The first officer reports that the charted crossing altitude at limma on the lax ILS 25L approach is...

Narrative:

Crossing altitude at limma and glideslope altitude mismatch on ILS 25L lax. The step down altitude at limma (D 7.5 ilax) and glideslope altitude are both published as 1900 feet. But in fact multiple approaches have resulted in being about 100 feet above the actual glideslope if crossing limma at 1900 feet. This is just enough to cause flight automation to miss capturing the glideslope and instead engaging in VNAV altitude approaching limma; rapidly putting the aircraft in an unstable (high) approach state.

Original NASA ASRS Text

Title: The First Officer reports that the charted crossing altitude at LIMMA on the LAX ILS 25L approach is above the glideslope which creates problems with capturing the glideslope and getting stabilized on the approach.

Narrative: Crossing altitude at LIMMA and Glideslope altitude mismatch on ILS 25L LAX. The step down altitude at LIMMA (D 7.5 ILAX) and glideslope altitude are both published as 1900 feet. But in fact multiple approaches have resulted in being about 100 feet above the actual glideslope if crossing LIMMA at 1900 feet. This is just enough to cause flight automation to miss capturing the glideslope and instead engaging in VNAV ALT approaching LIMMA; rapidly putting the aircraft in an unstable (high) approach state.

Data retrieved from NASA's ASRS site 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	1297714
Time
Date	201509
Place
Locale Reference	LAX.Airport
State Reference	CA
Aircraft 1
Make Model Name	Widebody Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

The first officer reports that the charted crossing altitude at limma on the lax ILS 25L approach is above the glideslope which creates problems with capturing the glideslope and getting stabilized on the approach.