An air carrier B747 flight crew on a maintenance ferry flight climb above their assigned altitude. The departure controller calls this to their attention and then clears them to a higher altitude.

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Attributes
ACN	382170
Time
Date	199709
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mke
State Reference	WI
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mke
Operator	common carrier : air carrier
Make Model Name	B747-SP
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 20400 flight time type : 6000
ASRS Report	382170
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance non adherence : far
Independent Detector	other flight crewa
Resolutory Action	controller : issued new clearance none taken : detected after the fact other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On departure from mke to yqg, our flight was cleared to 11000 ft. First officer was flying and I read back 'cleared to 11000 ft.' no other reply from mke departure until shortly after leaving 10000 ft controller said 'I see you've left 10000 ft already, that's ok, you're cleared to XX000 ft.' (I forget exactly what altitude, but higher than 11000 ft.) I replied that we heard 11000 ft and read that back. Controller said that he gave us 10000 ft, but that it wasn't a problem and then he handed us off to ZAU. Both first officer and I agree that we heard and read back the clearance to 11000 ft. If it turns out that the controller was correct a contributing factor was that shortly after liftoff we experienced a temporary malfunction of #1 cada which caused flags to appear in my (captain's #1) electric altimeter and captain's airspeed indicator. This intermittent malfunction continued to cruise and we ended up diverting to dtw for technical support reasons.

Original NASA ASRS Text

Title: AN ACR B747 FLC ON A MAINT FERRY FLT CLB ABOVE THEIR ASSIGNED ALT. THE DEP CTLR CALLS THIS TO THEIR ATTN AND THEN CLRS THEM TO A HIGHER ALT.

Narrative: ON DEP FROM MKE TO YQG, OUR FLT WAS CLRED TO 11000 FT. FO WAS FLYING AND I READ BACK 'CLRED TO 11000 FT.' NO OTHER REPLY FROM MKE DEP UNTIL SHORTLY AFTER LEAVING 10000 FT CTLR SAID 'I SEE YOU'VE LEFT 10000 FT ALREADY, THAT'S OK, YOU'RE CLRED TO XX000 FT.' (I FORGET EXACTLY WHAT ALT, BUT HIGHER THAN 11000 FT.) I REPLIED THAT WE HEARD 11000 FT AND READ THAT BACK. CTLR SAID THAT HE GAVE US 10000 FT, BUT THAT IT WASN'T A PROB AND THEN HE HANDED US OFF TO ZAU. BOTH FO AND I AGREE THAT WE HEARD AND READ BACK THE CLRNC TO 11000 FT. IF IT TURNS OUT THAT THE CTLR WAS CORRECT A CONTRIBUTING FACTOR WAS THAT SHORTLY AFTER LIFTOFF WE EXPERIENCED A TEMPORARY MALFUNCTION OF #1 CADA WHICH CAUSED FLAGS TO APPEAR IN MY (CAPT'S #1) ELECTRIC ALTIMETER AND CAPT'S AIRSPD INDICATOR. THIS INTERMITTENT MALFUNCTION CONTINUED TO CRUISE AND WE ENDED UP DIVERTING TO DTW FOR TECHNICAL SUPPORT REASONS.

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.