NTSB Identification: MKC88FA059.
The docket is stored on NTSB microfiche number 37950.
Nonscheduled 14 CFR
Accident occurred Thursday, March 03, 1988 in VIENNA, MO
Probable Cause Approval Date: 11/28/1989
Aircraft: BEECH E18S, registration: N45A
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.

THE PLT RCVD A WX BRIEFING BFR STARTING A NGT CARGO OPN IN KNOWN ICING CONDS. BFR THE FLT, A LINE SERVICEMAN NOTICED ICE ON THE ACFT'S WINGS & SUGGESTED ITS REMOVAL, BUT THE PLT DECLINED. APRX 45 MIN AFTER TKOF, THE PLT RPRTD TO ARTCC THAT A DE-ICE BOOT HAD 'BLOWN' & HE WAS HAVING DIFFICULTY CTLG THE ACFT. HE SAID THE BOOT WAS 'GOING BACK AND FORTH' & THAT FULL RGT AILERON WAS REQUIRED TO KEEP THE WINGS LEVEL. ALSO, HE RPRTD A CONTINUOUS LOSS OF ALT & SAID THAT FULL RGTAILERON WOULD NOT KEEP THE ACFT FM TURNING TO THE LEFT. SUBSEQUENTLY, THE ACFT CRASHED ON DESCENDING TERRAIN WHILE IN A SLIGHTLY NOSE DOWN, LEFT WING LOW ATTITUDE. MUCH OF THE ACFT (INCLUDING MUCH OF THE LEFT WING) WAS DEMOLISHED BY IMPACT & FIRE. PROP SLASH MARKS INDCD THE ENGS WERE PROVIDING PWR. MAINT RECORDS HAD NO INFO OF REPLACEMENT, REPAIR OR MODIFICATION OF THE DE-ICE BOOTS IN THE PREV 10 YRS. THE PLT'S WIFE INDCD HE HAD PREVIOUSLY BEEN PRESSURED TO FLY ACFT WITH DISCREPANCIES. SIGMETS GOLF 3 & 4 WARNED OF OCNL SEVERE MIXED ICING IN CLOUDS & PRECIP.

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:

ANTI-ICE/DEICE SYSTEM,WING..FAILURE,TOTAL


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

ANTI-ICE/DEICE SYSTEM,WING


Contributing Factors

MAINTENANCE,INSPECTION..INADEQUATE..COMPANY MAINTENANCE PERSONNEL


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..FOG




Contributing Factors

WEATHER CONDITION..ICING CONDITIONS


Contributing Factors

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


Contributing Factors

COMPANY-INDUCED PRESSURE..COMPANY/OPERATOR MANAGEMENT

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