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NTSB Report
May 24, 1986 · Cessna 210M · N750RS
Calumet, OK
Overview
Report Status
Preliminary report
Event Type
Accident
Date
May 24, 1986
Injury Outcomes
2 injuries (2 fatalities)
Location
Calumet, OK
Aircraft
Cessna 210M
Tail Number
N750RS
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
FTW86FA092
ACFT ON A NIGHT XC FLT IN MARGINAL VFR TO IMC CONDITIONS IMPACTED IN AN 80 DEG NOSE DOWN ATTITUDE IN A LEFT SPIRAL. IMMEDIATELY PRIOR TO THE ACCIDENT THE NON-INSTRUMENT RATED PVT PLT HAD INDICATED THAT HE WAS IMC AND WAS GOING TO ATTEMPT TO CLIMB OUT OF IT. RADAR DATA INDICATED THAT THE ACFT STARTED A CLIMBING LEFT TURN AND THEN ENTERED A LEFT SPIRALING DESCENT. INVESTIGATION REVEALED THAT THE ATTITUDE INDICATOR GYRO HAD FAILED AND WAS NOT ROTATING AT OPERATIONAL RPM AT THE TIME OF IMPACT. EXAMINATION OF THE VACUUM PUMP AND THE HSI GYRO INDICATED THAT THEY WERE OPERATING NORMALLY. THERE WAS NO INTERNAL FAILURE IN THE ATTITUDE INDICATOR AND THE REASON FOR THE FAILURE WAS NOT DETERMINED DUE TO THE LEVEL OF DAMAGE SUSTAINED IN THE FIRE WALL AND INSTRUMENT PANEL AREAS. THE PVT PLT HAD LAST PRACTICED INSTRUMENT FLT 3 YEARS PRIOR TO THE ACCIDENT.
Full Narrative
ACFT ON A NIGHT XC FLT IN MARGINAL VFR TO IMC CONDITIONS IMPACTED IN AN 80 DEG NOSE DOWN ATTITUDE IN A LEFT SPIRAL. IMMEDIATELY PRIOR TO THE ACCIDENT THE NON-INSTRUMENT RATED PVT PLT HAD INDICATED THAT HE WAS IMC AND WAS GOING TO ATTEMPT TO CLIMB OUT OF IT. RADAR DATA INDICATED THAT THE ACFT STARTED A CLIMBING LEFT TURN AND THEN ENTERED A LEFT SPIRALING DESCENT. INVESTIGATION REVEALED THAT THE ATTITUDE INDICATOR GYRO HAD FAILED AND WAS NOT ROTATING AT OPERATIONAL RPM AT THE TIME OF IMPACT. EXAMINATION OF THE VACUUM PUMP AND THE HSI GYRO INDICATED THAT THEY WERE OPERATING NORMALLY. THERE WAS NO INTERNAL FAILURE IN THE ATTITUDE INDICATOR AND THE REASON FOR THE FAILURE WAS NOT DETERMINED DUE TO THE LEVEL OF DAMAGE SUSTAINED IN THE FIRE WALL AND INSTRUMENT PANEL AREAS. THE PVT PLT HAD LAST PRACTICED INSTRUMENT FLT 3 YEARS PRIOR TO THE ACCIDENT.
Flight
Event TypeAccident
Event Time00:28 CDT
Nearest AirportOklahoma City Int'L (31nm WNW)
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 210M
Tail NumberN750RS
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520-L3A · Reciprocating · 285
Seats6
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 51 · Third Class
Conditions
ConditionsIMC
LightDark Night
Wind40° @ 12 kt
Visibility4 sm
CeilingOvercast 1000 ft
Temperature / Dew Point70 F / 66 F
Altimeter29.00 inHg
Observation Time05:51
Weather SourceWFAC