NTSB Identification: MKC83FA045
14 CFR Part 91: General Aviation
Accident occurred Friday, December 24, 1982 in DUBUQUE, IA
Probable Cause Approval Date: 12/24/1983
Aircraft: PIPER PA-31-350, registration: N4091U
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 2015 THE FLT CONTACTED ARTCC & REQUESTED DUBUQUE WX. THEY WERE ADVISED THAT DUBUQUE WAS 500 FT INDEFINITE CEILING, SKY OBSCURED, VISIBILITY 1/2 MI FOG & THEY WOULD BE VECTORED FOR A BACK COURSE RWY 13 APCH. THE FLT THEN REQUESTED THE FRONT COURSE APCH TO RWY 31 & THE CONTROLLER ADVISED THE FLT THAT IT WOULD BE VECTORED TO THE ILS FRONT COURSE APPROACH TO RWY 31. APPROXIMATELY 40 SECS LATER THE FLT ADVISED THE CONTROLLER THAT IT WOULD TAKE THE BACK COURSE APCH TO RWY 13.THE LANDING MINIMA FOR A STRAIGHT-IN ILS RWY 31 IS 1/2 MILE VISIBILITY & FOR A STRAIGHT-IN LOC/DME BACK COURSE APCH TO RWY 13 3/4 MILE VISIBILITY. THE ACFT'S WRECKAGE WAS FOUND IN A VALLEY ABOUT 3/4 MILE SHORT OF RWY 13 & APPROXIMATELY 100 FT BELOW THE RWY ELEVATION.

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

IFR PROCEDURE..IMPROPER..PILOT IN COMMAND

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

MINIMUM DESCENT ALTITUDE..BELOW..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..BELOW APPROACH/LANDING MINIMUMS

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