NTSB Identification: NYC83FA060.
The docket is stored on NTSB microfiche number 20405.
Accident occurred Thursday, February 03, 1983 in SUNBURY, PA
Aircraft: AERO COMMANDER 680FL P, registration: N12LF
Injuries: 2 Fatal.

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.

AT APRX 0928 EST, THE PLT OBTAINED A FSS WX BRIEFING BY TELEPHONE. HE WAS BRIEFED ON CONDITIONS OF LOW CEILINGS, FOG, LIGHT RAIN, DRIZZLE, SNOW & BLOWING SNOW ALONG HIS ROUTE. HOWEVER, HE DID NOT ASK ABOUT ICING CONDITIONS & THE BRIEFING DID NOT INCLUDE A FLT PRECAUTION FOR ICING NOR A SIGMET (ISSUED AT 0820 EST) WHICH FORECASTED MODERATE TO SEVERE MIXED ICING. WHILE EN ROUTE, THE PLT MADE SEVERAL ATLITUDE CHANGES BY REQUEST. WHEN HE WAS QUERIED ABOUT A HEADING DEVIATION, HE REPLIED 'WE'RE HAVING A LITTLE PROBLEM.' THIS WAS THE LAST RADIO CONTACT. ATC RECEIVED NO RADIO CALLS CONCERNING ICING PROBLEMS OR AN EMERGENCY. WITNESSES NEAR THE CRASH SITE SAW THE ACFT COME OUT OF THE CLOUDS IN A NEAR VERTICAL DESCENT, ROTATING IN A NOSE DOWN ATTITUDE, THEN IMPACT & BURN. AIRFRAME ICE UP TO 1/2 INCH THICK WAS FOUND ON/NEAR PARTS THAT WERE NOT FIRE DAMAGED.

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

IN-FLIGHT PLANNING/DECISION..INADEQUATE..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:

PREFLIGHT BRIEFING SERVICE..INADEQUATE..ATC PERSONNEL(FSS)

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

STABILIZER..ICE

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

AIRCRAFT PERFORMANCE..DETERIORATED

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

STALL/SPIN..INADVERTENT..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS

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