks
Last inspection
Unknown · January 2, 2000
Departed
N69 · Stormville, NY

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N9763U
Age
35
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Flight hours
199 total · 128 in this make and model · 91 as pilot in command · 9 in the last 90 days · 4 in the last 30 days
Role
Pilot, aircraft N5232K
Age
32
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Flight hours
554 total · 554 in this make and model · 473 as pilot in command · 22 in the last 90 days · 7 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 12 knots
Visibility
30 statute miles
Lowest ceiling
25,000 ft broken
Temperature
55 °F, dew point 34 °F
Altimeter
30.00 inHg
Observed at
POU, 1 nm away

FAA reports on this event · 2

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