<< >> NASA ASRS Report 280560, August 1994

Spacing on the final approach inadequate for wet runway operations: aircraft cannot exit the runway in a timely manner.

Attributes
ACN	280560
Time
Date	199408
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ord
State Reference	IL
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord tower : ord
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 215 flight time total : 12000 flight time type : 2000
ASRS Report	280560
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : atp pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Intra Facility Coordination Failure other
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

While on ILS runway 14R approach, with rain, into ord we noticed that approach control frequency was very busy. We were turned to intercept ILS runway 14R from a right base and told to keep the speed up until the marker. At this point we noticed the spacing between us and the preceding aircraft was very close and that the preceding aircraft was already starting to 'south turn' as well and listened as ord tower urged the aircraft ahead of us to take the next high speed exit as we were close behind. The preceding aircraft was not able to take the exit as requested by ord tower because of the wet runways and barely exited before we touched down. No sooner had we touched down than ord tower started haranguing us to turn off at the next high speed exit as there was an aircraft close behind us. With the wet runway this was not possible as braking was poor and we barely exited the runway before the following aircraft touched down. The whole point of this report is that ord was trying to accommodate too many aircraft with the existing WX conditions, aircraft spacing was too close. Once on the runway the urging by ord tower to take the next exit could have resulted in an aircraft mishap if complied with. Safety first.

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Original NASA ASRS Text

Title: SPACING ON THE FINAL APCH INADEQUATE FOR WET RWY OPS: ACFT CANNOT EXIT THE RWY IN A TIMELY MANNER.

Narrative: WHILE ON ILS RWY 14R APCH, WITH RAIN, INTO ORD WE NOTICED THAT APCH CTL FREQ WAS VERY BUSY. WE WERE TURNED TO INTERCEPT ILS RWY 14R FROM A R BASE AND TOLD TO KEEP THE SPD UP UNTIL THE MARKER. AT THIS POINT WE NOTICED THE SPACING BTWN US AND THE PRECEDING ACFT WAS VERY CLOSE AND THAT THE PRECEDING ACFT WAS ALREADY STARTING TO 'S TURN' AS WELL AND LISTENED AS ORD TWR URGED THE ACFT AHEAD OF US TO TAKE THE NEXT HIGH SPD EXIT AS WE WERE CLOSE BEHIND. THE PRECEDING ACFT WAS NOT ABLE TO TAKE THE EXIT AS REQUESTED BY ORD TWR BECAUSE OF THE WET RWYS AND BARELY EXITED BEFORE WE TOUCHED DOWN. NO SOONER HAD WE TOUCHED DOWN THAN ORD TWR STARTED HARANGUING US TO TURN OFF AT THE NEXT HIGH SPD EXIT AS THERE WAS AN ACFT CLOSE BEHIND US. WITH THE WET RWY THIS WAS NOT POSSIBLE AS BRAKING WAS POOR AND WE BARELY EXITED THE RWY BEFORE THE FOLLOWING ACFT TOUCHED DOWN. THE WHOLE POINT OF THIS RPT IS THAT ORD WAS TRYING TO ACCOMMODATE TOO MANY ACFT WITH THE EXISTING WX CONDITIONS, ACFT SPACING WAS TOO CLOSE. ONCE ON THE RWY THE URGING BY ORD TWR TO TAKE THE NEXT EXIT COULD HAVE RESULTED IN AN ACFT MISHAP IF COMPLIED WITH. SAFETY FIRST.

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.