GAA19CA401

NTSB accident investigation · Cessna 172 · Vineyard Haven, MA · July 11, 2019

Accident · No injuriesData collectionFinal report
Date
July 10, 2019, 21:54 local (Jul 11, 2019, 01:54 UTC)
Place
Vineyard Haven, MA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N677DMCessna 172
Defining event
Approach: Course deviation
Weather
Instrument (IMC) · Night
Status
Completed · report December 2, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20190710009739A
Case key
99817

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 maintain lateral position in relation to the instrument approach course at night in instrument meteorological conditions, which resulted in collision with a tree.

Findings · 5

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: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 172S: 18 casesAll aircraft: 809 casesProbable cause
Use of equip/info: use of equip/systemPersonnel issues › Task performance · PilotCessna 172S: 14 casesAll aircraft: 1,391 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Effect on operationCessna 172S: 11 casesAll aircraft: 933 cases
Ceiling/visibility/precip: low visibilityEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 172S: 1 caseAll aircraft: 175 cases
Light condition: darkEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 172S: 19 casesAll aircraft: 448 cases

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 pilot reported that, while conducting an instrument landing system (ILS) approach at night in instrument meteorological conditions and while correcting course on the ILS, she saw full right deflection, corrected to the left, and then observed full left deflection on the course direction indicator about the decision altitude. She added that she then heard and felt a loud "bang." The airplane turned left, she aborted the approach, executed a missed approach, and declared an emergency. She was then vectored to a nearby airport where she landed the airplane without further incident. The airplane sustained substantial damage to the left wing. An examination by the Federal Aviation Administration inspector revealed pine needles in the damaged section of the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The airport's automated weather observation station reported that, about the time of the accident, the wind was from 220° at 5 knots, visibility 1/4 statute mile, runway visual range 1,800 ft, variable 2,200 ft, cloud condition fog, vertical visibility 200 ft, temperature 21°C (70°F), dew point 21°C (70°F), and altimeter setting 30.01 inches of mercury. The pilot was landing the airplane on runway 24.

Factual narrative

The pilot reported that, while conducting the instrument landing system (ILS) 24 approach at night in instrument meteorological conditions, while correcting course on the ILS, she saw full right deflection, corrected to the left, and then observed full left deflection on the course direction indicator (CDI) at about the decision altitude. She then heard and felt a loud "bang." The airplane turned left, she aborted the approach, executed the missed approach, and declared an emergency. She was then vectored to a nearby airport where she landed without further incident. An examination by the Federal Aviation Administration inspector revealed pine needles in the damaged section of the airplane's left wing. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The airport's automated weather observation station reported that, about the time of the accident, the wind was from 220° at 5 knots, visibility one-quarter statute miles, runway visual range 1,800 ft variable 2,200 ft, cloud condition fog, vertical visibility 200 ft, temperature 21°C (70°F), dew point 21°C (70°F), altimeter setting 30.01" Hg. The airplane was landing runway 24.

Aircraft

Registration
N677DM
Reported as
Cessna 172 (SP)
Category
Airplane
Serial number
172S9661
Built
2004
Airframe hours
8,060.1
Engine
Lycoming IO-360-L2A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Air Fleet Training Systems
Registered owner
Aa-Aero Inc
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · July 3, 2019
Departed
GON · Groton (New London), CT
Destination
MVY · Vineyard Haven, MA
Flight plan
IFR
Airport
MVY · Martha's Vineyard, runway 24, 5,504 × 100 ft, asphalt
Equipment
Auto-pilot, ADS-B, 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
25
Injuries
None
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
March 26, 2019
Seat
Right
Restraint
3-point
Flight hours
600 total · 550 in this make and model · 540 as pilot in command · 133.3 in the last 90 days · 54.7 in the last 30 days · 1.5 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night
Wind
220° at 5 knots
Lowest ceiling
200 ft overcast
Temperature
70 °F, dew point 70 °F
Altimeter
30.01 inHg
Observed at
KMVY

Docket · 3

The files NTSB released with the investigation on September 6, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.5 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.

Other investigations on N677DM · 1

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