ANC14CA014

NTSB accident investigation · Cessna 170 - B · Nome, AK · January 4, 2014

Accident · Minor injuriesData collectionFinal report
Date
January 4, 2014, 14:45 local (18:45 UTC)
Place
Nome, AK
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N8177ACessna 170 - B
Defining event
Enroute: Fuel contamination
Weather
Visual (VMC) · Day
Status
Completed · report April 1, 2014
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20140104000539A
Case key
88642

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 pilot's failure to adequately remove water-contaminated fuel during the preflight inspection, which resulted in a total loss of engine power.

Findings · 4

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.

Inspection: preflight inspectionPersonnel issues › Task performance · PilotCessna 170B: 1 caseAll aircraft: 551 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Inadequate inspectionCessna 170B: 5 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid conditionCessna 170B: 5 casesAll aircraft: 1,695 casesProbable cause
Terrain: snowy/icy terrainEnvironmental issues › Physical environment · Contributed to outcomeCessna 170B: 4 casesAll aircraft: 77 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

According to the pilot, the airplane was pulled out of the hangar and preflighted for a maintenance test flight, following an extensive annual inspection. Approximately 10 minutes after departure the airplane lost all engine power, and made an emergency landing on the sea ice. During the emergency landing the airplane sustained substantial damage to the fuselage. While inspecting the airplane after the accident, the pilot said he found water in the airplane's gascolator. A postaccident examination of the airplane by a Federal Aviation Administration aviation safety inspector revealed water in the fuel system, including the carburetor bowl. The pilot indicated that other than the water in the fuel, there were no preaccident mechanical malfunctions or anomalies that would have precluded normal operation. In the pilot's written statement to the National Transportation Safety Board he noted that the accident might have been avoided if the airplane had been placed on level ground after it was pulled from the hangar, thereby allowing the water to be drained from the fuel system.

Factual narrative

According to the pilot, the airplane was pulled out of the hangar and preflighted for a maintenance test flight, following an extensive annual inspection. Approximately 10 minutes after departure the airplane lost all engine power, and made an emergency landing on the sea ice. During the emergency landing the airplane sustained substantial damage to the fuselage. While inspecting the airplane after the accident, the pilot said he found water in the airplane's gascolator. A postaccident examination of the airplane by a Federal Aviation Administration aviation safety inspector revealed water in the fuel system, including the carburetor bowl. The pilot indicated that other than the water in the fuel, there were no preaccident mechanical malfunctions or anomalies that would have precluded normal operation. In the pilot's written statement to the National Transportation Safety Board he noted that the accident might have been avoided if the airplane had been placed on level ground after it was pulled from the hangar, thereby allowing the water to be drained from the fuel system.

Aircraft

Registration
N8177A
Reported as
Cessna 170 - B (B)
Category
Airplane
Serial number
25029
Built
1952
Airframe hours
5,172
Engine
Continental C-145, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Flight test · Part 91
Operator
James West
Registered owner
James West
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 4, 2014
Departed
Nome, AK
Destination
Nome, AK

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
74
Injuries
Minor
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
April 1, 2013
Seat
Right
Restraint
Lap only
Flight hours
30,000 total · 120 in this make and model · 30,000 as pilot in command · 3 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
27 °F, dew point 21 °F
Altimeter
29.97 inHg
Observed at
PAOM, 9 nm away

Docket · 1

The files NTSB released with the investigation on March 14, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 215 KB 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 N8177A · 1

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