Airspeed deviation during departure from iah, tx.

Attributes
ACN	479390
Time
Date	200007
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : iah.vortac
State Reference	TX
Altitude	msl single value : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : i90.tracon
Operator	common carrier : air carrier
Make Model Name	Brasilia EMB-120 All Series
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 3100 flight time type : 1800
ASRS Report	479390
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The airspeed deviation that occurred was completely due to complacency. The autoplt on this aircraft climbs at an airspeed between 170 KTS and 155 KTS, depending on model and altitude. We were given an airspeed restr of 160 KTS at 2000 ft and cleared to 11000 ft. Due to the speed restr being a normal climb speed over the time frame of the climb it was forgotten about at leveloff. At leveloff the cruise checklist was completed, and the controller asked what was our indicated airspeed. Immediately we remembered the speed restr and slowed the aircraft to 160 KTS. The speed restr was due to in-trail spacing. The airspace was not congested and the spacing between the other aircraft was at least 10 mi. I feel the complacency was due to the normal airspeed climb, and wide open airspace. The only other factor that may have contributed is that the EMB120 is a very hot aircraft, and that contributes to poor human performance and fatigue.

Original NASA ASRS Text

Title: AIRSPD DEV DURING DEP FROM IAH, TX.

Narrative: THE AIRSPD DEV THAT OCCURRED WAS COMPLETELY DUE TO COMPLACENCY. THE AUTOPLT ON THIS ACFT CLBS AT AN AIRSPD BTWN 170 KTS AND 155 KTS, DEPENDING ON MODEL AND ALT. WE WERE GIVEN AN AIRSPD RESTR OF 160 KTS AT 2000 FT AND CLRED TO 11000 FT. DUE TO THE SPD RESTR BEING A NORMAL CLB SPD OVER THE TIME FRAME OF THE CLB IT WAS FORGOTTEN ABOUT AT LEVELOFF. AT LEVELOFF THE CRUISE CHKLIST WAS COMPLETED, AND THE CTLR ASKED WHAT WAS OUR INDICATED AIRSPD. IMMEDIATELY WE REMEMBERED THE SPD RESTR AND SLOWED THE ACFT TO 160 KTS. THE SPD RESTR WAS DUE TO IN-TRAIL SPACING. THE AIRSPACE WAS NOT CONGESTED AND THE SPACING BTWN THE OTHER ACFT WAS AT LEAST 10 MI. I FEEL THE COMPLACENCY WAS DUE TO THE NORMAL AIRSPD CLB, AND WIDE OPEN AIRSPACE. THE ONLY OTHER FACTOR THAT MAY HAVE CONTRIBUTED IS THAT THE EMB120 IS A VERY HOT ACFT, AND THAT CONTRIBUTES TO POOR HUMAN PERFORMANCE AND FATIGUE.

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.