ERA09CA493

NTSB accident investigation · Beech B19 · Thomasville, PA · August 30, 2009

Accident · No injuriesData collectionFinal report
Date
August 30, 2009, 16:00 local (20:00 UTC)
Place
Thomasville, PA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6982RBeech B19
Defining event
Approach-VFR pattern base: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Completed · report December 29, 2009
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20090830049119A
Case key
74630

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

A partial loss of engine power due to a partial blockage of the carburetor fuel inlet filter.

Findings · 1

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.

Fuel system: fuel filter-strainerAircraft › Aircraft systems · Capability exceededBeech B19: 1 caseAll aircraft: 52 casesProbable cause

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

According to the pilot, during the preflight inspection, he checked the full fuel tanks for water at all three access points, with none found. The engine ran smoothly during taxi, run up and takeoff, but "stumbled" upon level off. The pilot switched tanks, "checked" the carburetor heat, and found that the engine only smoothed out when he added full power. The pilot decided to return to the airport, and during the base leg, the engine lost all power, resulting in a forced landing in a cornfield. A postflight examination of the airplane by a Federal Aviation Administration inspector revealed no obvious mechanical anomalies with the physical components of the engine. However, when he examined the carburetor fuel inlet filter, the inspector found it about 75 percent blocked with particulate matter consisting of large quantities of rust, insect remains, and sand. A restriction of this amount would significantly effect the engine's ability to operate at lower power settings and could result in a total loss of engine power.

Factual narrative

According to the pilot, during the preflight inspection, he checked the full fuel tanks for water at all three access points, with none found. The engine ran smoothly during taxi, run up and takeoff, but "stumbled" upon level off. The pilot switched tanks, "checked" the carburetor heat, and found that the engine only smoothed out when he added full power. The pilot decided to return to the airport, and during the base leg, the engine lost all power, resulting in a forced landing in a cornfield. A postflight examination of the airplane by a Federal Aviation Administration inspector revealed no obvious mechanical anomalies with the physical components of the engine. However, when he examined the carburetor fuel inlet filter, the inspector found it about 75 percent blocked with particulate matter consisting of large quantities of rust, insect remains, and sand. A restriction of this amount would significantly effect the engines ability to operate at lower power settings and could result in a total loss of engine power.

Aircraft

Registration
N6982R
Reported as
Beech B19
Category
Airplane
Serial number
MB-752
Airframe hours
4,597
Engine
Lycoming O-320 SERIES, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · May 28, 2009 · 14 hours before
Departed
THV · York, PA
Destination
THV · York, PA

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
58
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Flight hours
293 total · 147 in this make and model

Weather

Conditions
Visual (VMC) · Day

Docket · 2

The files NTSB released with the investigation on October 26, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 392 KB 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.