S80 altitude deviation on approach dfw.

Attributes
ACN	457131
Time
Date	199912
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl bound lower : 2300 msl bound upper : 3000
Environment
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer only : 36l
Flight Phase	descent : approach descent : intermediate altitude
Route In Use	approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	457131
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
ASRS Report	457130
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : company policies non adherence : published procedure non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : returned to assigned altitude
Supplementary
Problem Areas	Environmental Factor Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Location: localizer runway 36L dfw. I was PNF and we were on runway 36L localizer at 3000 ft inside huton in VFR conditions, runway in sight. I armed the 2300 ft stepdown fix and PF started down early from 3000 ft after I misread DME for stepdown. He descended approximately 300 ft when I caught it. Climbed back up to 3000 ft and then continued approach. No conflict with any traffic was noted and ATC did not say anything.

Original NASA ASRS Text

Title: S80 ALTDEV ON APCH DFW.

Narrative: LOCATION: LOC RWY 36L DFW. I WAS PNF AND WE WERE ON RWY 36L LOC AT 3000 FT INSIDE HUTON IN VFR CONDITIONS, RWY IN SIGHT. I ARMED THE 2300 FT STEPDOWN FIX AND PF STARTED DOWN EARLY FROM 3000 FT AFTER I MISREAD DME FOR STEPDOWN. HE DSNDED APPROX 300 FT WHEN I CAUGHT IT. CLBED BACK UP TO 3000 FT AND THEN CONTINUED APCH. NO CONFLICT WITH ANY TFC WAS NOTED AND ATC DID NOT SAY ANYTHING.

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.