Flight crew of airliner undershoots altitude on descent.

Attributes
ACN	117607
Time
Date	198907
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zdc
State Reference	DC
Altitude	msl bound lower : 12000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 70 flight time total : 7000 flight time type : 50
ASRS Report	117607
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : undershoot 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:

Was questioned by ATC what altitude flight was cleared to. Altitude set in alerter was 14,000. Controller states that flight was cleared lower to 12,000. Were in thunderstorm conditions, crew was avoiding WX.

Original NASA ASRS Text

Title: FLT CREW OF AIRLINER UNDERSHOOTS ALT ON DESCENT.

Narrative: WAS QUESTIONED BY ATC WHAT ALT FLT WAS CLRED TO. ALT SET IN ALERTER WAS 14,000. CTLR STATES THAT FLT WAS CLRED LOWER TO 12,000. WERE IN TSTM CONDITIONS, CREW WAS AVOIDING WX.

Data retrieved from NASA's ASRS site as of August 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.