ANC19CA003

NTSB accident investigation · Cessna 207 · Anchorage, AK · October 11, 2018

Accident · No injuriesData collectionFinal report
Date
October 11, 2018, 12:50 local (20:50 UTC)
Place
Anchorage, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6492HCessna 207
Defining event
Approach-VFR pattern final: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report March 3, 2020
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration FSDO
FAA report
20181011019729A
Case key
98508

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 inadequate in-flight fuel management, which resulted in fuel starvation and the subsequent loss of engine power, and her subsequent failure to maintain clearance from trees during the approach to land at a nearby airstrip.

Findings · 6

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 207A: 11 casesAll aircraft: 9,295 casesProbable cause
Action: forgotten action/omissionPersonnel issues › Action/decision · PilotCessna 207A: 1 caseAll aircraft: 440 casesProbable cause
Planning/preparation: fuel planningPersonnel issues › Task performance · PilotCessna 207A: 1 caseAll aircraft: 719 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Effect on operationCessna 207A: 2 casesAll aircraft: 933 casesProbable cause
Runway/land/takeoff/taxi surface: soft surfaceEnvironmental issues › Physical environment · Contributed to outcomeCessna 207A: 2 casesAll aircraft: 264 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 on a visual approach at 700 ft, the airplane lost all engine power. The pilot immediately recognized that the selected fuel tank was empty because she had forgotten to switch fuel tanks during the flight. She attempted to restore engine power by selecting the other fuel tank, which did have fuel remaining, and activating the auxiliary fuel pump. Partial engine power was restored, and the pilot decided to land at a nearby private airstrip. During the approach, the right wing struck a tree. The pilot continued the landing, and during the landing roll, the nosewheel contacted soft gravel, and the nose landing gear collapsed. The airplane sustained substantial damage to the right wing and fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that, while on a visual approach at 700 feet, the airplane experienced a total loss of engine power. The pilot immediately recognized that the selected fuel tank was empty because she had forgotten to switch fuel tanks during the flight. She attempted to restore engine power by selecting the other fuel tank, which did have fuel remaining, and activating the auxiliary fuel pump. Partial engine power was restored, and the pilot decided to land at a nearby private airstrip. During the approach, the airplane's right wing struck a tree, resulting in substantial damage. The pilot continued the landing and during the landing roll, the nose wheel contacted soft gravel and the nose gear collapsed, resulting in impact with terrain and substantial damage to the fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N6492H
Reported as
Cessna 207 (A)
Category
Airplane
Serial number
20700544
Built
1979
Airframe hours
29,303.4
Engine
Continental IO 520 SERIES, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Positioning · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 28, 2018 · 97.3 hours before
Departed
9AK3 · Tyonek, AK
Destination
MRI · Anchorage, AK
Flight plan
Company VFR
Airport
6AK2 · Sleepers Strip, runway 06, 1,600 × 60 ft, grass/turf

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
31
Injuries
None
Certificates
Airline transport, Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
March 20, 2018
Seat
Left
Restraint
3-point
Flight hours
4,000 total · 1,500 in this make and model · 3,500 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
54 °F, dew point 36 °F
Altimeter
29.79 inHg
Observed at
PAMR, 4 nm away

Docket · 4

The files NTSB released with the investigation on October 24, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.6 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.