MD80S aircraft overshot descent by 350 ft.

Attributes
ACN	385040
Time
Date	199711
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 10750 msl bound upper : 11000
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	385040
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During descent to 11000 ft, captain flying, autoplt on, captain disconnected autoplt and descended to 10750 ft then climbed right back to 11000 ft. Approach made no mention of the deviation. I was answering a flight attendant on the interphone and hung up as I noticed the deviation.

Original NASA ASRS Text

Title: MD80S ACFT OVERSHOT DSCNT BY 350 FT.

Narrative: DURING DSCNT TO 11000 FT, CAPT FLYING, AUTOPLT ON, CAPT DISCONNECTED AUTOPLT AND DSNDED TO 10750 FT THEN CLBED RIGHT BACK TO 11000 FT. APCH MADE NO MENTION OF THE DEV. I WAS ANSWERING A FLT ATTENDANT ON THE INTERPHONE AND HUNG UP AS I NOTICED THE DEV.

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.