LAX03CA208

NTSB accident investigation · Cessna 172K · Overton, NV · June 22, 2003

Accident · No injuriesData collectionFinal report
Date
June 22, 2003, 12:00 local (19:00 UTC)
Place
Overton, NV
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N7342GCessna 172K
Weather
Visual (VMC) · Day
Status
Completed · report September 30, 2003
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20030622016129A
Case key
57283

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 student pilot's failure to maintain an adequate airspeed and his premature raising of the flaps during a go-around, which led to an inadvertent stall/mush. The flight instructor's inadequate supervision of the flight is also causal.

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)
Emergency procedure - simulatedPilot in command(cfi)
Raising of flaps - inadvertentDual studentCause
Pull-up - excessiveDual studentCause
Supervision - inadequatePilot in command(cfi)Cause
Airspeed - not maintainedDual studentCause
Stall/mush - inadvertentCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

During an attempted go-around from a simulated emergency landing, the airplane failed to achieve a positive climb rate and descended to ground impact. After full power was added in order to abort the simulated emergency landing at 200 feet agl, the student pitched the nose up and the airspeed began to decay as the airplane began sinking towards the terrain. The flaps, which had been in the full down position, were inadvertently retracted all at once, and a positive climb rate could not be established. The CFI attributed the accident to allowing the airplane to get too low and too slow. In their statements, both pilots agree that the engine responded normally and was generating full power, and that all flight controls functioned properly.

Factual narrative

On June 22, 2003, about 1200 Pacific daylight time, a Cessna 172K, N7342G, impacted terrain during an attempted go-around near Overton, Nevada. Silver Wing Aviation was operating the airplane under the provisions of 14 CFR Part 91. The certified flight instructor (CFI) pilot, the student pilot, and one passenger were not injured; the airplane sustained substantial damage. The instructional cross-country flight departed North Las Vegas Airport (VGT), Las Vegas, Nevada, at 1015, en route to Perkins Field Airport (U08), Overton. Visual meteorological conditions prevailed, and a flight plan had not been filed. The primary wreckage was at 36 degrees 46 minutes north latitude and 114 degrees 22 minutes west longitude.

According to a written statement submitted by the CFI, the throttle was reduced to idle at 5,000 feet mean sea level (msl) to simulate an engine power loss. The student set up an approach to a dirt road for his simulated emergency landing. Power was advanced several times during the descent to ensure that the engine would respond when the recovery was initiated. Because they were in an undeveloped, unpopulated area, the CFI allowed the student to continue his approach to an estimated altitude of 200 feet above ground level (agl). Airspeed was about 70 miles per hour (mph) and flaps were in the full down position. At that point, the CFI advised the student to do a go-around. The student added power while the CFI retracted the first 10 degrees of flaps. The student pitched the nose up but there was insufficient airspeed to establish a climb. An excessive sink rate began and the flaps were inadvertently retracted completely. The airplane continued to sink further and impacted terrain about 100 feet southeast of the intended landing road. It came to rest inverted about 75 feet after the point of initial ground contact.

In a subsequent interview, the CFI stated that he began "assisting the student" immediately after it was determined that the sink rate was excessive for the low altitude, but insists they were both responsible for controlling the airplane. He had retracted the first 10 degrees of flaps, and the student retracted the remainder.

The Safety Board investigator-in-charge (IIC) interviewed the student. He believed the CFI began controlling the airplane, but was unsure of when the switchover occurred. The student could not recall who had retracted the flaps.

According to both the student and the CFI, the CFI never communicated that he was going to take the controls. The engine had been operating properly and responded normally after full power was added during the go-around. During the flight, no problems with the flight controls were noted.

Both pilots attribute the accident to letting the airplane get too low and too slow.

Aircraft

Registration
N7342G
Reported as
Cessna 172K
Category
Airplane
Serial number
17259042
Airframe hours
3,160.9
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Silver Wing Aviation
Registered owner
Frank Schurr
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
100 hour · December 31, 2002
Departed
KVGT · North Las Vegas, NV
Destination
U08 · Overton, NV
Airport
U08 · Perkins Field Airport

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
35
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
January 25, 2003
Seat
Right
Flight hours
1,765 total · 365 in this make and model · 1,690 as pilot in command · 18 in the last 90 days · 3 in the last 30 days
Role
Student pilot
Age
29
Injuries
None
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
26 total · 6 in this make and model · 2 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Temperature
82 °F, dew point 36 °F
Altimeter
29.79 inHg
Observed at
SGU, 48 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.