Flight crew of an medium large transport descended from assigned altitude in response to another air...

Attributes
ACN	326840
Time
Date	199601
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : las
State Reference	NV
Altitude	msl bound lower : 6700 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : las tower : ord
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 270 flight time total : 15000 flight time type : 5000
ASRS Report	326840
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft being vectored for arrival/sequencing. Level at 7000 ft. One pilot off frequency to company, other pilot took clearance to 6000 ft intended for other aircraft. No confirmation of cleared altitude (as only one pilot on frequency, no backup). Descent started out of 7000 ft for 6000 ft by PF (not pilot who entered erroneous altitude). Approach called at 6700 ft stating to maintain 7000 ft. Dialogue resolved that other aircraft was given 6000 ft clearance. No terrain aircraft threat imposed.

Original NASA ASRS Text

Title: FLC OF AN MLG DSNDED FROM ASSIGNED ALT IN RESPONSE TO ANOTHER ACFT'S CLRNC.

Narrative: ACFT BEING VECTORED FOR ARR/SEQUENCING. LEVEL AT 7000 FT. ONE PLT OFF FREQ TO COMPANY, OTHER PLT TOOK CLRNC TO 6000 FT INTENDED FOR OTHER ACFT. NO CONFIRMATION OF CLRED ALT (AS ONLY ONE PLT ON FREQ, NO BACKUP). DSCNT STARTED OUT OF 7000 FT FOR 6000 FT BY PF (NOT PLT WHO ENTERED ERRONEOUS ALT). APCH CALLED AT 6700 FT STATING TO MAINTAIN 7000 FT. DIALOGUE RESOLVED THAT OTHER ACFT WAS GIVEN 6000 FT CLRNC. NO TERRAIN ACFT THREAT IMPOSED.

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.

Flight crew of an medium large transport descended from assigned altitude in response to another aircraft's clearance.