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MD80 experiences track deviation on RNAV SID from dfw when autoflt function defaults to heading hld vice RNAV.
| Attributes | |
| ACN | 679509 |
| Time | |
| Date | 200511 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | intersection : shero |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : triss |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 679509 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 679514 |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory controller : issued new clearance flight crew : overcame equipment problem flight crew : returned to intended or assigned course |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance Aircraft |
| Primary Problem | Airport |
Narrative:
We departed dfw runway 17R on the triss two RNAV departure. We were about 1/2 mile right of course at jgirl and the aircraft corrected back to course. After passing triss; the captain directed me to turn on the engine anti-ice to attempt to correct an EPR split as he made a PA regarding turbulence. Ft worth center called and asked if we were direct triss. The captain immediately replied that we were; but we had not noticed that navigation trk had changed to heading hld and we were paralleling course to shero. Center gave us a 20 degree right turn for traffic and we immediately complied. The no autoland light had come on (repeat write-up) and it stayed on for the remainder of the flight. We got distracted.
Original NASA ASRS Text
Title: MD80 EXPERIENCES TRACK DEV ON RNAV SID FROM DFW WHEN AUTOFLT FUNCTION DEFAULTS TO HDG HLD VICE RNAV.
Narrative: WE DEPARTED DFW RWY 17R ON THE TRISS TWO RNAV DEP. WE WERE ABOUT 1/2 MILE R OF COURSE AT JGIRL AND THE ACFT CORRECTED BACK TO COURSE. AFTER PASSING TRISS; THE CAPT DIRECTED ME TO TURN ON THE ENG ANTI-ICE TO ATTEMPT TO CORRECT AN EPR SPLIT AS HE MADE A PA REGARDING TURB. FT WORTH CTR CALLED AND ASKED IF WE WERE DIRECT TRISS. THE CAPT IMMEDIATELY REPLIED THAT WE WERE; BUT WE HAD NOT NOTICED THAT NAV TRK HAD CHANGED TO HDG HLD AND WE WERE PARALLELING COURSE TO SHERO. CTR GAVE US A 20 DEG R TURN FOR TFC AND WE IMMEDIATELY COMPLIED. THE NO AUTOLAND LIGHT HAD COME ON (REPEAT WRITE-UP) AND IT STAYED ON FOR THE REMAINDER OF THE FLT. WE GOT DISTRACTED.
Data retrieved from NASA's ASRS site as of January 2009 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.