|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1201 To 1800|
|Locale Reference||atc facility : dfw|
|Altitude||msl bound lower : 9000|
msl bound upper : 11000
|Controlling Facilities||tracon : dfw|
tower : syr
|Operator||common carrier : air carrier|
|Make Model Name||Large Transport, Low Wing, 3 Turbojet Eng|
|Flight Phase||cruise other|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Experience||flight time last 90 days : 200|
flight time total : 10000
flight time type : 8000
|Function||flight crew : first officer|
|Qualification||pilot : instrument|
pilot : commercial
|Anomaly||altitude deviation : overshoot|
non adherence : clearance
|Independent Detector||other controllera|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
After all of this time and experience, I'm very cognizant re attention to those items. On the flight we had new engineer trainers in progress with a check engineer, and at some time about this time a logbook item was brought up from the cabin. I heard the copilot read back 9000' descent to the controller and watched him set it in the altitude alert. To this day he swears he heard 9000'. I'm not going to swear on the bible, but thought that we did. In fact, we had a radio change and while still at higher altitude, read back the 9000' clearance altitude west/O any question. It was after leveling and flying at 9000' for I'm guessing a minute, that our altitude was questioned, that it should have been 11000' instead of 9000'.
Original NASA ASRS Text
Title: CLEARED DESCEND TO 11000', FLT CREW MISUNDERSTOOD AND DESCENDED TO 9000'.
Narrative: AFTER ALL OF THIS TIME AND EXPERIENCE, I'M VERY COGNIZANT RE ATTN TO THOSE ITEMS. ON THE FLT WE HAD NEW ENGINEER TRAINERS IN PROGRESS WITH A CHK ENGINEER, AND AT SOME TIME ABOUT THIS TIME A LOGBOOK ITEM WAS BROUGHT UP FROM THE CABIN. I HEARD THE COPLT READ BACK 9000' DSCNT TO THE CTLR AND WATCHED HIM SET IT IN THE ALT ALERT. TO THIS DAY HE SWEARS HE HEARD 9000'. I'M NOT GOING TO SWEAR ON THE BIBLE, BUT THOUGHT THAT WE DID. IN FACT, WE HAD A RADIO CHANGE AND WHILE STILL AT HIGHER ALT, READ BACK THE 9000' CLRNC ALT W/O ANY QUESTION. IT WAS AFTER LEVELING AND FLYING AT 9000' FOR I'M GUESSING A MINUTE, THAT OUR ALT WAS QUESTIONED, THAT IT SHOULD HAVE BEEN 11000' INSTEAD OF 9000'.
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.