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NTSB Report
July 23, 1992 · Aero Commander 560-F · N560CM
Manville, WY
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 23, 1992
Injury Outcomes
4 injuries (4 fatalities)
Location
Manville, WY
Aircraft
Aero Commander 560-F
Tail Number
N560CM
Operator
Mclaughlin Construction
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN92FA076
DURING A CROSS COUNTRY BUSINESS FLIGHT, WHICH WAS FILED AND FLOWN UNDER INSTRUMENT FLIGHT RULES, THE PILOT AND CONTROLLER HAD NUMEROUS COMMUNICATIONS REGARDING ROUTING AND WEATHER, AND THE AIRCRAFT WAS CIRCUMNAVIGATING WEATHER AREAS. THE PILOT REPORTED ENTERING WHAT HIS STORMSCOPE SHOWED AS A 'CLEAR' AREA AFTER ENCOUNTERING RAIN AND MODERATE TURBULENCE AT TEMPERATURES CONDUCIVE TO STRUCTURAL ICING. THE CONTROLLER NOTED A 1,000 FOOT LOSS OF ALTITUDE FROM THE ASSIGNED CRUISE ALTITUDE OF 17,000 FEET, FOLLOWED BY A LOSS OF ALTITUDE READOUT. SHORTLY THEREAFTER THE AIRCRAFT DISAPPEARED FROM THE CONTROLLER'S RADAR SCOPE. THE WRECKAGE WAS FOUND NEAR THE LAST RADAR FIX. THE AIRPLANE IMPACTED IN A NEAR VERTICAL DESCENT.
NTSB Probable Cause
A LOSS OF CONTROL FOLLOWING FLIGHT INTO WEATHER CONDITIONS CONTAINING THUNDERSTORMS, TURBULENCE AND ICING CONDITIONS. FACTORS WERE: INACCURATE WEATHER EVALUATION AND FLIGHT INTO KNOWN ADVERSE WEATHER BY THE PILOT IN COMMAND.
Full Narrative
DURING A CROSS COUNTRY BUSINESS FLIGHT, WHICH WAS FILED AND FLOWN UNDER INSTRUMENT FLIGHT RULES, THE PILOT AND CONTROLLER HAD NUMEROUS COMMUNICATIONS REGARDING ROUTING AND WEATHER, AND THE AIRCRAFT WAS CIRCUMNAVIGATING WEATHER AREAS. THE PILOT REPORTED ENTERING WHAT HIS STORMSCOPE SHOWED AS A 'CLEAR' AREA AFTER ENCOUNTERING RAIN AND MODERATE TURBULENCE AT TEMPERATURES CONDUCIVE TO STRUCTURAL ICING. THE CONTROLLER NOTED A 1,000 FOOT LOSS OF ALTITUDE FROM THE ASSIGNED CRUISE ALTITUDE OF 17,000 FEET, FOLLOWED BY A LOSS OF ALTITUDE READOUT. SHORTLY THEREAFTER THE AIRCRAFT DISAPPEARED FROM THE CONTROLLER'S RADAR SCOPE. THE WRECKAGE WAS FOUND NEAR THE LAST RADAR FIX. THE AIRPLANE IMPACTED IN A NEAR VERTICAL DESCENT.
Flight
Event TypeAccident
Event Time15:15 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAero Commander 560-F
Tail NumberN560CM
Aircraft CategoryAir
DamageDestroyed
OperatorMclaughlin Construction
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · OIG-540-B1A · Reciprocating · 350
Seats7
People & Injuries
Injury Summary4 injuries (4 fatalities)
Fatal4
Serious0
Minor0
Uninjured0
Total4
Crew 1Age 41 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind230° @ 12 kt, gusting 24 kt
Visibility50 sm
CeilingBroken clouds 25000 ft
Temperature / Dew Point43 C
Altimeter29.00 inHg
Observation Time21:50
Weather SourceWFAC