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NTSB Report
May 31, 1984 · Cessna 172M · N73561
Cheyenne, WY
Overview
Report Status
Preliminary report
Event Type
Accident
Date
May 31, 1984
Injury Outcomes
1 injury (1 minor injury), 3 uninjured
Location
Cheyenne, WY
Aircraft
Cessna 172M
Tail Number
N73561
Operator
Chemaire
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN84LA165
BEFORE THE FLIGHT THE PILOT OBTAINED A WEATHER BRIEFING AND WAS INFORMED OF AN APPROACHING THUNDERSTORM WHICH WAS 10 MILES NORTHWEST OF THE AIRPORT. THE PILOT STATED THAT AFTER A NORMAL TAKEOFF HE CLIMED TO A ALTITUDE OF ABOUT 250 FT AGL, AT 70 KIAS, WHEN HE EXPERIENCED MODERATE TURBULENCE AND THE CLIMB LEVELED OFF. THE PLT THEN CHECKED THE ALTIMETER AND VERTICAL SPEED INDICATOR WHICH HE SAID INDICATED A DESCENT EVEN THOUGH HIS AIRSPEED AND ATTITUDE INDICATED THE ACFT SHOULD BE CLIMBING. UNABLE TO ARREST THE DESCENT, THE ACFT SETTLED INTO AN OPEN FIELD. THE REPORTED CHEYENNE WINDS AT 1959 MDT WERE FROM 340 DEGREES AT 25 KTS GUSTING TO 38 KTS. AT 2052 MDT THE WINDS WERE REPORTED TO BE FROM 020 DEGREES AT 8 KTS. THE THUNDERSTORM WHICH PASSED OVER CHEYENNE AT 1907 MDT WAS REPORTED TO BE A STORM OF LEVEL 1 INTENSITY. THE ELEVATION OFTHE ARPT WAS 6156 FT.
Full Narrative
BEFORE THE FLIGHT THE PILOT OBTAINED A WEATHER BRIEFING AND WAS INFORMED OF AN APPROACHING THUNDERSTORM WHICH WAS 10 MILES NORTHWEST OF THE AIRPORT. THE PILOT STATED THAT AFTER A NORMAL TAKEOFF HE CLIMED TO A ALTITUDE OF ABOUT 250 FT AGL, AT 70 KIAS, WHEN HE EXPERIENCED MODERATE TURBULENCE AND THE CLIMB LEVELED OFF. THE PLT THEN CHECKED THE ALTIMETER AND VERTICAL SPEED INDICATOR WHICH HE SAID INDICATED A DESCENT EVEN THOUGH HIS AIRSPEED AND ATTITUDE INDICATED THE ACFT SHOULD BE CLIMBING. UNABLE TO ARREST THE DESCENT, THE ACFT SETTLED INTO AN OPEN FIELD. THE REPORTED CHEYENNE WINDS AT 1959 MDT WERE FROM 340 DEGREES AT 25 KTS GUSTING TO 38 KTS. AT 2052 MDT THE WINDS WERE REPORTED TO BE FROM 020 DEGREES AT 8 KTS. THE THUNDERSTORM WHICH PASSED OVER CHEYENNE AT 1907 MDT WAS REPORTED TO BE A STORM OF LEVEL 1 INTENSITY. THE ELEVATION OFTHE ARPT WAS 6156 FT.
Flight
Event TypeAccident
Event Time20:00 MDT
Nearest AirportCHEYENNE (1nm WNW)
Runway30
Runway Length6691 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172M
Tail NumberN73561
Aircraft CategoryAir
DamageSubstantial
OperatorChemaire
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2D · Reciprocating · 150
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury), 3 uninjured
Fatal0
Serious0
Minor1
Uninjured3
Total4
Crew 1Age 26 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind340° @ 25 kt, gusting 38 kt
Visibility60 sm
CeilingBroken clouds 8000 ft
Temperature / Dew Point0 C
Altimeter30.00 inHg
Observation Time01:55
Weather SourceWFAC