MD80 crew had altitude overshoot in ZJX class east.

Attributes
ACN	475340
Time
Date	200006
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : pie.airport
State Reference	FL
Altitude	msl bound lower : 12700 msl bound upper : 13000
Environment
Light	Night
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	475340
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	altitude deviation : undershoot non adherence : clearance other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : returned to assigned altitude
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Altitude excursion. While rushing to comply with a tight crossing restr and avoiding cumulo nimbus activity as PF we went about 300 ft below altitude clearance of 13000 ft. Autoplt was in vertical speed and started to round out the descent which would have caused us to miss the crossing altitude so I switched to IAS. We got a frequency change a course change which we had to evaluate on radar. The bottom line is the overload occurred at the time leveloff should have occurred. Climbed back to assigned altitude and continued uneventfully.

Original NASA ASRS Text

Title: MD80 CREW HAD ALT OVERSHOOT IN ZJX CLASS E.

Narrative: ALT EXCURSION. WHILE RUSHING TO COMPLY WITH A TIGHT XING RESTR AND AVOIDING CUMULO NIMBUS ACTIVITY AS PF WE WENT ABOUT 300 FT BELOW ALT CLRNC OF 13000 FT. AUTOPLT WAS IN VERT SPD AND STARTED TO ROUND OUT THE DSCNT WHICH WOULD HAVE CAUSED US TO MISS THE XING ALT SO I SWITCHED TO IAS. WE GOT A FREQ CHANGE A COURSE CHANGE WHICH WE HAD TO EVALUATE ON RADAR. THE BOTTOM LINE IS THE OVERLOAD OCCURRED AT THE TIME LEVELOFF SHOULD HAVE OCCURRED. CLBED BACK TO ASSIGNED ALT AND CONTINUED UNEVENTFULLY.

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.