Flight crew descends 800 ft below assigned altitude.

Attributes
ACN	317400
Time
Date	199509
Day	Wed
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : dtw airport : yip
State Reference	MI
Altitude	msl bound lower : 2200 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	DC-8 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : cfi
Experience	flight time last 90 days : 80 flight time total : 6000 flight time type : 450
ASRS Report	317400
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 controllera
Resolutory Action	flight crew : regained aircraft control other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Descended 800 ft below assigned altitude on vectors for a visual approach to runway 05R at yip (2200 ft). Climbed back to 3000 ft and shot ILS runway 05R. Contributing factors: fatigue, non- standard cockpit confign, we fly 3 models of DC8 with a different layout in nearly every plane.

Original NASA ASRS Text

Title: FLC DSNDS 800 FT BELOW ASSIGNED ALT.

Narrative: DSNDED 800 FT BELOW ASSIGNED ALT ON VECTORS FOR A VISUAL APCH TO RWY 05R AT YIP (2200 FT). CLBED BACK TO 3000 FT AND SHOT ILS RWY 05R. CONTRIBUTING FACTORS: FATIGUE, NON- STANDARD COCKPIT CONFIGN, WE FLY 3 MODELS OF DC8 WITH A DIFFERENT LAYOUT IN NEARLY EVERY PLANE.

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.