<< >> NASA ASRS Report 353021, November 1996

B747-100 crew misunderstood altitude crossing restr. They thought they were to cross eddie instead of karin intersection at FL170. Controller missed mistake in 2 readbacks.

Attributes
ACN	353021
Time
Date	199611
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : kne
State Reference	FO
Altitude	msl bound lower : 17000 msl bound upper : 24000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : rjtg
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 13000 flight time type : 1200
ASRS Report	353021
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : crossing restriction not met non adherence other
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Tokyo control issued a clearance to cross what I thought was eddie intersection at FL170. This is the clearance I read back twice. As we approached karin intersection, ATC asked us if we were going to make this intersection at FL170. We were at about FL240 and descending at the time. It became apparent that they had wanted us at FL170 at karin not eddie as I had read back twice. No loss of separation that I know of. ATC needs to listen up to the readbacks. Often controllers in asian countries tend to just accept whatever you read back. I've been flying this area for 7 yrs and try very hard to listen to, and read back, all clrncs. However, this sort of thing due to pronunciation problems, is not uncommon. During this time we were also trying to conduct approach briefing, etc. This really adds to the confusion!

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Original NASA ASRS Text

Title: B747-100 CREW MISUNDERSTOOD ALT XING RESTR. THEY THOUGHT THEY WERE TO CROSS EDDIE INSTEAD OF KARIN INTXN AT FL170. CTLR MISSED MISTAKE IN 2 READBACKS.

Narrative: TOKYO CTL ISSUED A CLRNC TO CROSS WHAT I THOUGHT WAS EDDIE INTXN AT FL170. THIS IS THE CLRNC I READ BACK TWICE. AS WE APCHED KARIN INTXN, ATC ASKED US IF WE WERE GOING TO MAKE THIS INTXN AT FL170. WE WERE AT ABOUT FL240 AND DSNDING AT THE TIME. IT BECAME APPARENT THAT THEY HAD WANTED US AT FL170 AT KARIN NOT EDDIE AS I HAD READ BACK TWICE. NO LOSS OF SEPARATION THAT I KNOW OF. ATC NEEDS TO LISTEN UP TO THE READBACKS. OFTEN CTLRS IN ASIAN COUNTRIES TEND TO JUST ACCEPT WHATEVER YOU READ BACK. I'VE BEEN FLYING THIS AREA FOR 7 YRS AND TRY VERY HARD TO LISTEN TO, AND READ BACK, ALL CLRNCS. HOWEVER, THIS SORT OF THING DUE TO PRONUNCIATION PROBS, IS NOT UNCOMMON. DURING THIS TIME WE WERE ALSO TRYING TO CONDUCT APCH BRIEFING, ETC. THIS REALLY ADDS TO THE CONFUSION!

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.