DC9-32 crew advised by the center controller that they were off altitude.

Attributes
ACN	517070
Time
Date	200107
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zdc.artcc
State Reference	VA
Altitude	msl bound lower : 16000 msl bound upper : 16600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	DC-9 20
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10500 flight time type : 1000
ASRS Report	517070
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : published procedure
Resolutory Action	controller : issued advisory flight crew : returned to assigned altitude none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZDC told us our altitude indicated 16600 ft. I replied we were indicating 16000 ft. We recycled the transponder. No other reports.

Original NASA ASRS Text

Title: DC9-32 CREW ADVISED BY THE CTR CTLR THAT THEY WERE OFF ALT.

Narrative: ZDC TOLD US OUR ALT INDICATED 16600 FT. I REPLIED WE WERE INDICATING 16000 FT. WE RECYCLED THE XPONDER. NO OTHER RPTS.

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.