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NTSB Report
October 1, 1989 · Beech C90 · N43GT
Chamblee, GA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
October 1, 1989
Injury Outcomes
2 injuries (2 fatalities)
Location
Chamblee, GA
Aircraft
Beech C90
Tail Number
N43GT
Operator
Roy Beatty
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
ATL90FA001
AFTER TAKING OFF, THE PLT ESTABLISHED RADIO CONTACT WITH DEP CTL & RPRTD A DIRECTIONAL GYRO PROBLEM. SECONDS LATER, HE RPRTD THAT HE WAS LOSING ALL INSTRUMENTS. DEP CTL ATTEMPTED TO PROVIDE NO-GYRO VECTORS. THE PLT WAS INSTRUCTED TO MAKE A FREQ CHANGE. SOON THEREAFTER, RADIO & RADAR CONTACT WERE LOST & THE ACFT CRASHED. BEFORE CRASHING THE ACFT WAS OBSERVED IN A ROLLING ATTITUDE. WRECKAGE WAS FOUND SCATTERED OVER A 600' BY 150' AREA. AN EXAM REVEALED THE RIGHT WING HAD SEPD IN FLT. THERE WAS EVIDENCE THAT THE RIGHT WING HAD FAILED IN AN UPWARD (POSITIVE) DRCTN. THE PLT'S ATTITUDE GYRO WAS DAMAGED DURING IMPACT, BUT NO ROTATIONAL DAMAGE WAS NOTED. THE PLT'S ATTITUDE INDCR & COPLT'S TURN INDCR WERE AIR DRIVEN, THE PLT'S TURN INDCR WAS DC POWERED & THE COPLT'S ATTITUDE INDCR WAS AC POWERED. THE MAINTENANCE LOG DID NOT HAVE A CURRENT STATIC/ALTIMETER & TRANSPONDER CHECK.
NTSB Probable Cause
MALFUNCTION OF ONE OR MORE FLIGHT INSTRUMENTS FOR AN UNDETERMINED REASON, FAILUE OF THE PILOT TO MAINTAIN CONTROL OF THE AIRCRAFT WITH PARTIAL PANEL INSTRUMENTS AFTER BECOMING SPATIALLY DISORIENTED, AND HIS EXCEEDING THE DESIGN STRESS LIMITS OF THE AIRCRAFT. THE WEATHER (LOW CEILING) AND MALFUNCTIONING DIRECTIONAL GYRO WERE RELATED FACTORS.
Full Narrative
AFTER TAKING OFF, THE PLT ESTABLISHED RADIO CONTACT WITH DEP CTL & RPRTD A DIRECTIONAL GYRO PROBLEM. SECONDS LATER, HE RPRTD THAT HE WAS LOSING ALL INSTRUMENTS. DEP CTL ATTEMPTED TO PROVIDE NO-GYRO VECTORS. THE PLT WAS INSTRUCTED TO MAKE A FREQ CHANGE. SOON THEREAFTER, RADIO & RADAR CONTACT WERE LOST & THE ACFT CRASHED. BEFORE CRASHING THE ACFT WAS OBSERVED IN A ROLLING ATTITUDE. WRECKAGE WAS FOUND SCATTERED OVER A 600' BY 150' AREA. AN EXAM REVEALED THE RIGHT WING HAD SEPD IN FLT. THERE WAS EVIDENCE THAT THE RIGHT WING HAD FAILED IN AN UPWARD (POSITIVE) DRCTN. THE PLT'S ATTITUDE GYRO WAS DAMAGED DURING IMPACT, BUT NO ROTATIONAL DAMAGE WAS NOTED. THE PLT'S ATTITUDE INDCR & COPLT'S TURN INDCR WERE AIR DRIVEN, THE PLT'S TURN INDCR WAS DC POWERED & THE COPLT'S ATTITUDE INDCR WAS AC POWERED. THE MAINTENANCE LOG DID NOT HAVE A CURRENT STATIC/ALTIMETER & TRANSPONDER CHECK.
Flight
Event TypeAccident
Event Time16:42 EDT
Nearest AirportDekalb Peachtree (0nm N)
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech C90
Tail NumberN43GT
Aircraft CategoryAir
DamageDestroyed
OperatorRoy Beatty
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PT6A-20 · Turboprop · 579
Seats8
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 48 · First Class
Conditions
ConditionsIMC
LightDaylight
Wind110° @ 7 kt
Visibility2 sm
CeilingBroken clouds 700 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time18:55
Weather SourceWFAC