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Air carrier flight crew misinterp clearance to 11,000' as 10,000'. Error not caught on clearance readback.
| Attributes | |
| ACN | 125665 |
| Time | |
| Date | 198910 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rsw |
| State Reference | FL |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma tower : dca |
| 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 : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 14000 flight time type : 80 |
| ASRS Report | 125665 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 400 |
| ASRS Report | 125946 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While flying from pit to rsw, I thought we were cleared by ZMA to cross 25 north of fmy at 10,000'. I dialed in 10,000' on our DFGS and armed the altitude. Upon reaching 10,000' we were advised we should be at 11,000'. Center quickly came back and said we could stay at 10,000'. After consulting ZMA about the problem, I asked if I should write a report. His reply was no problem, it wouldn't be necessary. But the next day I decided to file this NASA report just in case.
Original NASA ASRS Text
Title: ACR FLT CREW MISINTERP CLRNC TO 11,000' AS 10,000'. ERROR NOT CAUGHT ON CLRNC READBACK.
Narrative: WHILE FLYING FROM PIT TO RSW, I THOUGHT WE WERE CLRED BY ZMA TO CROSS 25 N OF FMY AT 10,000'. I DIALED IN 10,000' ON OUR DFGS AND ARMED THE ALT. UPON REACHING 10,000' WE WERE ADVISED WE SHOULD BE AT 11,000'. CENTER QUICKLY CAME BACK AND SAID WE COULD STAY AT 10,000'. AFTER CONSULTING ZMA ABOUT THE PROBLEM, I ASKED IF I SHOULD WRITE A REPORT. HIS REPLY WAS NO PROBLEM, IT WOULDN'T BE NECESSARY. BUT THE NEXT DAY I DECIDED TO FILE THIS NASA REPORT JUST IN CASE.
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.