<< >> NASA ASRS Report 851364, September 2009

Air carrier flight crew reported descending slightly below the published altitude at gaate during the ILS 25 approach to lax. Sct controller questioned the crew due to this being a common occurrence on this approach.

Attributes
ACN	851364
Time
Date	200909
Local Time Of Day	1201-1800
Place
Locale Reference	LAX.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Person 2
Function	Pilot Flying First Officer
Events
Anomaly	Deviation - Altitude Crossing Restriction Not Met Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

After crossing gaate on the 25 ILS into lax we were queried on our altitude crossing. The first officer was hand flying and was leveling off at 5000 ft but descended approximately 150 below to 4850 ft. ATC asked if we were following the glideslope; I responded no; we were following the step-downs and the next was hunda at 3700 ft. He then said he wanted to know because many aircraft were low at gaate. I did state we were 'about 150 ft low' at gaate.

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Original NASA ASRS Text

Title: Air carrier flight crew reported descending slightly below the published altitude at GAATE during the ILS 25 approach to LAX. SCT Controller questioned the crew due to this being a common occurrence on this approach.

Narrative: After crossing GAATE on the 25 ILS into LAX we were queried on our altitude crossing. The First Officer was hand flying and was leveling off at 5000 FT but descended approximately 150 below to 4850 FT. ATC asked if we were following the glideslope; I responded no; we were following the step-downs and the next was HUNDA at 3700 FT. He then said he wanted to know because many aircraft were low at GAATE. I did state we were 'about 150 FT low' at GAATE.

Data retrieved from NASA's ASRS site as of April 2012 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.