WPR12CA375

NTSB accident investigation · Cessna 172 · Sand Point, ID · August 28, 2012

Accident · No injuriesData collectionFinal report
Date
August 27, 2012, 19:45 local (Aug 28, 2012, 02:45 UTC)
Place
Sand Point, ID
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3082ECessna 172
Defining event
Landing-flare/touchdown: Wildlife encounter (non-bird)
Weather
Visual (VMC) · Night
Status
Completed · report December 5, 2012
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
84846

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

A deer strike during the landing flare. Contributing to the accident was the airport’s lack of any deer incursion prevention measures, such as an airport perimeter fence.

Findings · 2

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.

Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Contributed to outcomeCessna 172N: 7 casesAll aircraft: 358 casesProbable cause
Airport facilities/design: securityEnvironmental issues › Operating environment · Contributed to outcomeCessna 172N: 1 caseAll aircraft: 4 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 flight instructor and the student pilot had conducted a night visual flight rules instructional flight and were returning to their home base, a nontower-controlled airport. The student pilot set the airplane up for landing, and, according to the flight instructor, they looked carefully but did not see any wildlife on or near the runway throughout the approach and flare. However, during the flare, a deer ran onto the left side of the runway and collided with the airplane’s left horizontal stabilizer. The pilots maintained control of the airplane, and the subsequent touchdown and landing roll were uneventful. The airplane’s stabilizer was substantially damaged. According to the flight instructor, this was the third deer strike at that airport in as many years. The Federal Aviation Administration (FAA) Airport/Facility Directory stated that wildlife was present on and in the vicinity of the airport, and the flight instructor reported that a similar message was normally contained in the airport's automated weather observing system radio broadcast. Postaccident discussions with the airport manager and FAA personnel revealed that deer are a known problem at the airport, and that efforts are underway to approve, fund, and install an airport perimeter fence no sooner than fall 2014. Discussions with United States Department of Agriculture Wildlife Management Division personnel revealed that the agency’s local office was willing and able to provide direct technical assistance to the airport to explore and implement deer hazard mitigation strategies in the interim.

Factual narrative

The certified flight instructor (CFI) and the student pilot had conducted a night visual flight rules instructional flight and were returning to their home, non-towered airport. The student pilot set up for landing on runway 1, and according to the CFI, they looked carefully for wildlife on and near the runway throughout the approach and flare, and did not observe any. During the flare, a deer ran onto the runway from the grass adjacent to the left runway edge, and struck or was struck by the left horizontal stabilizer. The pilots maintained control of the airplane, and the touchdown and rollout were uneventful. The stabilizer was substantially damaged, and the pilots were uninjured. According to the CFI, this was the third deer strike at that airport in as many years. The Federal Aviation Administration (FAA) Airport/Facility Directory stated that wildlife was present on and in the vicinity of the airport, and the CFI reported that a similar message was normally contained in the airport's AWOS (automated weather observing system) radio broadcast. NTSB discussions with the airport manager and personnel from the FAA revealed that deer are a known problem at the airport, and that efforts are underway to approve, fund, and install an airport perimeter fence no sooner than approximately fall 2014. Discussions with United States Department of Agriculture (USDA) Wildlife Management Division personnel revealed that the local office of the USDA was willing and able to provide direct technical assistance to the airport to explore and implement deer hazard mitigation strategies in the interim.

Aircraft

Registration
N3082E
Reported as
Cessna 172 (N)
Category
Airplane
Serial number
17271435
Airframe hours
3,880
Engine
Lycoming O-320, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Silverwing Flight Services
Registered owner
Silverwing Flight Services
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 22, 2012
Departed
SZT · Sand Point, ID
Destination
SZT · Sand Point, ID
Flight plan
Unknown
Airport
SZT · Sandpoint, runway 01, 5,500 × 75 ft, macadam

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
63
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Right
Flight hours
5,000 total · 1,000 in this make and model · 21 in the last 90 days · 15 in the last 30 days · 2 in the last 24 hours
Role
Student pilot
Age
18
Injuries
None
Certificate
Student
Medical
Class 1, With waivers/limitations
Seat
Left
Flight hours
55 total · 55 in this make and model · 25 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Night
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F
Observed at
SZT

Docket · 7

The files NTSB released with the investigation on October 12, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.1 MB in all.