NTSB Identification: ATL89FA058.
The docket is stored on NTSB microfiche number 38786.
Accident occurred Thursday, December 22, 1988 in BLOOMVILLE, OH
Probable Cause Approval Date: 06/19/1991
Aircraft: CESSNA 414, registration: N84UM
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.

APRX 2 MIN AFTER THE FLT (N84UM) HAD CLIMBED & LEVELED AT FL 290, THE ARTCC CTLR NOTICED THERE WAS NO RETURN FM THE ACFT'S TRANSPONDER. THE CTLR TRANSMITTED AN ADZY, BUT GOT NO REPLY. HE MADE SVRL MORE RADIO CALLS & RCVD 2 REPLIES. LATER, A REVIEW OF THE RADIO TRANSCRIPT INDCD THE PLT'S 1ST REPLY WAS SOMETHING ABOUT 'ICE.' IN HIS 2ND RESPONSE TO AN INQUIRY FM THE CTLR ABOUT 'HOW DO YOU HEAR ME,' HE REPLIED 'GOOD.' AFTER THAT THERE WAS NO FURTHER CONTACT WITH THE FLT. WRECKAGE FM THE ACFT WAS FOUND SCATTERED OVER A 6 MI AREA, INDCG AN IN-FLT BREAKUP. PIECES FROM THE HORIZONTAL STABILIZERS WERE FOUND FM 2 TO 6 MI FM THE MAIN WRECKAGE. THE RGT WING WAS FOUND 2 MI FM THE MAIN WRECKAGE & THE LEFT OUTBOARD WING PANEL WAS FOUND ABOUT 1 MI FM THE RGT WING. DRG A PREFLT BRIEFING, THE PLT WAS ADZD OF TURBC & ICING CONDS; HE WAS TOLD TO EXPECT LGT TO MOD RIME ICING IN CLOUDS THRU 15,000', BUT THE ACFT WAS EQUIPPED FOR FLT IN ICING CONDS. A CHECK OF THE PLT'S LIVER FLUID SHOWED A BENZOYLECGONINE (COCAINE METABOLITE) LVL OF 0.136 MG/L.

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

AIRCRAFT CONTROL..NOT MAINTAINED..PILOT IN COMMAND

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

DESIGN STRESS LIMITS OF AIRCRAFT..EXCEEDED..PILOT IN COMMAND



Contributing Factors

WEATHER CONDITION..CLOUDS


Contributing Factors

IMPAIRMENT(DRUGS)..PILOT IN COMMAND




Contributing Factors

WEATHER CONDITION..ICING CONDITIONS


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