Aircraft Accident/Incident Report

Queenstown, Maryland 20712
Tuesady, July 11, 1995 16:30 EDT

NTSB Narrative Summary Released at Completion of Accident

The pilot was conducting aerobatic maneuvers. The pilot stated, that during a maneuver, '...As I pulled out of the maneuver (a 4 to 5 G pull) I heard a very loud 'shot gun' type noise and simultaneously experienced a hard jolt and a release of pressure on the stick as the plane's nose pitched downward....The throttle lever jammed at approximately the half closed position. The plane was descending; in order to stabilize the airspeed for a forced landing, I had to hold full back stick pressure.' Examination of the aircraft revealed the upper left and right longeron tubes from the fuselage were fractured. The fracture of the longerons restricted movement of the cables for the throttle and mixture control. Metallurgical examination of the longeron fractures revealed evidence of fatigue cracking.

NTSB Probable Cause Narrative

failure of the fuselage longeron tubes due to fatigue, which resulted in partial separation (distortion) of the fuselage, partial loss of aircraft control, and a partial loss of engine power.

Event Information

Type of Event Accident
Event Date 7/11/1995
Event Day of the Week Tuesday
Time of Event 1630
Event Time Zone Eastern Daylight Time
Event City QUEENSTOWN
Event State MARYLAND
Event Country --
Zipcode of the event site 20712
Event Date Year 1995
Event Date Month 7
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude
Event Location Longitude
Event Location Airport
Event Location Nearest Airport ID
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness Not pertinent
Investigator's weather source Unknown
Time of the weather observation 0
Direction of event from weather observation facility (degrees) 0
Weather Observation Facility ID
Elevation of weather observation facility 0
Distance of event from weather observation facility (units?) 0
Time Zone of the weather observation
Lighting Conditions Day
Lowest Ceiling Height 0
Lowest Non-Ceiling Height 0
Sky/Lowest/Cloud Conditions Unknown
Sky Condition for Lowest Ceiling Unknown
Visibility Runway Visual Range (Feet) 0
Visibility Runway Visual Value (Statute Miles) 0
Visibility (Statute Miles) 0
Air Temperature at event time (in degrees celsius) --
Dew Point at event time (in degress fahrenheit) --
Wind Direction (degrees magnetic) 0
Variable Wind Indicator Unknown
Wind Speed (knots) 0
Wind Velocity Indicator Unknown
Wind Gust Indicator Unknown
Wind Gust (knots) 0
Altimeter Setting at event time (in. Hg) --
Density Altitude (feet) --
Intensity of Precipitation Unknown
METAR weather report --
Event Highest Injury None
On Ground, Fatal Injuries 0
On Ground, Minor Injuries 0
On Ground, Serious Injuries 0
Injury Total Fatal --
Injury Total Minor --
Injury Total None 1
Injury Total Serious --
Injury Total All --
Investigating Agency NTSB
NTSB Docket Number (internal use) 1547
NTSB Notification Source --
NTSB Notification Date Jul 12 1995 12:00AM
NTSB Notification Time 1600
Fiche Number and/or location -used to find docket information IMAGE
Date of most recent change to record Dec 7 2000 4:26PM
User who most recently changed record dbo
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N260BF
NTSB Number NYC95LA157
Missing Aircraft Indicator N
Federal Aviation Reg. Part Part 91: General Aviation
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name AVIAT
Aircraft Model PITTS S-2B
Aircraft Series Identifier PITTS S-2B
Aircraft Serial Number 5222
Certified Max Gross Weight 1625
Aircraft Category Airplane
Aircraft Registration Class U.S. Registered/U.S. Soil
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 2
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection Annual
Date of Last Inspection May 19 1995 12:00AM
Airframe hours since last inspection 52
Airframe Hours 830
ELT Installed Yes
ELT Activated No
ELT Aided Location of Event Site Unknown
ELT Type --
Aircraft Owner Name LYNN AVIATION INC.
Aircraft Owner Street Address 2316 BAYNARD BLVD.
Aircraft Owner City WILMINGTON
Aircraft Owner State DE
Aircraft Owner Country
Aircraft Owner Zipcode 19802
Operator is an individual? --
Operator Name
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? No
Operator Street Address 100 ASKEWTON RD.
Operator City SEVERNA PARK
Operator State MD
Operator Country
Operator Zip code 21146
Operator Code
Owner has at least one certificate None
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Unknown
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Personal
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code W29
Departure City STEVENSVILLE
Departure State MD
Departure Country
Departure Time 1605
Departure Time Zone EDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code
Destination City
Destination State
Destination Country
Specific Phase of Flight Maneuvering
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Jan 2 2001 10:34AM
User who most recently changed record dbo
Since inspection or accident --
Event Location Runway Number and Location 0
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --