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A DC10 freighter flight crew mistakenly accepted and read back a heading change clearance as if it was an altitude change clearance.
| Attributes | |
| ACN | 430550 |
| Time | |
| Date | 199903 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : szw.vortac |
| State Reference | FL |
| Altitude | msl bound lower : 26000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 40 |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 13000 flight time type : 4000 |
| ASRS Report | 430550 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10000 flight time type : 3000 |
| ASRS Report | 430202 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : became reoriented |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were climbing to FL260. We accepted and read back a clearance to climb to FL330. Passing FL280 we were contacted by center and told that we were only cleared to FL260. We told him that we read back climb to FL330. He told us that was a clearance to turn to heading 330 degrees. We misunderstood the heading change to be a climb clearance and the controller did not catch the mistake on the readback.
Original NASA ASRS Text
Title: A DC10 FREIGHTER FLC MISTAKENLY ACCEPTED AND READ BACK A HDG CHANGE CLRNC AS IF IT WAS AN ALT CHANGE CLRNC.
Narrative: WE WERE CLBING TO FL260. WE ACCEPTED AND READ BACK A CLRNC TO CLB TO FL330. PASSING FL280 WE WERE CONTACTED BY CTR AND TOLD THAT WE WERE ONLY CLRED TO FL260. WE TOLD HIM THAT WE READ BACK CLB TO FL330. HE TOLD US THAT WAS A CLRNC TO TURN TO HDG 330 DEGS. WE MISUNDERSTOOD THE HDG CHANGE TO BE A CLB CLRNC AND THE CTLR DID NOT CATCH THE MISTAKE ON THE READBACK.
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.