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NTSB Report
May 16, 1990 · Piper PA-31-350 · N111AY
Dubuque, IA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 16, 1990
Injury Outcomes
No injuries (4 uninjured)
Location
Dubuque, IA
Aircraft
Piper PA-31-350
Tail Number
N111AY
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MKC90LA108
WHILE ON FINAL, DURING A FULL ILS APPROACH, THE ATR RATED PLT SAID THAT HE ENCOUNTERED HEAVY RAIN, EXTREME TURBULENCE, AND A POSSIBLE WIND SHEAR AT ABOUT 600 FEET AGL. HE SAID THAT HE LOST THE LOCALIZER, STARTED A MISSED APPROACH WITH FULL POWER AND A PITCH UP ATTITUDE, BUT THE AIRCRAFT CONTINUED ITS DESCENT AND COLLIDED WITH THE TERRAIN ABOUT 1/2 MILE SHORT OF THE RUNWAY.
NTSB Probable Cause
WEATHER EVALUATION MISJUDGED RESULTING IN UNCONTROLLED DESCENT BY THE PILOT IN COMMAND AND AIRCRAFT CONTROL NOT MAINTAINED BY THE PILOT IN COMMAND.
Full Narrative
WHILE ON FINAL, DURING A FULL ILS APPROACH, THE ATR RATED PLT SAID THAT HE ENCOUNTERED HEAVY RAIN, EXTREME TURBULENCE, AND A POSSIBLE WIND SHEAR AT ABOUT 600 FEET AGL. HE SAID THAT HE LOST THE LOCALIZER, STARTED A MISSED APPROACH WITH FULL POWER AND A PITCH UP ATTITUDE, BUT THE AIRCRAFT CONTINUED ITS DESCENT AND COLLIDED WITH THE TERRAIN ABOUT 1/2 MILE SHORT OF THE RUNWAY.
Flight
Event TypeAccident
Event Time22:50 CDT
Nearest AirportDUBUQUE (1nm SE)
Runway31
Runway Length6498 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-31-350
Tail NumberN111AY
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · TSIO-540-J2BD · Reciprocating · 350
Seats7
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 50 · Second Class
Conditions
ConditionsIMC
LightDark Night
Wind330° @ 20 kt, gusting 30 kt
Visibility2 sm
CeilingOvercast 300 ft
Temperature / Dew Point55 / 55
Altimeter29.00 inHg
Observation Time03:50
Weather SourceWFAC