<< >> NASA ASRS Report 115619, July 1989

ARTCC radar controller alleges that the flight crew overshot altitude during descent. Clearance was issued to wrong aircraft.

Attributes
ACN	115619
Time
Date	198907
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pie
State Reference	FL
Altitude	msl bound lower : 31000 msl bound upper : 33000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute airway : zma
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 105 flight time total : 12600 flight time type : 700
ASRS Report	115619
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 30000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation

Narrative:

On descent to FL240, going thru approximately FL310 center asked us our assigned altitude. We stated FL240. Center said we were given an amendment to FL330 and that we had acknowledged. We stated that we had not acknowledged, nor did we hear that clearance. At that time we were given a turn and center said he would pull the tape. Another company flight told center that he had just checked at FL330 and that center had not acknowledged. He stated that is what center had heard. An air carrier B flight also confirmed that. We had an air carrier inspector on board. He had a headset on and also confirmed the only clearance he had was to 240.

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Original NASA ASRS Text

Title: ARTCC RADAR CTLR ALLEGES THAT THE FLT CREW OVERSHOT ALT DURING DESCENT. CLRNC WAS ISSUED TO WRONG ACFT.

Narrative: ON DSCNT TO FL240, GOING THRU APPROX FL310 CENTER ASKED US OUR ASSIGNED ALT. WE STATED FL240. CENTER SAID WE WERE GIVEN AN AMENDMENT TO FL330 AND THAT WE HAD ACKNOWLEDGED. WE STATED THAT WE HAD NOT ACKNOWLEDGED, NOR DID WE HEAR THAT CLRNC. AT THAT TIME WE WERE GIVEN A TURN AND CENTER SAID HE WOULD PULL THE TAPE. ANOTHER COMPANY FLT TOLD CENTER THAT HE HAD JUST CHECKED AT FL330 AND THAT CENTER HAD NOT ACKNOWLEDGED. HE STATED THAT IS WHAT CENTER HAD HEARD. AN ACR B FLT ALSO CONFIRMED THAT. WE HAD AN AIR CARRIER INSPECTOR ON BOARD. HE HAD A HEADSET ON AND ALSO CONFIRMED THE ONLY CLRNC HE HAD WAS TO 240.

Data retrieved from NASA's ASRS site as of August 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.