ANC95LA042

NTSB accident investigation · Cessna 172N · Anchorage, AK · March 20, 1995

Accident · No injuriesLimited investigationFinal report
Date
March 20, 1995, 13:36 local (17:36 UTC)
Place
Anchorage, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N733RWCessna 172N
Weather
Visual (VMC) · Day
Status
Completed · report September 24, 1995
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19950320008169A
Case key
2639

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to correct for torque/p factor. The presence of snowberms that narrowed the width of the runway and the pilot's lack of total experience were factors in the accident.

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/waterTakeoff - roll/run
Torque/p-factor - not correctedPilot in commandCause
Lack of total experiencePilot in commandFactor
On ground/water encounter with terrain/waterTakeoff - aborted
Terrain condition - snowbankFactor
Airport facilities,runway/landing area condition - narrowFactor

Analysis

The student pilot was conducting touch and go landings to a runway that had recently been cleared of snow. The snow removal operations created 3 to 4 foot high snowberms along the runway edges that reduced the runway width about 25 percent. Following a landing, the pilot added power to takeoff and the airplane began to drift to the left. The pilot added right rudder input; however, the airplane continued to drift to the left. The left main gear began contacting the snowberm along the left edge of the runway and the pilot decided to abort the takeoff. The airplane pivoted to the left into the snowberm and nosed down. The pilot had accrued 51 hours of total time with 15 hours in the accident aircraft make and model.

Factual narrative

On March 20, 1995, at 1336 Alaska standard time, a wheel equipped Cessna 172N, N733RW, collided with terrain at Merrill Field, Anchorage, Alaska. The airplane was being operated as a visual flight rules (VFR) local area instructional flight when the accident occurred. The airplane, operated by Far North Aviation, Anchorage, received substantial damage. The pilot, holder of a student pilot certificate and the sole occupant, was not injured. Visual meteorological conditions prevailed. The flight originated at Merrill Field about 1200.

The pilot reported that he was landing on runway 33 and was planning to perform touch and go landings. After touchdown, the pilot added engine power and the airplane began to drift to the left. He added right rudder input; however, the airplane continued to drift to the left. The airplane's left main landing gear contacted a 3 to 4 foot high snow berm located along the left edge of the runway, about 10 feet inside the runway lights. The pilot decided to abort the takeoff and cut the engine power and attempted to stop. The airplane pivoted to the left into the snowberm and nosed down.

The pilot reported that his total aeronautical experience consisted of 51.5 hours of flight time. He had accrued 14.6 hours in the accident aircraft make and model.

A Federal Aviation Administration (FAA) airworthiness inspector of the Anchorage Flight Standards District Office (FSDO), inspected the airplane on March 30, 1995. He reported that wing repairs included replacement of wing ribs and splicing of the wing spar.

The FAA reported that the runway had patchy areas of snow and ice with several bare spots. Recent snow removal operations had created the snowberms, reducing the runway width about 25 percent.

Aircraft

Registration
N733RW
Reported as
Cessna 172N
Category
Airplane
Serial number
17268499
Airframe hours
6,122
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Teddy B. Jensen, doing business as Far North Aviation
Registered owner
Jane Meda Osborne
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 6, 1995 · 51 hours before
Departed
MRI
Airport
MRI · Merrill Field, runway 33, 2,640 × 75 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
35
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
52 total · 15 in this make and model · 9 in the last 90 days · 7 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 8 knots
Visibility
80 statute miles
Lowest ceiling
None
Temperature
25 °F
Altimeter
29.00 inHg
Observed at
MRI

FAA reports on this event · 1

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

Other investigations on N733RW · 1

Matched to the same aircraft by N-number and date.