ANC21LA001

NTSB accident investigation · Douglas C54 · Yakataga, AK · October 10, 2020

Accident · No injuriesClass 4 · LimitedFinal report
Date
October 10, 2020, 15:44 local (23:44 UTC)
Place
Yakataga, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N96358Douglas C54
Defining event
Landing: Runway excursion
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Alaska Regional Office
Parties
FAA
FAA report
20201010019909A
Case key
102137

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 pilots’ decision to land on a wet, soft runway, which resulted in the loss of braking action upon landing and a subsequent runway overrun and nose landing gear collapse.

Findings · 7

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.

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 commercial pilot reported that the flight had been delayed for “nearly 2 weeks due to rain” but that the company had contacted their customer, who was a local resident of the area, and he had reported that the landing grass airstrip was “currently dry” and that he was unaware of any NOTAMs reporting that the runway was closed. The pilot reported that, while landing the airplane on the airstrip, the braking action was “zero” along the entire length of the runway. Subsequently, while about 5 knots, the airplane overran the end of the runway, and the nose landing gear collapsed. The airplane sustained substantial damage to the forward fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot reported that, during a formal flight brief from a Federal Aviation Administration (FAA) Flight Service Station (FSS), he and the copilot asked if there was “anything special going on down there” that they should be aware of” but that FSS personnel did not mention any NOTAMs stating that the runway was closed to heavy airplanes nor was it mentioned when they activated the flight plan. However, according to FAA FSS recordings, during the first conversation, the pilot did not ask for any NOTAMs for the airport. During the second conversation, the FSS asked the pilots if they needed any weather information or NOTAMs, and the pilots responded, “no,” and that they “were all good.” A NOTAM had been issued, which stated, in part, that the landing runway was closed to aircraft that weighed more than 5,000 lbs. The airport chart supplement remarks stated, in part, that “the runway was extremely soft when wet…Use of heavy aircraft over 4,000 lbs gross not recommended during fall, winter, & spring due to” soft field conditions and rutting.” The pilot reported that the airplane’s weight was about 62,568 lbs at the time of the accident.

Aircraft

Registration
N96358
Reported as
Douglas C54 (EDC)
Category
Airplane
Serial number
27284
Built
1944
Airframe hours
33,718
Engines
Pratt & Whitney R2000 7M2, 1,450 horsepower, reciprocatingPratt & Whitney R2000 7M2, 1,450 horsepower, reciprocatingPratt & Whitney R2000 7M2, 1,450 horsepower, reciprocatingPratt & Whitney R2000 7M2, 1,450 horsepower, reciprocating
Damage
Substantial damage
Flight
Other work use · Part 91
Operator
Alaska Air Fuel Inc
Registered owner
Alaska Air Fuel Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
AAIP · October 7, 2020
Departed
PAEN · Kenai, AK
Destination
Same as departure
Flight plan
VFR
Airport
0AA1 · Yakataga Airport, runway 8, 4,350 × 75 ft, grass/turf
Equipment
Stall warning system, Satellite tracking device, Electronic flight bag or handheld device, ADS-B

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
Pilot
Age
60
Injuries
None
Certificates
Commercial, Airline transport, Flight engineer
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 1, Without waivers/limitations
Last flight review
December 18, 2019
Seat
Left
Flight hours
17,925 total · 2,163 in this make and model · 13,748 as pilot in command · 207 in the last 90 days · 56 in the last 30 days · 2 in the last 24 hours
Role
Co-pilot
Age
59
Injuries
None
Certificate
Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 2, With waivers/limitations
Last flight review
December 18, 2019
Seat
Right
Flight hours
8,832 total · 1,964 in this make and model · 2,620 as pilot in command · 207 in the last 90 days · 56 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
8 statute miles
Lowest ceiling
None
Temperature
37 °F, dew point 37 °F
Altimeter
29.27 inHg
Observed at
PACY

Docket · 4

The files NTSB released with the investigation on April 19, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 15.7 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.