Lax tower controller described a low altitude event experienced by a aircraft on final for runway 7R...

Narrative:

A B757 received a low altitude alert on approximately 4 mile final runway 07R. I issued the low altitude alert to the B757 and went over to check the ILS panels. As I was checking the ILS panel; the B757 advised me the glide slope signal was weak; and I noticed that the ILS was set for runway 25L. I configured the ILS for runway 07R and advised the B757 that I had reset the ILS. The B757 continued the approach and landed with out incident. During over ocean traffic; I usually leave the ILS for runway 25L/07R in the west configuration (runway 25L) since we do not use this runway for arrivals and departures due to overnight noise abatement. I had already completed this portion of the watch check list when the city closed runway 25R/07L. I must have forgotten to set the ILS for runway 25L/07R to east configuration (07R) when the city closed runway 25R/07L. I usually visually check the ILS panels when I provide the relief briefing to the relieving flm/controller in charge. While the visually check of the panels is not a requirement; it is a personal preference that I usually perform and did not do this time. Had I stayed with my routine when I was relieved from the ground control/controller in charge position; I would have caught this issue. In the future; I need to stay with my routine.

Original NASA ASRS Text

Title: LAX Tower Controller described a Low Altitude event experienced by a aircraft on final for Runway 7R indicating glide slope difficulties; the reporter acknowledging that the ILS configuration was not changed as needed for this late night operation.

Narrative: A B757 received a Low Altitude Alert on approximately 4 mile final Runway 07R. I issued the Low Altitude Alert to the B757 and went over to check the ILS panels. As I was checking the ILS panel; the B757 advised me the glide slope signal was weak; and I noticed that the ILS was set for Runway 25L. I configured the ILS for Runway 07R and advised the B757 that I had reset the ILS. The B757 continued the approach and landed with out incident. During over ocean traffic; I usually leave the ILS for Runway 25L/07R in the west configuration (Runway 25L) since we do not use this runway for arrivals and departures due to overnight noise abatement. I had already completed this portion of the watch check list when the city closed Runway 25R/07L. I must have forgotten to set the ILS for Runway 25L/07R to east configuration (07R) when the City closed Runway 25R/07L. I usually visually check the ILS panels when I provide the relief briefing to the relieving FLM/CIC. While the visually check of the panels is not a requirement; it is a personal preference that I usually perform and did not do this time. Had I stayed with my routine when I was relieved from the GC/CIC position; I would have caught this issue. In the future; I need to stay with my routine.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	995988
Time
Date	201202
Local Time Of Day	1201-1800
Place
Locale Reference	LAX.Airport
State Reference	CA
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Supervisor / CIC
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Lax tower controller described a low altitude event experienced by a aircraft on final for runway 7R indicating glide slope difficulties; the reporter acknowledging that the ILS configuration was not changed as needed for this late night operation.