|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : hou|
|Altitude||msl bound lower : 10000|
msl bound upper : 12000
|Controlling Facilities||artcc : zhu|
|Operator||general aviation : corporate|
|Make Model Name||Medium Transport, Low Wing, 2 Turbojet Eng|
|Navigation In Use||Other|
|Flight Phase||descent other|
|Route In Use||arrival star : star|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : cfi|
pilot : atp
|Experience||flight time last 90 days : 120|
flight time total : 10500
flight time type : 500
|Function||flight crew : first officer|
|Qualification||pilot : atp|
|Anomaly||altitude deviation : undershoot|
non adherence : far
other anomaly other
|Independent Detector||other controllera|
|Resolutory Action||controller : issued new clearance|
|Primary Problem||ATC Human Performance|
|Air Traffic Incident||Operational Deviation|
Received clearance from ZHU on 134.5 to cross marit intersection at 12000'. I wrote clearance on my notepad and read back restriction to cross marit at 12000'. (Marit is an intersection on the struck 6 arrival for hou hobby.) ZHU made no comment on my readback. We were then turned over to hou approach on 124.35. I checked in, advising we were at 12000' and had current ATIS. He questioned our assigned altitude and I replied that our assignment was 12000' at marit as received, copied and read back to ZHU. He said we should be at 10000' and he would check with ZHU for verification. He then came back on frequency and said that ZHU said they had assigned us 10000'. We (both pilots) agreed we had been assigned 12000'. I had copied the assigned altitude on my notepad and then read back the assigned altitude as 12000'. ZHU made no comment or attempt to correct, if indeed we had misunderstood the clearance. There was no traffic conflict or alert. Hou approach said, 'there's no problem.' recommendation: listen to all readbacks. This applies to all of us--pilots, controllers, everybody. Do not hesitate to ask for verification of any heading, altitude, airspeed, etc.
Original NASA ASRS Text
Title: CORP MDT READ BACK WRONG ALT. CTLR DID NOT CORRECT WRONG READBACK.
Narrative: RECEIVED CLRNC FROM ZHU ON 134.5 TO CROSS MARIT INTXN AT 12000'. I WROTE CLRNC ON MY NOTEPAD AND READ BACK RESTRICTION TO CROSS MARIT AT 12000'. (MARIT IS AN INTXN ON THE STRUCK 6 ARR FOR HOU HOBBY.) ZHU MADE NO COMMENT ON MY READBACK. WE WERE THEN TURNED OVER TO HOU APCH ON 124.35. I CHKED IN, ADVISING WE WERE AT 12000' AND HAD CURRENT ATIS. HE QUESTIONED OUR ASSIGNED ALT AND I REPLIED THAT OUR ASSIGNMENT WAS 12000' AT MARIT AS RECEIVED, COPIED AND READ BACK TO ZHU. HE SAID WE SHOULD BE AT 10000' AND HE WOULD CHK WITH ZHU FOR VERIFICATION. HE THEN CAME BACK ON FREQ AND SAID THAT ZHU SAID THEY HAD ASSIGNED US 10000'. WE (BOTH PLTS) AGREED WE HAD BEEN ASSIGNED 12000'. I HAD COPIED THE ASSIGNED ALT ON MY NOTEPAD AND THEN READ BACK THE ASSIGNED ALT AS 12000'. ZHU MADE NO COMMENT OR ATTEMPT TO CORRECT, IF INDEED WE HAD MISUNDERSTOOD THE CLRNC. THERE WAS NO TFC CONFLICT OR ALERT. HOU APCH SAID, 'THERE'S NO PROB.' RECOMMENDATION: LISTEN TO ALL READBACKS. THIS APPLIES TO ALL OF US--PLTS, CTLRS, EVERYBODY. DO NOT HESITATE TO ASK FOR VERIFICATION OF ANY HDG, ALT, AIRSPD, ETC.
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.