ANC03LA087

NTSB accident investigation · Cessna 170 · Anchorage, AK · August 1, 2003

Accident · No injuriesLimited investigationFinal report
Date
August 1, 2003, 12:05 local (20:05 UTC)
Place
Anchorage, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3418CCessna 170
Weather
Visual (VMC) · Day
Status
Completed · report March 2, 2004
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
FAA report
20030801037189A
Case key
57634

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 pilot's inadequate compensation for a crosswind condition and his failure to maintain directional control of the airplane that resulted in the left wing contacting the runway surface during the landing roll. Factors contributing to the accident were the presence of the crosswind, and the pilot's lack of experience in tailwheel airplanes.

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 - on ground/waterLanding - roll
Lack of total experience in kind of aircraftPilot in commandFactor
Weather condition - crosswindFactor
Compensation for wind conditions - inadequatePilot in commandCause
Directional control - not maintainedPilot in commandCause
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - runway

Analysis

The private certificated pilot had recently received a tailwheel endorsement, and was practicing landings in the tailwheel-equipped airplane at various airports. During the accident landing, the pilot reported that a right crosswind was blowing between 10 to 12 knots. He said the airplane bounced on touchdown, and the right wing was lifted by the wind. He corrected the bounce by application of rudder, but the left wing contacted the runway surface and the airplane ground looped. The pilot said a mechanic examined the airplane and advised him that two outboard wing ribs of the left wing and the left aileron required replacement.

Factual narrative

On August 1, 2003, about 1205 Alaska daylight time, a tailwheel-equipped Cessna 170 airplane, N3418C, sustained substantial damage when the left wing contacted the runway following a loss of control during the landing roll at Merrill Field, Anchorage, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight under Title 14, CFR Part 91, when the accident occurred. The airplane was operated by the pilot. The private certificated pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. The flight originated at Merrill Field about 0900. No flight plan was filed, nor was one required.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on August 5, the pilot reported that he recently received a tailwheel endorsement. He said he was practicing landings at various airports and then landed on runway 24 at Merrill Field. During the landing, the pilot reported that a right crosswind was blowing between 10 to 12 knots. He said the airplane bounced on touchdown, and the right wing was lifted by the wind. He corrected the bounce by application of rudder, but the left wing contacted the runway surface and the airplane ground looped. The pilot said a mechanic examined the airplane and advised him that two outboard wing ribs of the left wing and the left aileron required replacement.

At 1153, an Aviation Routine Weather Report (METAR) at Merrill Field was reporting in part: Wind, 330 degrees (true) at 7 knots; visibility, 10 statute miles; clouds and sky condition, few at 6,000 feet, 12,000 feet scattered; temperature, 64 degrees F; dew point, 35 degrees F; altimeter, 30.03 inHg.

Aircraft

Registration
N3418C
Reported as
Cessna 170
Category
Airplane
Serial number
64621
Airframe hours
4,623
Engine
Continental C-145, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Gary R. Ritchey
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 12, 2003 · 30 hours before
Departed
PAMR · Anchorage, AK
Airport
PAMR · Merrill Field, runway 24, 4,000 × 100 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
54
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
July 29, 2003
Seat
Left
Flight hours
106 total · 33 in this make and model · 26 in the last 90 days · 26 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
305° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 36 °F
Altimeter
30.03 inHg
Observed at
PAMR

FAA reports on this event · 1

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