ANC10LA024

NTSB accident investigation · Cessna A185E · Ophir, AK · March 10, 2010

Accident · No injuriesLimited investigationFinal report
Date
March 10, 2010, 15:00 local (19:00 UTC)
Place
Ophir, AK
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N70039Cessna A185E
Defining event
Enroute-cruise: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report April 28, 2011
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA/FSDO
FAA report
20100310029659A
Case key
75498

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 NTSB’s determination of the probable cause, and any contributing factors.

The total loss of engine power for an undetermined reason.

Findings · 2

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings.

Analysis

The pilot reported that during cruise flight, with the airplane about 600 feet above the ground, the engine lost all power. He was unable to restore power, and during the ensuing off-airport forced landing, the left wing struck a tree, resulting in substantial damage. A postaccident examination disclosed ample fuel and no evidence of any preimpact mechanical problems with the engine. No reason for the loss of engine power could be determined.

Factual narrative

The factual narrative542 words

On March 10, 2010, about 1500 Alaska standard time, a ski/wheel equipped Cessna A185E, N70039, registered to and operated by a private individual, landed hard during a forced landing near Ophir, Alaska. Visual meteorological conditions prevailed, and no flight plan was filed for the 14 Code of Federal Regulations (CFR) Part 91 personal flight from Takotna, Alaska, to McGrath Airport, McGrath, Alaska. The airplane sustained substantial damage. The commercial certificated pilot and two passengers were not injured. The flight originated from Takotna about 1415. The pilot stated that the purpose of the flight was to see the Iditarod sled race. The pilot departed Anchorage the day before with full fuel tanks, and flew to Nikolai, Alaska, landing uneventfully; the flight duration was approximately 1 hour 30 minutes. The airplane remained on the ground overnight, and on the accident date was flown from Nikolai to Takotna, remaining on the ground approximately 3 hours. He departed Takotna with approximately 35 gallons of fuel as indicated by the fuel quantity gauges, and flew towards Cripple. About ½ way towards Cripple, he elected to fly to McGrath. The airplane at that time was about 5 miles east of Ophir. The pilot said that while flying between 500 and 600 feet, the engine suddenly quit. He turned the boost pump to high, moved the fuel selector from the “both” position, and moved the magneto switch in efforts to restore engine power. He was unable to restore power and maneuvered the airplane for a forced landing in a clearing. During a controlled descent, the left wing collided with a tree, causing the airplane to decelerate. The airplane then impacted the ground hard, coming to rest upright in a left wing low attitude. The occupants evacuated the airplane and the pilot radioed on 121.5 MHz announcing that he had performed a forced landing giving his coordinates. The flightcrew of a Chinese airline heard the radio call and relayed that information to air traffic control. The flightcrew of an airplane associated with the Iditarod sled race flew to the accident site area and advised the pilot of the direction of the sled race trail. Prior to leaving the area the pilot noticed fuel leaking from the left wing fuel vent line, which he attempted to stop by turning the firewall fuel shutoff valve to the off position. He and the passengers walked towards the trail and were taken by snowmobile to Ophir. Because of the remote location of the accident site, an inspection of the airplane by personnel from the Federal Aviation Administration (FAA) was not possible before recovery. The individual who recovered the airplane reported approximately 20 gallons of fuel were drained from the airplane’s fuel tanks. The airplane was later removed from the site and transported to Anchorage, Alaska, for further examination. Examination of the airplane and engine following recovery by a FAA airworthiness inspector revealed all three propeller blades were bent aft with someleading edge damage. All engine controls and external fluid hoses were secure and properly attached. The engine rotated freely and all accessories exhibited normal motion. The airplane’s fuel system and fuel strainers were examined with no discrepancies noted. No determination could be made as to the reason for the reported loss of engine power.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident.

Aircraft

Registration
N70039
Reported as
Cessna A185E
Category
Airplane
Serial number
18501910
Airframe hours
4,409
Engine
Cont Motor IO-520D, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Wight John I
Registered owner
Wight John I
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 26, 2010
Departed
Takotna, AK
Destination
PAMC · McGrath, 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
65
Injuries
None
Certificates
Airline transport, Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
November 6, 2009
Seat
Left
Flight hours
27,000 total · 1,500 in this make and model · 23,000 as pilot in command · 15 in the last 90 days · 4 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
-0 °F, dew point -13 °F
Altimeter
29.40 inHg
Observed at
PAMC

Docket · 4

The files NTSB released with the investigation on January 26, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.6 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.

Other investigations on N70039 · 3

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