An MD80 flight crew did not arm the approach mode and flew through the localizer at sfo.

Attributes
ACN	445730
Time
Date	199908
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sfo.airport
State Reference	CA
Environment
Light	Night
Aircraft 1
Controlling Facilities	tracon : o90.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 28r other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
ASRS Report	445730
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	445731
Events
Anomaly	non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : returned to intended or assigned course
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Location: final approach runway 28R ILS. Did not realize that I was cleared to intercept localizer runway 28R and went through localizer. Should have armed localizer. No traffic a factor. Won't repeat this mistake.

Original NASA ASRS Text

Title: AN MD80 FLC DID NOT ARM THE APCH MODE AND FLEW THROUGH THE LOC AT SFO.

Narrative: LOCATION: FINAL APCH RWY 28R ILS. DID NOT REALIZE THAT I WAS CLRED TO INTERCEPT LOC RWY 28R AND WENT THROUGH LOC. SHOULD HAVE ARMED LOC. NO TFC A FACTOR. WON'T REPEAT THIS MISTAKE.

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.