<< >> NASA ASRS Report 507410, April 2001

ARTCC claims altitude assignment that was previously readback by the flight crew was not the actual assignment.

Attributes
ACN	507410
Time
Date	200104
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zma.artcc
State Reference	FL
Altitude	msl bound lower : 28000 msl bound upper : 29000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc
Operator	general aviation : corporate
Make Model Name	Medium Transport
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 15600 flight time type : 600
ASRS Report	507410
Events
Anomaly	altitude deviation : overshoot non adherence : clearance non adherence : published procedure
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

Descending into ZMA, aircraft X was cleared from FL370 to FL270. I was flying the aircraft and listening to the ATIS. The first officer who was talking to ZMA acknowledged the clearance and set FL270 in the altitude select. Upon descending through FL280, ZMA called and said 'aircraft X, maintain FL270. You were assigned to maintain FL290.' we were then switched to another frequency. Both the first officer and I had thought we were cleared to FL270 but apparently we were only cleared to FL290.

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Original NASA ASRS Text

Title: ARTCC CLAIMS ALT ASSIGNMENT THAT WAS PREVIOUSLY READBACK BY THE FLT CREW WAS NOT THE ACTUAL ASSIGNMENT.

Narrative: DSNDING INTO ZMA, ACFT X WAS CLRED FROM FL370 TO FL270. I WAS FLYING THE ACFT AND LISTENING TO THE ATIS. THE FO WHO WAS TALKING TO ZMA ACKNOWLEDGED THE CLRNC AND SET FL270 IN THE ALT SELECT. UPON DSNDING THROUGH FL280, ZMA CALLED AND SAID 'ACFT X, MAINTAIN FL270. YOU WERE ASSIGNED TO MAINTAIN FL290.' WE WERE THEN SWITCHED TO ANOTHER FREQ. BOTH THE FO AND I HAD THOUGHT WE WERE CLRED TO FL270 BUT APPARENTLY WE WERE ONLY CLRED TO FL290.

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.