Altitude deviation crossing fuelr intersection during approach into lax.

Attributes
ACN	343872
Time
Date	199608
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 7700 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	MD-11
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 40 flight time total : 6000 flight time type : 1200
ASRS Report	343872
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

At arnes fix (ilax D33.0) I captured the GS because everything looked good (ie, right on GS at 33 DME, 10000 ft MSL). After suzzi (ilax D29) the aircraft nosed over to follow GS. I immediately 'uncaptured' the GS by using the vertical speed wheel so as to not descend below 8000 ft until fuelr (ilax D26.4). The autoplt responded slower than I thought it would and I was 200-300 ft low crossing fuelr. Rest of flight was uneventful. In the future, I will not allow capture of GS until I've reached 2100 ft MSL (prior to limma). Callback conversation with reporter revealed the following information: reporter was aware of the altitude restrs placed along the way of the ILS runway 25L. However, his technique of autoplt use allowed him to descend 300 ft low over fuelr. He plans on using an entirely different technique for GS interception in the future. He simply will not engage the full ILS tracking until passing through 2100 ft. This pilot felt it would be helpful if approach control would announce to aircraft, when cleared for an approach, 'comply with all crossing altitudes.' this means to him, that when cleared for an ILS, the crossing altitudes are still in effect.

Original NASA ASRS Text

Title: ALTDEV XING FUELR INTXN DURING APCH INTO LAX.

Narrative: AT ARNES FIX (ILAX D33.0) I CAPTURED THE GS BECAUSE EVERYTHING LOOKED GOOD (IE, RIGHT ON GS AT 33 DME, 10000 FT MSL). AFTER SUZZI (ILAX D29) THE ACFT NOSED OVER TO FOLLOW GS. I IMMEDIATELY 'UNCAPTURED' THE GS BY USING THE VERT SPD WHEEL SO AS TO NOT DSND BELOW 8000 FT UNTIL FUELR (ILAX D26.4). THE AUTOPLT RESPONDED SLOWER THAN I THOUGHT IT WOULD AND I WAS 200-300 FT LOW XING FUELR. REST OF FLT WAS UNEVENTFUL. IN THE FUTURE, I WILL NOT ALLOW CAPTURE OF GS UNTIL I'VE REACHED 2100 FT MSL (PRIOR TO LIMMA). CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR WAS AWARE OF THE ALT RESTRS PLACED ALONG THE WAY OF THE ILS RWY 25L. HOWEVER, HIS TECHNIQUE OF AUTOPLT USE ALLOWED HIM TO DSND 300 FT LOW OVER FUELR. HE PLANS ON USING AN ENTIRELY DIFFERENT TECHNIQUE FOR GS INTERCEPTION IN THE FUTURE. HE SIMPLY WILL NOT ENGAGE THE FULL ILS TRACKING UNTIL PASSING THROUGH 2100 FT. THIS PLT FELT IT WOULD BE HELPFUL IF APCH CTL WOULD ANNOUNCE TO ACFT, WHEN CLRED FOR AN APCH, 'COMPLY WITH ALL XING ALTS.' THIS MEANS TO HIM, THAT WHEN CLRED FOR AN ILS, THE XING ALTS ARE STILL IN EFFECT.

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.