Air carrier large transport wrong runway approach to mia following vector to IAP ILS approach.

Attributes
ACN	174726
Time
Date	199104
Day	Thu
Place
Locale Reference	airport : mia
State Reference	FL
Altitude	msl bound lower : 800 msl bound upper : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach landing other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 4300 flight time type : 100
ASRS Report	174726
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

While being vectored for an approach at mia, landing to the west and approaching from the west with numerous thunderstorm cells int he vicinity, we as a whole crew thought we were cleared to fly the ILS to 27L, but were told by approach when established on the 27L localizer that we were cleared for the ILS 27R. Due to excessive WX avoidance deviations, we misinterpreted the controller's instructions. On a 5 mi final, we were told we were on the wrong ILS course and should move over to the ILS 27R. At that time we were VMC and sidestepped to the 27R ILS visually. Accomplished an uneventful landing and taxied to the gate. The WX and excessive deviations from the WX and the controller landing aircraft on both runways led to the situation. Controller's vectors were as depicted below.

Original NASA ASRS Text

Title: ACR LGT WRONG RWY APCH TO MIA FOLLOWING VECTOR TO IAP ILS APCH.

Narrative: WHILE BEING VECTORED FOR AN APCH AT MIA, LNDG TO THE W AND APCHING FROM THE W WITH NUMEROUS TSTM CELLS INT HE VICINITY, WE AS A WHOLE CREW THOUGHT WE WERE CLRED TO FLY THE ILS TO 27L, BUT WERE TOLD BY APCH WHEN ESTABLISHED ON THE 27L LOC THAT WE WERE CLRED FOR THE ILS 27R. DUE TO EXCESSIVE WX AVOIDANCE DEVIATIONS, WE MISINTERPRETED THE CTLR'S INSTRUCTIONS. ON A 5 MI FINAL, WE WERE TOLD WE WERE ON THE WRONG ILS COURSE AND SHOULD MOVE OVER TO THE ILS 27R. AT THAT TIME WE WERE VMC AND SIDESTEPPED TO THE 27R ILS VISUALLY. ACCOMPLISHED AN UNEVENTFUL LNDG AND TAXIED TO THE GATE. THE WX AND EXCESSIVE DEVIATIONS FROM THE WX AND THE CTLR LNDG ACFT ON BOTH RWYS LED TO THE SITUATION. CTLR'S VECTORS WERE AS DEPICTED BELOW.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.