|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||airport : mob.airport|
|Altitude||msl bound lower : 6000|
msl bound upper : 11000
|Operator||general aviation : personal|
|Make Model Name||PA-28 Cherokee Arrow IV|
|Operating Under FAR Part||Part 91|
|Flight Phase||descent : intermediate altitude|
|Route In Use||arrival : on vectors|
|Function||flight crew : single pilot|
|Qualification||pilot : instrument|
pilot : commercial
|Experience||flight time last 90 days : 25|
flight time total : 3200
flight time type : 2600
|Affiliation||government : faa|
|Function||controller : approach|
|Anomaly||altitude deviation : overshoot|
non adherence : clearance
non adherence : far
|Independent Detector||other controllera|
|Resolutory Action||none taken : detected after the fact|
|Problem Areas||ATC Human Performance|
Flight Crew Human Performance
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
ZHU cleared me from 13000-11000 ft and had me call mob approach. I thought, that approach cleared me on down to 6000 ft. Later, a different approach controller said I had only been cleared to 9000 ft. I was busy and apparently heard 6000 ft and wrote that down. If I reported back 6000 ft, no correction was called. If I wrote 6000 ft and called back 9000 ft, that would certainly be my error. I believe I was very busy and perhaps heard 9000 ft, but didn't write it down immediately. What I should have done is check with approach about the altitude before writing down anything. I believe contributing factors may be that I had been cruising for 3+ hours at 13000 ft (with oxygen) and becoming very busy after 3+ hours of very routine cavu cruising.
Original NASA ASRS Text
Title: PA28 PLT DSNDED BELOW CLRED ALT. INATTN AND POOR RADIO TECHNIQUE CONTRIBUTED TO THE ERROR.
Narrative: ZHU CLRED ME FROM 13000-11000 FT AND HAD ME CALL MOB APCH. I THOUGHT, THAT APCH CLRED ME ON DOWN TO 6000 FT. LATER, A DIFFERENT APCH CTLR SAID I HAD ONLY BEEN CLRED TO 9000 FT. I WAS BUSY AND APPARENTLY HEARD 6000 FT AND WROTE THAT DOWN. IF I RPTED BACK 6000 FT, NO CORRECTION WAS CALLED. IF I WROTE 6000 FT AND CALLED BACK 9000 FT, THAT WOULD CERTAINLY BE MY ERROR. I BELIEVE I WAS VERY BUSY AND PERHAPS HEARD 9000 FT, BUT DIDN'T WRITE IT DOWN IMMEDIATELY. WHAT I SHOULD HAVE DONE IS CHK WITH APCH ABOUT THE ALT BEFORE WRITING DOWN ANYTHING. I BELIEVE CONTRIBUTING FACTORS MAY BE THAT I HAD BEEN CRUISING FOR 3+ HRS AT 13000 FT (WITH OXYGEN) AND BECOMING VERY BUSY AFTER 3+ HRS OF VERY ROUTINE CAVU CRUISING.
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.