Flight crew did not comply with the crossing restr, but instead they descended early.

Attributes
ACN	461931
Time
Date	200001
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	navaid : psp.vortac
State Reference	CA
Altitude	msl bound lower : 14000 msl bound upper : 15000
Aircraft 1
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	aircraft equipment : tcas other controllera
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While on the arrival to sna, ZLA gave us bands at 15000 ft, descend and maintain 14000 ft. We crossed bands at 14000 ft, assuming ZLA was just giving us relief on the normal arrival altitude. TCASII showed no targets. The aircraft was level at 14000 ft at bands, and center mentioned that we were to 14000 ft early, but that it was all right. There was no further discussion about the 15000/14000 ft issue. Apparently, ZLA was modifying the arrival, but they did not make it clear that it was for traffic. Hence we adhered to the altitude that was on the arrival.

Original NASA ASRS Text

Title: FLC DID NOT COMPLY WITH THE XING RESTR, BUT INSTEAD THEY DSNDED EARLY.

Narrative: WHILE ON THE ARR TO SNA, ZLA GAVE US BANDS AT 15000 FT, DSND AND MAINTAIN 14000 FT. WE CROSSED BANDS AT 14000 FT, ASSUMING ZLA WAS JUST GIVING US RELIEF ON THE NORMAL ARR ALT. TCASII SHOWED NO TARGETS. THE ACFT WAS LEVEL AT 14000 FT AT BANDS, AND CTR MENTIONED THAT WE WERE TO 14000 FT EARLY, BUT THAT IT WAS ALL RIGHT. THERE WAS NO FURTHER DISCUSSION ABOUT THE 15000/14000 FT ISSUE. APPARENTLY, ZLA WAS MODIFYING THE ARR, BUT THEY DID NOT MAKE IT CLR THAT IT WAS FOR TFC. HENCE WE ADHERED TO THE ALT THAT WAS ON THE ARR.

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.