Atx cargo small transport flight crew altitude overshot in descent.

Attributes
ACN	148225
Time
Date	199006
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : fwa airport : yip
State Reference	IN
Altitude	msl bound lower : 12500 msl bound upper : 18000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 400 flight time type : 50
ASRS Report	148229
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 2200 flight time type : 1200
ASRS Report	148219
Events
Anomaly	altitude deviation : overshoot
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other

Narrative:

We were being stepped down from FL410 for landing in willow run and the captain and I understood the controller on 120.45 to say 'cross cruxx at 9000, descend to and maintain 9000.' we were currently at 18000' MSL. We began the descent and at approximately 15 mi from cruxx at 11000-13000' the controller asked us our altitude. We reported and told him we were going to 9000'. He said, 'I told you to expect to cross cruxx at 9000', but you were cleared at 18000'.' he said we had come too close to some aircraft at 17000' which neither the captain nor I saw. He also said later hi might be giving us a call on the situation. Later he said that he believed that the readback was incorrect on the crossing restriction. Supplemental information from acn 148219: when we landed I called ZOB and asked if action was being taken. He stated that none was!!

Original NASA ASRS Text

Title: ATX CARGO SMT FLT CREW ALT OVERSHOT IN DESCENT.

Narrative: WE WERE BEING STEPPED DOWN FROM FL410 FOR LNDG IN WILLOW RUN AND THE CAPT AND I UNDERSTOOD THE CTLR ON 120.45 TO SAY 'CROSS CRUXX AT 9000, DSND TO AND MAINTAIN 9000.' WE WERE CURRENTLY AT 18000' MSL. WE BEGAN THE DSNT AND AT APPROX 15 MI FROM CRUXX AT 11000-13000' THE CTLR ASKED US OUR ALT. WE RPTED AND TOLD HIM WE WERE GOING TO 9000'. HE SAID, 'I TOLD YOU TO EXPECT TO CROSS CRUXX AT 9000', BUT YOU WERE CLRED AT 18000'.' HE SAID WE HAD COME TOO CLOSE TO SOME ACFT AT 17000' WHICH NEITHER THE CAPT NOR I SAW. HE ALSO SAID LATER HI MIGHT BE GIVING US A CALL ON THE SITUATION. LATER HE SAID THAT HE BELIEVED THAT THE READBACK WAS INCORRECT ON THE XING RESTRICTION. SUPPLEMENTAL INFO FROM ACN 148219: WHEN WE LANDED I CALLED ZOB AND ASKED IF ACTION WAS BEING TAKEN. HE STATED THAT NONE WAS!!

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.