DFW05CA087

NTSB accident investigation · Cessna TU206G · Lancaster, TX · March 12, 2005

Accident · No injuriesData collectionFinal report
Date
March 12, 2005, 12:30 local (18:30 UTC)
Place
Lancaster, TX
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6211ZCessna TU206G
Weather
Visual (VMC) · Day
Status
Completed · report June 8, 2005
Report
Approved by Office Director
FAA report
20050312003239A
Case key
61138

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 mismanagement of the available fuel supply, which resulted in a total loss of engine power due to fuel starvation.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of engine powerApproach
Fluid,fuel - starvation/exhaustionCause
In-flight planning/decision - improperPilot in commandCause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterEmergency landing
Terrain condition - open field

Analysis

The 24,611-hour airline transport rated pilot made a forced landing to an open field after a total loss of engine power while on a visual approach. He did not visually check the fuel tanks prior to take off and he could not recall what the fuel gauges indicated during the flight. However, he thought that both auxiliary fuel tanks were full, and both main fuel tanks were almost full. The power loss occurred when the pilot moved the fuel selector valve from the left main fuel tank to the right main fuel tank in preparation to land. The pilot attempted to re-start the engine by switching the fuel selector valve back to the left tank, but to no avail. Examination of the both wings revealed the right main and auxiliary fuel tanks were breached from impact. When the system was pressurized, fuel was noted in the auxiliary tank's fuel lines. Both of the main tank's fuel screens were absent of debris. At the time the airplane was recovered, there was no fuel in either tank. The left main and auxiliary tanks were intact, and both of the main tank's fuel screens were absent of debris. At the time the airplane was recovered, approximately nine gallons of fuel were drained from the auxiliary tank and the main tank was empty. Examination of the accident site where the airplane came to rest revealed the grass was discolored yellow below the area of the right auxiliary tank, the inboard section of the right main tank, and the left auxiliary tank. According to an FAA inspector who examined the amphibian airplane at the accident site, when he opened the left auxiliary fuel cap, fuel poured out of the tank and onto the ground. Following recovery to a secure location, the engine was test-run on the airframe, utilizing a test propeller. The engine started immediately and ran at various power settings without interruptions. No mechanical anomalies were noted.

Factual narrative

On March 12, 2005, about 1230 central standard time, a Cessna TU206G single-engine amphibian airplane , N6211Z, was substantially damaged during a forced landing following a reported loss of engine power while on a visual approch to the Lancaster Airport (LNC), near Lancaster, Texas. The airline transport rated pilot and the passenger were not injured. No flight plan was filed for the flight that originated at the Addison Airport (ADS), near Dallas, Texas, about 1200. Visual meteorological conditions prevailed for the personal flight conducted under 14 Code of Federal Regulations part 91.

In a telephone conversation, the pilot stated he did not visually check the fuel tanks prior to take off and he did not recall what the fuel gauges indicated. However, he thought both auxiliary fuel tanks were full, and each main tank was just below full. After departure, he climbed to and leveled-off at an altitude of 2,000 feet msl and flew direct to the Lancaster Airport and prepared to land on Runway 13. As he approached the runway, he began a descent and prepared the airplane for landing, and switched the fuel selector valve from the left main fuel tank to the right main fuel tank. After switching fuel tanks, the engine stopped producing power. The pilot attempted to re-start the engine by switching the fuel selector valve back to the left tank, but was unable to regain engine power. He also said that when he moved the throttle through its full range of motion, there was no response. The pilot stated that he was losing altitude and airspeed, so he made a "tremendous" left turn to a clearing and made a forced landing. The landing gear were not extended and the when the airplane contacted the ground it bounced and the floats separated. The airplane then skidded on it's belly before it came to a rest. The left wing strut collapsed and the wing tip was resting on the ground.

The airplane was equipped with an after-market fuel conversion, which included the installation of two 15-gallon tip tanks; one in each wing. He also had a front right side door installed.

The pilot stated that when the airplane came to a rest, he exited the airplane from the right front door and observed a "pencil-thin" stream of fuel running down the trailing edge of the wing near the aft doorpost.

Examination of both wings revealed the right main and auxiliary fuel tanks were breached from impact. When the system was pressurized, fuel was noted in the auxiliary tank's fuel lines. Both of the main tank's fuel screens were absent of debris. At the time the airplane was recovered, there was no fuel in either tank.

The left main and auxiliary tanks were intact, and both of the main tank's fuel screens were absent of debris. At the time the airplane was recovered, approximately nine gallons of fuel were drained from the auxiliary tank and the main tank was empty.

Examination of the accident site where the airplane came to rest revealed the grass was discolored yellow below the area of the right auxiliary tank, the inboard section of the right main tank, and the left auxiliary tank. According to an FAA inspector who examined the airplane at the site, when he opened the left auxiliary fuel cap, fuel poured out of the tank and onto the ground.

Following recovery to a secure location, the engine was test-run on the airframe, utilizing a test propeller. The engine started immediately and ran at various power settings without interruptions. No mechanical anomalies were noted.

The pilot held an airline transport pilot certificate and held numerous type ratings. He reported a total of 24,611 flight hours.

Aircraft

Registration
N6211Z
Reported as
Cessna TU206G
Category
Airplane
Serial number
U20606190
Engine
Continental TSIO-520, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Robert E. Grassle
Airworthiness certificate
Standard, Utility
Departed
ADS · Addison, TX
Destination
LNC · Lancaster, TX

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
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 1
Flight hours
24,000 total · 1,000 in this make and model

Weather

Conditions
Visual (VMC) · Day

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.