An S80 flight crew fails to adhere to the stepdown profile of the ILS procedure for runway 4R at ord. PIC, hand flying the aircraft, started down too soon from 5000 ft at the 16 pt 9 DME vice the 14 pt 4 DME. He was distraction in following the erratic localizer and the altitude alerter had been misset.

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Attributes
ACN	389379
Time
Date	199712
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 5000 msl bound upper : 5000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent : approach descent other
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	389379
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	389380
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ATC facility: ord approach. Location: runway 4R localizer, 16.9 DME. While on approach runway 4R ord, I was hand flying the ILS and mistakenly departed 5000 ft at 16.9 DME instead of 14.4 DME. I believe this was due to my being focused on following the localizer which was very erratic. I did not pay enough attention to xchking the approach plate. Supplemental information from acn 389380: the wrong altitude was set for step down. We discovered this, and corrected the problem and continued the approach.

Original NASA ASRS Text

Title: AN S80 FLC FAILS TO ADHERE TO THE STEPDOWN PROFILE OF THE ILS PROC FOR RWY 4R AT ORD. PIC, HAND FLYING THE ACFT, STARTED DOWN TOO SOON FROM 5000 FT AT THE 16 PT 9 DME VICE THE 14 PT 4 DME. HE WAS DISTR IN FOLLOWING THE ERRATIC LOC AND THE ALT ALERTER HAD BEEN MISSET.

Narrative: ATC FACILITY: ORD APCH. LOCATION: RWY 4R LOC, 16.9 DME. WHILE ON APCH RWY 4R ORD, I WAS HAND FLYING THE ILS AND MISTAKENLY DEPARTED 5000 FT AT 16.9 DME INSTEAD OF 14.4 DME. I BELIEVE THIS WAS DUE TO MY BEING FOCUSED ON FOLLOWING THE LOC WHICH WAS VERY ERRATIC. I DID NOT PAY ENOUGH ATTN TO XCHKING THE APCH PLATE. SUPPLEMENTAL INFO FROM ACN 389380: THE WRONG ALT WAS SET FOR STEP DOWN. WE DISCOVERED THIS, AND CORRECTED THE PROB AND CONTINUED THE APCH.

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.