ANC15LA069

NTSB accident investigation · Piper PA 28-140 · North Pole, AK · September 2, 2015

Accident · Minor injuriesLimited investigationFinal report
Date
September 2, 2015, 15:00 local (23:00 UTC)
Place
North Pole, AK
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N7494RPiper PA 28-140
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report May 16, 2016
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20150902016419A
Case key
91925

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 loss of directional control during landing with a tailwind, which resulted in a runway excursion and collision with trees.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-28-140: 40 casesAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · Student/instructed pilotPiper PA-28-140: 103 casesAll aircraft: 9,295 casesProbable cause
Wind: tailwindEnvironmental issues › Conditions/weather/phenomena · Effect on operationPiper PA-28-140: 7 casesAll aircraft: 594 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The student pilot was conducting a local flight with a passenger on board. The passenger stated that they had overflown a moose hunting area and were returning to the departure airport for landing. After touchdown and during the landing roll, the airplane veered left, then right, then left again before departing the runway and impacting a stand of birch trees. He stated that the airplane seemed to fly great and that he was not aware of, nor did the pilot discuss, any mechanical anomalies or malfunctions during the flight. Due to injuries sustained in the accident, the student pilot was unable to remember the accident sequence. A pilot-rated witness reported that he observed the airplane on final approach with about an 8- to 10-knot tailwind and noted that the airplane appeared to be a "little fast." He stated that, after touchdown, the airplane veered left, then right, then sharply left again before exiting the runway, corroborating the passenger's statement. The examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.

Factual narrative

On September 2, 2015, about 1500 Alaska daylight time, a Piper PA-28 airplane, N7494R, sustained substantial damage following a loss of control while landing at Lakloey Air Park, North Pole, Alaska. The airplane was being operated by the student pilot as a visual flight rules (VFR) flight under the provisions of Title 14, Code of Federal Regulations (CFR) Part 91, when the accident occurred. The student pilot sustained minor injuries and the sole passenger was not injured. Visual meteorological conditions prevailed and no flight plan had been filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on September 2, the passenger stated that they had overflown a moose hunting area and were returning for landing. After touchdown, during the landing roll, the airplane veered to the left, then to the right, then back to the left before departing the runway and impacting a stand of birch trees. He stated that the airplane seemed to fly great, and he was not aware of, nor did the pilot discuss, any mechanical anomalies or malfunctions during the course of the flight. During an interview with the NTSB, IIC on September 3 the pilot stated that the only thing he remembered from the accident flight was being on short final for runway 24 at Lakloey Air Park. At the time of the accident, a pilot rated witness on the northeast corner of Lakloey Air Park reported light wind conditions out of the east at 8 to 10 knots. He observed the accident airplane on final approach for runway 24; a downwind landing. He noted that the airplane appeared to be a "little fast", and estimated the groundspeed to be about 60 miles per hour. He said that after touchdown, the airplane veered to the left, then to the right, then back sharply to the left before exiting the runway. The NTSB IIC reached the accident site on the morning of September 3. The airplane came to rest upright in a densely populated stand of birch trees about midfield and adjacent to runway 24, on a heading of about 250 degrees. All the primary flight controls were identified at the accident site. Stabilator control continuity was established from the control column to the stabilator balance arm. Rudder control continuity was established from the rudder torque tube to the rudder horn. Aileron control continuity was established in the direct cables, from the control column to the point where the right cable fractured with features consistent with tension overload, to the left and right aileron bellcranks, and in the balance cable to the point where the cable fractured with features consistent with tension overload, to the left and right aileron bellcranks. The airplane sustained substantial damage to the wings and fuselage. The examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. The closest weather reporting facility is Ladd Army Airfield, Fort Wainwright, AKapproximately 3 miles west of the accident site. At 1458, an aviation routine weather report (METAR) at Fort Wainwright, Alaska, reported in part: wind 090 degrees at 7 knots, visibility, 10 statute miles, clear skies; 67 degrees F; dew point 37 degrees F; altimeter, 29.87 inHG. Title 14, Code of Federal Regulation (CFR) Part 61 prescribes in part: The requirements for issuing pilot certificates and ratings, and the privileges and limitations of these certificates and ratings. The student pilot was subject to the part's applicable rules. Section 61.89, states, in part: A student pilot may not act as pilot in command of an aircraft: That is carrying a passenger.

Aircraft

Registration
N7494R
Reported as
Piper PA 28-140
Category
Airplane
Serial number
28-22048
Built
1966
Airframe hours
3,405
Engine
Lycoming O-320 SERIES, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Luis M. Jara
Registered owner
Luis M. Jara
Airworthiness certificate
Standard, Normal
Last inspection
Annual · May 5, 2015
Departed
AK22 · North Pole, AK
Destination
AK22 · North Pole, AK
Airport
AK22 · Lakleoy Air Park, runway 24, 4,000 × 50 ft, grass/turf
Equipment
Satellite tracking device, Electronic flight bag or handheld device, Electronic multifunction display, Handheld GPS

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
30
Injuries
Minor
Certificate
Student
Medical
Class 3, Without waivers/limitations
Seat
Left
Restraint
Lap only
Flight hours
66 total · 60 in this make and model · 25 as pilot in command · 20 in the last 90 days · 12 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
57 °F, dew point 34 °F
Altimeter
30.04 inHg
Observed at
PAFB, 3 nm away

Docket · 3

The files NTSB released with the investigation on March 7, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 6.4 MB in all.

FAA reports on this event · 1

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