Miscom, altitude clearance. Clearance interpretation acknowledge readback hearback disputed.

Attributes
ACN	309490
Time
Date	199507
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lax
State Reference	CA
Altitude	msl bound lower : 10000 msl bound upper : 11000
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
ASRS Report	309490
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	309491
Events
Anomaly	non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

Arriving lax on civet 1, I (the copilot), was flying. We were approaching bremr intersection at 12000 ft. Approach changed our runway to 24R, gave us 10 degree right turn to intercept localizer and descend to 10000 ft . I heard 10000 ft captain read back 10000 ft and I confirmed 10000 ft on AFDS panel descending to the altitude controller said we were supposed to be at 11000 ft. Captain replied that we had readback 10000 ft controller added no further comment. Problem may have arisen during the runway change.

Original NASA ASRS Text

Title: MISCOM, ALT CLRNC. CLRNC INTERP ACKNOWLEDGE READBACK HEARBACK DISPUTED.

Narrative: ARRIVING LAX ON CIVET 1, I (THE COPLT), WAS FLYING. WE WERE APCHING BREMR INTXN AT 12000 FT. APCH CHANGED OUR RWY TO 24R, GAVE US 10 DEG R TURN TO INTERCEPT LOC AND DSND TO 10000 FT . I HEARD 10000 FT CAPT READ BACK 10000 FT AND I CONFIRMED 10000 FT ON AFDS PANEL DSNDING TO THE ALT CTLR SAID WE WERE SUPPOSED TO BE AT 11000 FT. CAPT REPLIED THAT WE HAD READBACK 10000 FT CTLR ADDED NO FURTHER COMMENT. PROB MAY HAVE ARISEN DURING THE RWY CHANGE.

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.