Sunday, May 05, 2019

Fuel Exhaustion: Cessna T337G Turbo Super Skymaster, N1ZR, accident occurred November 08, 2018 in Homosassa, Citrus County, Florida

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Tampa, Florida

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Pilot Tim Nubert, left, speaks with Citrus County Sheriff's Office personnel on November 8th, 2018 following his safe return from where he had to ditch his Cessna T337G Turbo Super Skymaster. He reported he ran out of fuel before putting the plane down in a swampy area off Mason Creek. 

Location: Homosassa, FL
Accident Number: GAA19CA070
Date & Time: 11/08/2018, 1000 EST
Registration: N1ZR
Aircraft: Cessna T337
Aircraft Damage: Substantial
Defining Event: Fuel exhaustion
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal 


The pilot reported that, 2 days before the accident flight, the multiengine airplane's fuel tanks were filled (150 gallons). During the taxi to the runway, the right main tire blew. During recovery, the right side of the airplane was placed on a dolly to support the gear so that the airplane could be towed. The pilot reported that, due to the airplane’s fuel system design, when one side of the airplane was raised, all the fuel could be transferred to the opposite tank, which then forced the fuel to be released out of the air vent line.

On the day of the accident, the pilot completed his preflight inspection and visually confirmed the fuel quantity by checking both fuel gauges, which were "green"; however, he did not verify the fuel onboard by checking the tanks. About 3 hours into the flight, the rear engine lost power. Before the pilot attempted to restart the rear engine and after he verified the correct engine to feather, the front engine also lost power. When the pilot realized the airplane would be unable to reach the nearest airport, he landed it in a grass marsh with the landing gear retracted. During the landing, the airplane’s wing hit grass and then veered right about 90°, which caused the left wing to dip and impact terrain.

The airplane sustained substantial damage to the left aileron and empennage.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

During his preflight inspection, the pilot should have verified the fuel quantity in the fuel tanks to ensure there was sufficient fuel onboard for the flight, and his failure to do so led to fuel exhaustion and the subsequent total loss of power in both engines. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's inadequate preflight inspection, which resulted in fuel exhaustion and the subsequent total loss of power in both engines.


Fuel - Fluid level (Cause)

Personnel issues
Fuel planning - Pilot (Cause)

Factual Information

History of Flight

Prior to flight
Aircraft servicing event

Fuel exhaustion (Defining event)
Loss of engine power (total)

Off-field or emergency landing
Landing gear not configured
Collision with terr/obj (non-CFIT)

Pilot Information

Certificate: Private
Age: 55, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 2 Without Waivers/Limitations
Last FAA Medical Exam: 05/08/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 09/11/2018
Flight Time:  (Estimated) 1293 hours (Total, all aircraft), 51 hours (Total, this make and model), 51 hours (Last 90 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Cessna
Registration: N1ZR
Model/Series: T337 G
Aircraft Category: Airplane
Year of Manufacture: 1977
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: P3370275
Landing Gear Type: Retractable - Tricycle
Date/Type of Last Inspection: 08/21/2018, 100 Hour
Certified Max Gross Wt.: 4700 lbs
Time Since Last Inspection:
Engines: 2 Reciprocating
Airframe Total Time: 1879.8 Hours as of last inspection
Engine Manufacturer: Continental
ELT: C91A installed, activated, aided in locating accident
Engine Model/Series: TSIO-520-NB16
Registered Owner: Neubert Aero Corp.
Rated Power: hp
Operator: On file
Operating Certificate(s) Held: None 

A Citrus County Sheriff's Office helicopter hovers over the site where a Cessna T337G Turbo Super Skymaster made an emergency landing on November 8th, 2018 near Mason Creek in Homosassa. The pilot was uninjured in the incident. He reported to law enforcement that he was out of fuel at the time of the hard landing.

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KCGC, 10 ft msl
Distance from Accident Site: 8 Nautical Miles
Observation Time: 1015 UTC
Direction from Accident Site: 32°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: Calm /
Turbulence Type Forecast/Actual: None / None
Wind Direction:
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.02 inches Hg
Temperature/Dew Point: 18°C / 18°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Memphis, TN (MEM)
Type of Flight Plan Filed: IFR
Destination: Brooksville, FL (BKV)
Type of Clearance: Unknown
Departure Time:  CST
Type of Airspace: Class G

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 28.753333, -82.647222 (est)


  1. Who needs a multi rating for a Skymaster? After all, it looks like a single from the front.

  2. Blame the folks with the dolly that rescued it with a flat tire on the taxi way yeah right. Good luck with insurance on the next plane.