CHI96LA267

NTSB accident investigation · Yakovlev YAK-3UA · Fond Du Lac, WI · August 1, 1996

Accident · No injuriesLimited investigationFinal report
Date
August 1, 1996, 16:10 local (21:10 UTC)
Place
Fond Du Lac, WI
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N33UAYakovlev YAK-3UA
Weather
Visual (VMC) · Day
Status
Completed · report April 29, 1997
Report
Approved by Office Director
FAA report
19960801020529A
Case key
10335

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 pilot's inaccurate fuel consumption calculations, and his inadequate in-flight planning and decision making. The pilot's failure to declare an emergency fuel condition (inadequate communication) was a related factor.

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 power(total) - nonmechanicalApproach - vfr pattern - base leg/base to final
Fuel consumption calculations - inaccuratePilot in commandCause
In-flight planning/decision - inadequatePilot in commandCause
Communications - inadequatePilot in commandFactor
Forced landingEmergency descent/landing
On ground/water encounter with terrain/waterEmergency landing

Analysis

The pilot stated that he originally planned a direct flight at 11,500 feet, but had to descend to 1,500 feet to avoid weather for 10 to 15 minutes, then he climbed back to 11,500 feet. He said this accounted for his arrival in the vicinity of the destination airport with a low fuel level. When he contacted the control tower at the destination airport, he declared 'minimum fuel' but did not declare an emergency. There were approximately 20 other airplanes on the frequency. The pilot was cleared straight-in to the landing runway; however, the engine lost power, and the airplane was landed about three-quarters of a mile short of the intended runway. The pilot said that in order to avoid other aircraft during the approach, he slowed his airplane by lowering the flaps, which he said prevented him from reaching the runway. During a subsequent postaccident examination of the airplane, no mechanical anomaly was found.

Factual narrative

On August 1, 1996, at 1610 central daylight time, a Yak-3UA, N33UA, sustained substantial damage during a forced landing following a loss of engine power 3/4 miles south of the Fond Du Lac Airport, Fond Du Lac, Wisconsin. The pilot told responding authorities that he had run out of fuel. The pilot reported no injuries. The personal 19 CFR Part 91 flight was operating in visual meteorological conditions. No flight plan was on file. The flight departed Tulsa, Oklahoma, at 1345.

The pilot said in a written statement, that he had calculated the fuel burn based on a direct flight at 11,500 feet. He said he encountered weather en route and was forced to descend to 1,500 feet for 10 to 15 minutes and then climbed again to 11,500 feet. When he arrived in the Fond du Lac area he contacted the air traffic control tower and requested landing instructions. According to his statement he declared a fuel emergency. To this, he said he was cleared to land on runway 36; however, was asked to "deviate" to follow a Citation jet on short final. He said that he was unable to "deviate" because he had lost engine power. He said that in order to avoid the possibility of a mid-air collision he slowed his airplane by lowering the flaps which he said prevented him from reaching the end of the runway.

Both the local controller and the ground controller working in the Federal Aviation Administration, Air Traffic Control Tower, at Fond du Lac, were interviewed and they said that the airplane reported 11 miles southwest for a landing with "minimum fuel." The local controller had initially told the pilot to enter a downwind for runway 36, but having heard the fuel state, amended that to a straight in approach for runway 36 . They indicated that the airplane reported two miles west and was cleared to land although not in sight, of the local controller. When the airplane was observed it was in a descending left turn and landed short of runway 36. Neither controller heard at anytime a declaration of an emergency by the pilot. When asked about the instruction to follow the Citation, the ground controller said that the airplane was cautioned about the possibility of wake turbulence and told to follow the Citation. He said that when he saw the accident airplane that there existed a one-quarter to one-half mile separation from the jet. He said that although the accident airplane landed short of the intended runway, the Citation jet made a go-around maneuver due to its closing on a landing airplane on runway 36. He did not feel that the Citation was at anytime in conflict with the accident airplane. Both controllers said that the frequency was congested and that there were about 20 airplanes on the frequency at the time. They stated that had the pilot called and reported an emergency it is problematical whether they would have heard him or not.

The airport manager for Fond du Lac Airport was one of the first individuals to arrive at the scene of the accident. He said he asked the pilot if he was all right and then if there was any danger of a fire. The pilot responded in a way that lead this individual to believe that the airplane was out of fuel. He said that the pilot did not mention any difficulty with air traffic control or the airplane, at that time.

The first police officer to arrive at the scene made a report in which he stated that during his initial interview with the pilot, the pilot indicated that he thought during his preflight planning he would have enough fuel to reach his destination, but that he had indeed run out of gas. He did not mention to this office any mechanical difficulties with the airplane or air traffic control problems.

A subsequent examination of the airplane by Federal Aviation Administration, inspectors failed to reveal any mechanical difficulties.

Aircraft

Registration
N33UA
Reported as
Yakovlev YAK-3UA
Category
Airplane
Serial number
170-406
Engine
Allison V-1710-63, 1,325 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Thomas A. Dodson
Airworthiness certificate
Special, Experimental (Special)
Departed
RVS · Tulsa, OK
Destination
FLD

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
51
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
1,600 total · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
50° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
70 °F, dew point 59 °F
Altimeter
29.00 inHg
Observed at
FLD, 1 nm away

FAA reports on this event · 1

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