ANC16LA011

NTSB accident investigation · Cessna 172 · Anchorage, AK · December 29, 2015

Accident · FatalLimited investigationFinal report
Date
December 29, 2015, 06:18 local (15:18 UTC)
Place
Anchorage, AK
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N914CPCessna 172
Defining event
Maneuvering: Security/criminal event
Weather
Visual (VMC) · Night
Status
Completed · report June 29, 2016
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA
FAA report
20151229020369A
Case key
92513

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 intentional flight into a building.

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.

Intentional act: suicidePersonnel issues › Miscellaneous · PilotCessna 172S: 1 caseAll aircraft: 23 casesProbable cause
Not determinedNot determined › Not determined · Other authority investigatedCessna 172S: 25 casesAll aircraft: 2,247 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

Witnesses reported seeing the airplane flying in an easterly direction at a very low altitude before striking the northwest corner of an office building. The airplane's wreckage continued traveling east while descending into an adjacent office building and subsequently struck an electrical transformer. A postcrash fire consumed the airplane wreckage. The private pilot intentionally flew the airplane into the side of the building, and he was killed. The flight was not authorized and the event was an intentional act, so the Federal Bureau of Investigation assumed jurisdiction and control of the investigation.

Factual narrative

On December 29, 2015, about 0618 Alaska standard time, a Cessna 172 airplane, N914CP, was destroyed after impacting the side of an office building in Anchorage, Alaska. The private pilot sustained fatal injuries. The airplane was registered to the Civil Air Patrol (CAP), Maxwell Air Force Base, Montgomery, Alabama, and operated by the pilot under the provisions of Title 14 Code of Federal Regulations (CFR) Part 91. Dark night, visual meteorological conditions prevailed at the time of the accident, and no flight plan had been filed. The flight originated from Merrill Field, Anchorage, about 0600. Witnesses reported seeing the airplane flying in an easterly direction and very low over the city of Anchorage, just before striking the northwest corner of the office building. The airplane's right wing struck the building between the fourth and fifth floors, which severed the entire wing at the fuselage attachment points. The airplane's wreckage continued traveling east while descending into an adjacent office building. It subsequently struck an electrical transformer, and a postcrash fire incinerated the airplane wreckage. The FAA Civil Aeromedical Institute performed toxicology examinations for the pilot on February 9, 2016, which detected the presence of the drug Zolpidem in the liver and kidney. According to the US National Library of Medicine, Zolpidem is a prescription medication used to treat insomnia and belongs to a class of medications called sedative-hypnotics that work by slowing activity in the brain to allow sleep. A postmortem examination conducted by the Alaska State Medical Examiner's Office on December 30, 2015, determined the cause of death to multiple blunt force injuries. The closest weather reporting facility is Merrill Field Airport, Anchorage, about 2 miles east of the accident site. At 0553, an aviation routine weather report (METAR) from the Merrill Field Airport was reporting in part: Wind from 170 degrees at 8 knots, gusting to 18 knots; sky condition few clouds at 7,000 feet; visibility 10 statute miles; temperature 48 degrees F, dew point 26 degrees F; altimeter 29.57 inHg. According to CAP management personnel the flight had not been authorized. The Anchorage office of the Federal Bureau of Investigation (FBI) has assumed jurisdiction and control of the investigation.

Aircraft

Registration
N914CP
Reported as
Cessna 172
Category
Airplane
Serial number
172S8334
Built
1999
Airframe hours
2,074.2
Engine
Lycoming IO360 SER A&C, 180 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 12, 2015 · 75 hours before
Departed
MRI · Anchorage, AK
Destination
MRI · Anchorage, AK
Airport
MRI · Merrill Field
Equipment
Stall warning system

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
42
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Left
Flight hours
140 total

Weather

Conditions
Visual (VMC) · Night
Wind
170° at 8 knots, gusting 18
Visibility
10 statute miles
Lowest ceiling
20,000 ft overcast
Temperature
48 °F, dew point 27 °F
Altimeter
29.56 inHg
Turbulence
Unknown
Observed at
PAMR, 1 nm away

Docket · 2

The files NTSB released with the investigation on May 5, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.1 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.