Air carrier medium large transport altitude deviation overshot during climb out from clt. The clearance altitude had been set in the window but reverted to 10000 ft when power was cut before taxi by company ground personnel removing the power cart before the APU was on line.

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Attributes
ACN	195377
Time
Date	199111
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : clt
State Reference	NC
Altitude	msl bound lower : 8000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : sid enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 13500 flight time type : 4500
ASRS Report	195377
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12500 flight time type : 2500
ASRS Report	195378
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our clearance was received by printed departure clearance altitude 8000 which was set in window by me and verified by first officer. On climb out off runway 5 we were turned over to departure. We were climbing through 9000 for 10000 which was in window verified by both pilots and reported to clt. He asked us what altitude we were climbing to. We reported 10000. We then remembered the 8000 that was set before, then we recalled that the mechanic had pulled the external power without notifying us to put the APU on line. A power interruption caused the altitude window to revert to 10000 ft.

Original NASA ASRS Text

Title: ACR MLG ALTDEV OVERSHOT DURING CLB OUT FROM CLT. THE CLRNC ALT HAD BEEN SET IN THE WINDOW BUT REVERTED TO 10000 FT WHEN PWR WAS CUT BEFORE TAXI BY CGP REMOVING THE PWR CART BEFORE THE APU WAS ON LINE.

Narrative: OUR CLRNC WAS RECEIVED BY PRINTED DEP CLRNC ALT 8000 WHICH WAS SET IN WINDOW BY ME AND VERIFIED BY FO. ON CLB OUT OFF RWY 5 WE WERE TURNED OVER TO DEP. WE WERE CLBING THROUGH 9000 FOR 10000 WHICH WAS IN WINDOW VERIFIED BY BOTH PLTS AND RPTED TO CLT. HE ASKED US WHAT ALT WE WERE CLBING TO. WE RPTED 10000. WE THEN REMEMBERED THE 8000 THAT WAS SET BEFORE, THEN WE RECALLED THAT THE MECH HAD PULLED THE EXTERNAL PWR WITHOUT NOTIFYING US TO PUT THE APU ON LINE. A PWR INTERRUPTION CAUSED THE ALT WINDOW TO REVERT TO 10000 FT.

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.