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Air carrier medium large transport flight crew turned prematurely during initial climb out on SID departure resulting departure controller intervening and turning them back on course.
| Attributes | |
| ACN | 503450 |
| Time | |
| Date | 200003 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : sea.airport |
| State Reference | WA |
| Altitude | msl single value : 4000 |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | tracon : s46.tracon tower : orf.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | climbout : initial |
| Route In Use | departure sid : summa 5 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 503450 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued alert other |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Sea 338 degree radial 6 DME. On departure on the summa 5 departure at 4000 ft, we misread our DME as 8 DME when we were actually at 6 DME. We started our turn. ATC immediately saw the turn and gave us a short 30 second vector to rejoin the SID. TCASII showed no conflicting aircraft. The rest of the departure was uneventful.
Original NASA ASRS Text
Title: ACR MLG FLC TURNED PREMATURELY DURING INITIAL CLBOUT ON SID DEP RESULTING DEP CTLR INTERVENING AND TURNING THEM BACK ON COURSE.
Narrative: SEA 338 DEG RADIAL 6 DME. ON DEP ON THE SUMMA 5 DEP AT 4000 FT, WE MISREAD OUR DME AS 8 DME WHEN WE WERE ACTUALLY AT 6 DME. WE STARTED OUR TURN. ATC IMMEDIATELY SAW THE TURN AND GAVE US A SHORT 30 SECOND VECTOR TO REJOIN THE SID. TCASII SHOWED NO CONFLICTING ACFT. THE REST OF THE DEP WAS UNEVENTFUL.
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.