<< >> NASA ASRS Report 773890, February 2008

Change of runway assignment coincident with approach controller request to maintain 300 KTS at 10000 MSL; followed by a descent clearance results in a speed deviation below 10000 ft for B747-400.

Attributes
ACN	773890
Time
Date	200802
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival star : janesville
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 6500
ASRS Report	773890
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	non adherence : far other anomaly
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : issued advisory
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance ATC Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon descent on the janesville 4 arrival just prior to dbq received direct jvl. Prior to jvl received direct to krena to cross krena at 10000 ft and 300 KTS. VNAV was programmed for the jvl 4 arrival with appropriate altitudes and speeds. On the descent to krena increased from 280 KTS to 300 KTS using VNAV with speed intervene. While crossing krena at 10000 ft and 300 KTS we received a change of assigned runway from runway 22R to runway 27L and a descent to 6000 ft. While programming the runway change in the FMC we maintained 300 KTS until approximately 7000 ft. Received a clearance to slow to 210 KTS and complied with the speed reduction. The remainder of the flight was uneventful. Reprogramming the runway change was a significant distraction while descending below 10000 ft. Also; a clearance to accelerate to 300 KTS at 10000 ft is somewhat unusual.

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Original NASA ASRS Text

Title: CHANGE OF RWY ASSIGNMENT COINCIDENT WITH APCH CTLR REQUEST TO MAINTAIN 300 KTS AT 10000 MSL; FOLLOWED BY A DESCENT CLRNC RESULTS IN A SPEED DEV BELOW 10000 FT FOR B747-400.

Narrative: UPON DSCNT ON THE JANESVILLE 4 ARR JUST PRIOR TO DBQ RECEIVED DIRECT JVL. PRIOR TO JVL RECEIVED DIRECT TO KRENA TO CROSS KRENA AT 10000 FT AND 300 KTS. VNAV WAS PROGRAMMED FOR THE JVL 4 ARR WITH APPROPRIATE ALTS AND SPDS. ON THE DSCNT TO KRENA INCREASED FROM 280 KTS TO 300 KTS USING VNAV WITH SPD INTERVENE. WHILE XING KRENA AT 10000 FT AND 300 KTS WE RECEIVED A CHANGE OF ASSIGNED RWY FROM RWY 22R TO RWY 27L AND A DSCNT TO 6000 FT. WHILE PROGRAMMING THE RWY CHANGE IN THE FMC WE MAINTAINED 300 KTS UNTIL APPROX 7000 FT. RECEIVED A CLRNC TO SLOW TO 210 KTS AND COMPLIED WITH THE SPD REDUCTION. THE REMAINDER OF THE FLT WAS UNEVENTFUL. REPROGRAMMING THE RWY CHANGE WAS A SIGNIFICANT DISTR WHILE DSNDING BELOW 10000 FT. ALSO; A CLRNC TO ACCELERATE TO 300 KTS AT 10000 FT IS SOMEWHAT UNUSUAL.

Data retrieved from NASA's ASRS site as of May 2009 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.