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NTSB Report
November 16, 1987 · Beech 200 · N334DP
Jefferson, WI
Overview
Report Status
Preliminary report
Event Type
Accident
Date
November 16, 1987
Injury Outcomes
8 injuries (8 fatalities)
Location
Jefferson, WI
Aircraft
Beech 200
Tail Number
N334DP
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
CHI88MA026
WHILE CRUISING ABV FRZG LVL AT 12,000', THE FLT WAS CLRD TO DSCND & MAINT 9000'. ABT 1-1/2 MIN LTR, THE FLT DECLARED A MAYDAY (EMERGENCY). RADIO & RADAR CTC WERE LOST & THE ACFT CRASHED IN A NR VERTICAL DSCNT. RADAR DATA SHOWED THAT AFTER STARTING A DSCNT, THE ACFT ENTERED A LEFT/DESCENDING MNVR. SUBSEQUENTLY, THE LEFT OUTBOARD WING PANEL & BOTH ENGS SEPD IN FLT. THE LAST TRANSPONDER REPLY WAS AT 2800'. AN EXAM REVEALED THE LEFT WING PANEL HAD SEPD FM POSITIVE OVERLOAD. NO FATIGUE OR PRE-EXISTING CRACK WAS FND ON ANY FRACTURE AREA. ALSO, DMG WAS FND ON THE LEFT ENG'S INBOARD COWLING THAT MATCHED DMG ON THE VERTICAL & RGT HORIZONTAL STABILIZERS; HOWEVER, SEQUENCE OF COWLING SEPN WAS NOT VERIFIED. THE SEPD WING PANEL & PARTS OF THE ENG COWLING WERE FOUND ABOUT 3/4 MI FM THE MAIN WRECKAGE. AN NTSB TRAJECTORY STUDY INDCD AN IN-FLT SEPN OCCURRED AT AN ALT OF APRX 5600' AS ACFT WAS HDG SE IN A 50 TO 70 DEG DIVE. ELEV TRIM INDCR WAS FND WITH A FULL NOSE UP INDCN. BOTH PLTS WERE INSTRUMENT RATED.
Full Narrative
WHILE CRUISING ABV FRZG LVL AT 12,000', THE FLT WAS CLRD TO DSCND & MAINT 9000'. ABT 1-1/2 MIN LTR, THE FLT DECLARED A MAYDAY (EMERGENCY). RADIO & RADAR CTC WERE LOST & THE ACFT CRASHED IN A NR VERTICAL DSCNT. RADAR DATA SHOWED THAT AFTER STARTING A DSCNT, THE ACFT ENTERED A LEFT/DESCENDING MNVR. SUBSEQUENTLY, THE LEFT OUTBOARD WING PANEL & BOTH ENGS SEPD IN FLT. THE LAST TRANSPONDER REPLY WAS AT 2800'. AN EXAM REVEALED THE LEFT WING PANEL HAD SEPD FM POSITIVE OVERLOAD. NO FATIGUE OR PRE-EXISTING CRACK WAS FND ON ANY FRACTURE AREA. ALSO, DMG WAS FND ON THE LEFT ENG'S INBOARD COWLING THAT MATCHED DMG ON THE VERTICAL & RGT HORIZONTAL STABILIZERS; HOWEVER, SEQUENCE OF COWLING SEPN WAS NOT VERIFIED. THE SEPD WING PANEL & PARTS OF THE ENG COWLING WERE FOUND ABOUT 3/4 MI FM THE MAIN WRECKAGE. AN NTSB TRAJECTORY STUDY INDCD AN IN-FLT SEPN OCCURRED AT AN ALT OF APRX 5600' AS ACFT WAS HDG SE IN A 50 TO 70 DEG DIVE. ELEV TRIM INDCR WAS FND WITH A FULL NOSE UP INDCN. BOTH PLTS WERE INSTRUMENT RATED.
Flight
Event TypeAccident
Event Time08:19 CST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech 200
Tail NumberN334DP
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsP&W · PT6A-42 · Turboprop · 850
Seats10
People & Injuries
Injury Summary8 injuries (8 fatalities)
Fatal8
Serious0
Minor0
Uninjured0
Total8
Crew 1Age 59 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 14 kt
Visibility5 sm
CeilingOvercast 2300 ft
Temperature / Dew Point48 / 43 C
Altimeter29.00 inHg
Observation Time13:53
Weather SourceWFAC