Air carrier mishears intersection name for crossing restriction.

Attributes
ACN	227101
Time
Date	199211
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : emp
State Reference	KS
Altitude	msl bound lower : 11000 msl bound upper : 11000
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Controlling Facilities	artcc : zkc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent other
Route In Use	arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 200 flight time total : 5000 flight time type : 200
ASRS Report	227101
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance non adherence : published procedure
Independent Detector	other controllera other flight crewa
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:

En route from okc to mci aircraft cleared on jhawk arrival emp transition. ATC issued a clearance to cross otter intersection at 11000 ft, 250 KIAS. Crew misunderstood and planned to cross bonnr intersection at 11000 ft, 250 KIAS. 10 mi prior to otter, ATC questioned whether we would make restriction. Confusion between 2 fixes was then eliminated and aircraft vectored off arrival for descent. Recommend one of the fix names be changed. Bonnr and otter sound too much alike.

Original NASA ASRS Text

Title: ACR MISHEARS INTXN NAME FOR XING RESTRICTION.

Narrative: ENRTE FROM OKC TO MCI ACFT CLRED ON JHAWK ARR EMP TRANSITION. ATC ISSUED A CLRNC TO CROSS OTTER INTXN AT 11000 FT, 250 KIAS. CREW MISUNDERSTOOD AND PLANNED TO CROSS BONNR INTXN AT 11000 FT, 250 KIAS. 10 MI PRIOR TO OTTER, ATC QUESTIONED WHETHER WE WOULD MAKE RESTRICTION. CONFUSION BTWN 2 FIXES WAS THEN ELIMINATED AND ACFT VECTORED OFF ARR FOR DSCNT. RECOMMEND ONE OF THE FIX NAMES BE CHANGED. BONNR AND OTTER SOUND TOO MUCH ALIKE.

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.