NTSB Identification: FTW88FA032.
The docket is stored on NTSB microfiche number 38159.
Accident occurred Wednesday, November 25, 1987 in PORT MANSFIELD, TX
Probable Cause Approval Date: 08/08/1989
Aircraft: BEECH H35, registration: N5568D
Injuries: 3 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 SVRL WX BRIEFINGS BFR TKOF & WAS ADZD OF CONVECTIVE ACTIVITY ALONG THE INITIAL ROUTE OF FLT NORTH OF THE ARPT. THE PLANNED DEP ROUTE WAS TWD THE WX. WHILE DISCUSSING ALTN ROUTING POSSIBILITIES, THE PLT INDCD HE WOULD ASK ATC FOR DEVIATION ARND THE WX AFTER TKOF. AFTER TKOF, HE CTCD HOUSTON ARTCC & RPRTD CLMBG TO 4000'. THE CTLR (WHO HAD JUST COME ON DUTY) WASN'T EXPECTING THE ACFT & DIDN'T SEE A FLT PROGRESS SLIP FOR N5568D. A DISCUSSION FLWD CONCERNING THE STATUS OF THE FLT PLAN WITH THE CTLR FINALLY CLRG N5568D TO MAINT 4000'. SOON THEREAFTER, RADIO CTC WAS LOST & THE ACFT CRASHED IN WATER (LAGUNA MADRE) ABT 8 MI NORTH OF THE ARPT IN AN AREA OF TSTMS & LOW OVC. THERE WAS EVIDENCE THE ACFT CRASHED IN ABOUT A 10 DEG NOSE DWN ATTITUDE. NO PREIMPACT PART FAILURE OR MALFUNCTION WAS FND. THE RELIEVED ARTCC CTLR SAID HE ADZD THE RELIEVING CTLR THAT N5568D HAD A CLNC, BUT HADN'T RPRTD AIRBORNE. THE RELIEVING CTLR SAID HIS VIEW OF THE FLT PROGRESS SLIP WAS BLOCKED & HE DIDN'T SEE THE SLIP UNTIL 1 MIN LTR. THE PLT HADN'T LOGGED ANY RECENT INST APCHS.

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:

SPATIAL DISORIENTATION..PILOT IN COMMAND



Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..THUNDERSTORM


Contributing Factors

ARTCC SERVICE..INADEQUATE..ATC PERSONNEL(ARTCC)


Contributing Factors

LACK OF RECENT INSTRUMENT TIME..PILOT IN COMMAND


Contributing Factors

DIVERTED ATTENTION..ATC PERSONNEL(ARTCC)


Contributing Factors

ATC CLEARANCE..DELAYED


Contributing Factors

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

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