Altitude deviation during misprogramming of the autothrust of an air carrier flight out of hpn, ny.

Attributes
ACN	505080
Time
Date	200103
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : hpn.airport
State Reference	NY
Altitude	msl bound lower : 2000 msl bound upper : 2300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90.tracon
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure sid : ns
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 2930 flight time type : 640
ASRS Report	505080
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : published procedure other anomaly
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Supplementary
Problem Areas	ATC Human Performance Airspace Structure Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

The departure procedure calls for a r-hand turn from runway 16 to a heading of 320 degrees. While turning to 320 degrees, 190 KTS must be maintained. We typically program the FMS to accelerate to 220 KTS or 230 KTS, depending on gross weight, until 3000 ft AGL, then an acceleration to 250 KTS until 10000 ft. After takeoff and during our climb, the autothrottles advanced to accelerate to 220 KTS. Our IFR clearance called for a leveloff at 2000 ft. Since we were trying to maintain 000 ft, I leveled off but the autothrottles caused an acceleration before I was able to disconnect the autothrottles. The aircraft climbed to approximately 2300 ft, 300 ft above our leveloff altitude. To prevent a future occurrence, I feel it is important to fly this departure procedure without autothrottles. The printed departure procedure calls for a 3000 ft leveloff, but our amended leveloff altitude also contributed to the situation.

Original NASA ASRS Text

Title: ALTDEV DURING MISPROGRAMMING OF THE AUTOTHRUST OF AN ACR FLT OUT OF HPN, NY.

Narrative: THE DEP PROC CALLS FOR A R-HAND TURN FROM RWY 16 TO A HDG OF 320 DEGS. WHILE TURNING TO 320 DEGS, 190 KTS MUST BE MAINTAINED. WE TYPICALLY PROGRAM THE FMS TO ACCELERATE TO 220 KTS OR 230 KTS, DEPENDING ON GROSS WT, UNTIL 3000 FT AGL, THEN AN ACCELERATION TO 250 KTS UNTIL 10000 FT. AFTER TKOF AND DURING OUR CLB, THE AUTOTHROTTLES ADVANCED TO ACCELERATE TO 220 KTS. OUR IFR CLRNC CALLED FOR A LEVELOFF AT 2000 FT. SINCE WE WERE TRYING TO MAINTAIN 000 FT, I LEVELED OFF BUT THE AUTOTHROTTLES CAUSED AN ACCELERATION BEFORE I WAS ABLE TO DISCONNECT THE AUTOTHROTTLES. THE ACFT CLBED TO APPROX 2300 FT, 300 FT ABOVE OUR LEVELOFF ALT. TO PREVENT A FUTURE OCCURRENCE, I FEEL IT IS IMPORTANT TO FLY THIS DEP PROC WITHOUT AUTOTHROTTLES. THE PRINTED DEP PROC CALLS FOR A 3000 FT LEVELOFF, BUT OUR AMENDED LEVELOFF ALT ALSO CONTRIBUTED TO THE SIT.

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.