<< >> NASA ASRS Report 117851, July 1989

Flight crew of medium large transport cleared to 10000' MSL read back 10000', but put 11000' in altitude window and climbed to 11000'.

Attributes
ACN	117851
Time
Date	198907
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : gso
State Reference	NC
Altitude	msl bound lower : 10000 msl bound upper : 11000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : cxy
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute airway : rdu
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 135 flight time total : 11000 flight time type : 2000
ASRS Report	117851
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 5000 flight time type : 500
ASRS Report	118056
Events
Anomaly	non adherence : clearance other anomaly
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed rdu for gso. Initially assigned and leveled at 5000'. After a few mins at 5000' we were cleared to what later recalled to be 11000' (at least that is the altitude I set in the altitude alerter and we leveled at 11000'). A couple mins later the controller asked our altitude and I told him 11000'. We were told to immediately descend to 10000', which we did. The controller asked why we had been at 11000'. I replied that we had been assigned 11000' and that was what I had read back. After termination of the flight I was asked to call rdu approach which I did and was informed they had pulled the tapes and that we had been assigned and read back 10000'.

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Original NASA ASRS Text

Title: FLT CREW OF MLG CLEARED TO 10000' MSL READ BACK 10000', BUT PUT 11000' IN ALT WINDOW AND CLIMBED TO 11000'.

Narrative: DEPARTED RDU FOR GSO. INITIALLY ASSIGNED AND LEVELED AT 5000'. AFTER A FEW MINS AT 5000' WE WERE CLRED TO WHAT LATER RECALLED TO BE 11000' (AT LEAST THAT IS THE ALT I SET IN THE ALT ALERTER AND WE LEVELED AT 11000'). A COUPLE MINS LATER THE CTLR ASKED OUR ALT AND I TOLD HIM 11000'. WE WERE TOLD TO IMMEDIATELY DSND TO 10000', WHICH WE DID. THE CTLR ASKED WHY WE HAD BEEN AT 11000'. I REPLIED THAT WE HAD BEEN ASSIGNED 11000' AND THAT WAS WHAT I HAD READ BACK. AFTER TERMINATION OF THE FLT I WAS ASKED TO CALL RDU APCH WHICH I DID AND WAS INFORMED THEY HAD PULLED THE TAPES AND THAT WE HAD BEEN ASSIGNED AND READ BACK 10000'.

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.