NTSB Identification: NYC83FA032
14 CFR Part 91: General Aviation
Accident occurred Friday, November 26, 1982 in MOUNT ALTON, PA
Probable Cause Approval Date: 11/26/1983
Aircraft: CESSNA 172H, registration: N9511H
Injuries: 1 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

WHILE ENROUTE THE PLT REPORTED HE WAS ICING UP & WOULD HAVE TO DIVERT TO BRADFORD. ABOUT 12 MI FROM THE ARPT THE PLT DECLARED AN EMERGENCY STATING HE DIDN'T THINK HE COULD MAKE A MISSED APPROACH WITH THE ICE BUILDUP. THE PLT THEN REPORTED A ROUGH ENGINE & AN AIRSPEED OF ABOUT 70K WITH FULL THROTTLE. JUST PRIOR TO THE CRASH THE PLT REPORTED THAT HE HAD SO MUCH ICE ON HIS WINDSHIELD THAT HE COULDN'T SEE. THE ACFT CRASHED ABOUT 1 MI SHORT OF RWY 32. COATING THE LEADING EDGE OF THE LEFT HORIZONTAL STABILIZER WAS AN ICE BUILDUP WHICH TAPERED IN THICKNESS FROM 1/4 INCH AT THE ROOT TO ABOUT 1-1/2 INCHES AT THE TIP. PIECES OF 3/4 TO ONE INCH THICK ICE WERE FOUND IN THE GROUND SCAR FOUND UNDER THE RIGHT WING. ICING CONDITIONS WERE FORECASTED ALONG THE ROUTE OF FLT.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLIGHT INTO KNOWN ADVERSE WEATHER..CONTINUED..PILOT IN COMMAND

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

WING..ICE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

HORIZONTAL STABILIZER SURFACE..ICE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PROPELLER SYSTEM/ACCESSORIES,BLADE..ICE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

PROPER DESCENT RATE..NOT POSSIBLE..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..TURBULENCE


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

PRECAUTIONARY LANDING..PERFORMED..PILOT IN COMMAND

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