Altitude deviation altitude overshot in descent.

Attributes
ACN	346310
Time
Date	199609
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : hmv
State Reference	TN
Altitude	msl bound lower : 28750 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
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 : 10000 flight time type : 1500
ASRS Report	346310
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
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:

Requested by ATC to descend from FL330 to FL290 as soon as possible with at least 1500 FPM and make immediate 90 degree turn to left. ATC instructions interrupted several times by other carriers. Thought situation required maximum descent. Descended at 4000 FPM. Overshot altitude by 250 ft, approximately down to 28750 ft. Interpretation of radio calls disrupted communications and delayed receipt of instructions. Expedited descent, rapid descent caused overshoot.

Original NASA ASRS Text

Title: ALTDEV ALT OVERSHOT IN DSCNT.

Narrative: REQUESTED BY ATC TO DSND FROM FL330 TO FL290 ASAP WITH AT LEAST 1500 FPM AND MAKE IMMEDIATE 90 DEG TURN TO L. ATC INSTRUCTIONS INTERRUPTED SEVERAL TIMES BY OTHER CARRIERS. THOUGHT SIT REQUIRED MAX DSCNT. DSNDED AT 4000 FPM. OVERSHOT ALT BY 250 FT, APPROX DOWN TO 28750 FT. INTERP OF RADIO CALLS DISRUPTED COMS AND DELAYED RECEIPT OF INSTRUCTIONS. EXPEDITED DSCNT, RAPID DSCNT CAUSED OVERSHOOT.

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.