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When faced with a pilot induced need to choose between track perfection versus avoiding an approach to a stall while flying the clare RNAV SID off runway 17R at dfw; the captain chose the latter and limited bank angle to avoid a flaps up approach to a stall. The first officer and relief pilot worried over; and continually reminded the captain; of the resultant track deviation.
| Attributes | |
| ACN | 1016695 |
| Time | |
| Date | 201206 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | DFW.Airport |
| State Reference | TX |
| Aircraft 1 | |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID CLARE THREE |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight System |
| Person 1 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Commercial |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
The captain was pilot flying as we flew the clare RNAV SID off runway 17R from dfw and during the turn toward swb over trexx he selected heading select mode rather than LNAV. I told him he was in heading select and called out [the resulting] deviation from the SID track. The captain said he was worried about the bank angle LNAV was using and went to heading select to reduce it (LNAV was using a 25-30 degree bank and IAS was 246-248 KTS at a weight of about 400;000 pounds with the flaps up). We were approximately 1.5 miles off the LNAV course at our furthest point before correcting back to course. ATC made no comment about the deviation.
Original NASA ASRS Text
Title: When faced with a pilot induced need to choose between track perfection versus avoiding an approach to a stall while flying the CLARE RNAV SID off Runway 17R at DFW; the Captain chose the latter and limited bank angle to avoid a flaps up approach to a stall. The First Officer and Relief Pilot worried over; and continually reminded the Captain; of the resultant track deviation.
Narrative: The Captain was pilot flying as we flew the Clare RNAV SID off Runway 17R from DFW and during the turn toward SWB over TREXX he selected HDG Select Mode rather than LNAV. I told him he was in heading select and called out [the resulting] deviation from the SID track. The Captain said he was worried about the bank angle LNAV was using and went to HDG select to reduce it (LNAV was using a 25-30 degree bank and IAS was 246-248 KTS at a weight of about 400;000 pounds with the flaps up). We were approximately 1.5 miles off the LNAV course at our furthest point before correcting back to course. ATC made no comment about the deviation.
Data retrieved from NASA's ASRS site as of July 2013 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.