LAX06CA165

NTSB accident investigation · Cessna 150M · Green Valley, AZ · May 7, 2006

Accident · Minor injuriesData collectionFinal report
Date
May 7, 2006, 08:45 local (15:45 UTC)
Place
Green Valley, AZ
Injuries
2 minor
Damage
Destroyed
Phase of flight
Approach
Aircraft
N66705Cessna 150M
Weather
Visual (VMC) · Day
Status
Completed · report August 29, 2006
Report
Approved by Office Director
Parties
Ferderal Aviation Administration
FAA report
20060507008059A
Case key
63653

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 certified flight instructor to retract the flaps to the proper go-around setting and to attain/maintain an adequate airspeed, which led to a stall/mush.

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 control - in flightGo-around (vfr)
Checklist - not complied withPilot in command(cfi)Cause
Raising of flaps - not performedPilot in command(cfi)Cause
Airspeed - not obtained/maintainedPilot in command(cfi)Cause
Stall/mush - encountered
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - berm

Analysis

The airplane veered off the runway during a go-around and descended to a collision with a dirt berm on the airport property. The certified flight instructor (CFI) and student were returning to the airport for a full stop landing. The CFI took control of the airplane on final and setup the configuration for landing with 30 degrees of flaps. A gust of wind caused them to drift off the centerline of the runway. The landing was not assured and the CFI committed them to a go-around. He said he did not raise the flaps because the airplane was continuing to descend. When the flight instructor knew a climb out was not possible, he kept the wings level and pitched the nose to the horizon for best airspeed. When a touchdown on the runway was no longer possible he banked to the left and impacted a dirt pile. The procedures written in the Pilot Operating Handbook state that the wing flap setting should be reduced to 20 degrees immediately after full power is applied on a go-around.

Factual narrative

On May 7, 2006, about 0845 mountain standard time, a Cessna 150M, N66705, landed off the runway and collided with terrain at Green Valley, Arizona. The owner was operating the airplane under the provisions of 14 CFR Part 91. The certified flight instructor (CFI), and the student pilot, sustained minor injuries; the airplane sustained substantial damage. The local instructional flight departed Ruby Star Airport, Green Valley, Arizona, about 0700. Visual meteorological conditions prevailed, and no flight plan had been filed.

The CFI submitted a written report. They were returning to the airport for a full stop landing. The student pilot had control of the airplane. He turned the base leg of the traffic pattern early and at a high altitude. The CFI assisted the student in losing altitude prior to turning final. The CFI took control of the airplane on final and configured the airplane for landing. He felt that the attitude was good and the landing was assured. He stated that immediately after lowering 30 degrees of flaps a gust of wind caused them to drift off the centerline of the runway.

The CFI did not think a safe landing was assured and committed them to a go-around procedure. He executed the go-around by applying full power, enriching the mixture, and turning the carburetor heat off. He waited for the engine rpm to rise and kept his hand on the flap position lever. He waited to bring the flaps to 25 degrees until the lift increased. The CFI said he never got the positive rate of climb that he was waiting for. He never raised the flap lever due to the sink rate of the airplane and their close proximity to the ground. Due to rising terrain and low performance of the airplane, they were never able to execute a climb out. The instructor kept the wings level and pitched for the horizon for best airspeed results. He felt that he was past runway landing possibilities. He banked to the left and impacted a dirt pile before stopping suddenly in the brush.

The pilot operating handbook states that during a go-around procedure, the wing flap setting should be reduced to 20 degrees immediately after full power is applied. When the airplane has reached a safe airspeed, the flaps should then be slowly retracted to the full up position.

The CFI stated that the airplane and engine had no mechanical failures or malfunctions during the flight.

Aircraft

Registration
N66705
Reported as
Cessna 150M
Category
Airplane
Serial number
15076222
Engine
Continental O-200A, reciprocating
Damage
Destroyed
Flight
Instructional · Part 91
Registered owner
Daniel D. Stogsdill
Airworthiness certificate
Standard, Utility
Departed
14AZ · Green Valley, AZ
Destination
14AZ · Green Valley, AZ
Airport
14AZ · Ruby Star, runway 06, 4,300 × 50 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
28
Injuries
Minor
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2
Seat
Right
Flight hours
1,664 total · 204 in this make and model · 1,519 as pilot in command · 57 in the last 90 days · 30 in the last 30 days · 2 in the last 24 hours
Role
Student pilot
Age
48
Injuries
Minor
Certificate
Student
Medical
Class 3
Seat
Left
Flight hours
10 total · 10 in this make and model · 10 in the last 90 days · 10 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 27 °F
Altimeter
29.95 inHg
Observed at
TUS, 16 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.