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DC10 crew departed with their compasses misaligned by 30 degrees. This led to a track deviation after takeoff.
| Attributes | |
| ACN | 589716 |
| Time | |
| Date | 200308 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Rain Thunderstorm |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : takeoff climbout : initial |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 195 flight time total : 13000 flight time type : 1100 |
| ASRS Report | 589716 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : company policies non adherence : far other anomaly other other spatial deviation |
| Independent Detector | atc equipment other atc equipment : radar aircraft equipment other aircraft equipment : compass other controllera |
| Resolutory Action | controller : issued alert flight crew : returned to intended or assigned course none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After takeoff, we were assigned heading 230 degrees. Departure runway 22L. We began our turn towards the assigned heading. Unfortunately the captain and first officer heading indications were off 30 degrees to the right, causing an initial turn to the left which should have been 10 degrees to the right or runway heading. ATC questioned our heading. We responded with our assigned heading of 280 degrees. Our actual heading was approximately 190 degrees. ATC told us to turn to a new heading to make up for our error. We advised ATC of our heading indication problem. We realigned with compass and INS. Continued flight with no further problems. The problem arose on the ground when the instruments were not aligned properly. Both captain and first officer heading indications were reading the same heading, making the error easier to miss. Also contributing to the problem was the radar not working correctly. WX in the vicinity of the airport, and the late evening departure played a role in missing the proper settings, as well as the question of performing a slippery on wet runway departure with a V1 correction.
Original NASA ASRS Text
Title: DC10 CREW DEPARTED WITH THEIR COMPASSES MISALIGNED BY 30 DEGS. THIS LED TO A TRACK DEV AFTER TKOF.
Narrative: AFTER TKOF, WE WERE ASSIGNED HDG 230 DEGS. DEP RWY 22L. WE BEGAN OUR TURN TOWARDS THE ASSIGNED HDG. UNFORTUNATELY THE CAPT AND FO HDG INDICATIONS WERE OFF 30 DEGS TO THE R, CAUSING AN INITIAL TURN TO THE L WHICH SHOULD HAVE BEEN 10 DEGS TO THE R OR RWY HDG. ATC QUESTIONED OUR HDG. WE RESPONDED WITH OUR ASSIGNED HDG OF 280 DEGS. OUR ACTUAL HDG WAS APPROX 190 DEGS. ATC TOLD US TO TURN TO A NEW HDG TO MAKE UP FOR OUR ERROR. WE ADVISED ATC OF OUR HDG INDICATION PROB. WE REALIGNED WITH COMPASS AND INS. CONTINUED FLT WITH NO FURTHER PROBS. THE PROB AROSE ON THE GND WHEN THE INSTS WERE NOT ALIGNED PROPERLY. BOTH CAPT AND FO HDG INDICATIONS WERE READING THE SAME HDG, MAKING THE ERROR EASIER TO MISS. ALSO CONTRIBUTING TO THE PROB WAS THE RADAR NOT WORKING CORRECTLY. WX IN THE VICINITY OF THE ARPT, AND THE LATE EVENING DEP PLAYED A ROLE IN MISSING THE PROPER SETTINGS, AS WELL AS THE QUESTION OF PERFORMING A SLIPPERY ON WET RWY DEP WITH A V1 CORRECTION.
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.