ATL91FA067

NTSB accident investigation · Piper PA-28-201T · Hamilton, NC · March 18, 1991

Accident · FatalField investigationFinal report
Date
March 18, 1991, 09:10 local (14:10 UTC)
Place
Hamilton, NC
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N2871HPiper PA-28-201T
Weather
Instrument (IMC) · Day
Status
Completed · report December 15, 1992
Report
Approved by Office Director
FAA report
19910318005709A
Case key
8315

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 improper use of equipment which affected the operation of the standby vacuum pump, the pilot's loss of aircraft control after experiencing spatial disorientation, and his exceeding the design stress limits of the aircraft. Factors related to the accident were: the mechanic's improper use of thread coating material, the pilot's operation of the aircraft with a known malfunction of the primary vacuum pump, and the adverse weather conditions.

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.

Airframe/component/system failure/malfunctionCruise - normal
Maintenance,installation - improperOther maintenance personnelFactor
Vacuum system - foreign object damageFactor
Operation with known deficiencies in equipment - continuedPilot in commandFactor
Vacuum system - failure,partial
Vacuum system - improper use ofPilot in commandCause
Weather condition - cloudsFactor
Weather condition - icing conditionsFactor
Pitot/static system - undetermined
Loss of control - in flightCruise - normal
Aircraft control - not maintainedPilot in commandCause
Spatial disorientationPilot in commandCause
Airframe/component/system failure/malfunctionDescent - uncontrolled
Design stress limits of aircraft - exceededPilot in commandCause
Flight control,stabilator - overload
Wing - overload
Flight control,rudder - overload
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The pilot reported a vacuum system failure and a pitot static system malfunction during an instrument flight under instrument weather conditions, but he elected to continue the flight. The flight track and altitude were erratic. After 28 minutes of flight, the pilot reported that he was in a dive. Subsequently, the right outboard wing panel, rudder and horizontal stabilator(s) separated in flight. Examination of the airplane revealed that the vacuum pump drive coupling sheared because of improper thread treatment (sealant tape) used during installation. The airplane was equipped with a standby vacuum system, which at higher altitudes, required that the pilot spool the system (reduce power then advance the throttle) to maintain vacuum pressure.

Aircraft

Registration
N2871H
Reported as
Piper PA-28-201T
Category
Airplane
Serial number
28-7921081
Engine
Continental TSIO-360, 200 horsepower, reciprocating
Damage
Destroyed
Flight
Business · Part 91
Operator
Sansoucie, Barry R.
Registered owner
Sansoucie, Barry R.
Departed
CRE · Myrtle Beach, SC
Destination
PAH · Newport News, VA
Flight plan
IFR

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
45
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Toxicology
Performed
Flight hours
813 total

Weather

Conditions
Instrument (IMC) · Day
Wind
300° at 10 knots
Lowest ceiling
300 ft overcast
Temperature
57 °F, dew point 57 °F
Altimeter
29.00 inHg
Observed at
RWI, 35 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.