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An air carrier flight crew flying a B737-300 near dfw fails to intercept a radial as depicted on the SID and as instructed by ATC.
| Attributes | |
| ACN | 483251 |
| Time | |
| Date | 200008 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : ttt.vor |
| State Reference | TX |
| Altitude | msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 220 flight time total : 5000 flight time type : 1100 |
| ASRS Report | 483251 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : atp |
| ASRS Report | 483250 |
| Events | |
| Anomaly | non adherence : company policies non adherence : published procedure non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : became reoriented flight crew : returned to intended or assigned course |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Our flight was climbing to FL310 on our departure. We were assigned a 300 degree heading to intercept the TTT (maverick) 285 degree radial on the worth 2 departure. As we approached the radial, flight attendant 'a' came to the cockpit and served us water. Shortly after this, ZFW cleared us direct to our destination. ZFW then immediately asked us about our position and upon xrefing the first officer CDI we realized we were possibly a few degrees north of the SID radial and that our LNAV had become disengaged. The LNAV had previously been engaged to intercept the desired 285 degree radial on our intercept heading. The remainder of the flight was uneventful. Accessing this incident, I think I allowed myself to be distracted at a point in the flight that I perceived as non-threatening. The aircraft was on autoplt with the LNAV engaged to fly our profile. Increased vigilance should prevent recurrence.
Original NASA ASRS Text
Title: AN ACR FLC FLYING A B737-300 NEAR DFW FAILS TO INTERCEPT A RADIAL AS DEPICTED ON THE SID AND AS INSTRUCTED BY ATC.
Narrative: OUR FLT WAS CLBING TO FL310 ON OUR DEP. WE WERE ASSIGNED A 300 DEG HDG TO INTERCEPT THE TTT (MAVERICK) 285 DEG RADIAL ON THE WORTH 2 DEP. AS WE APCHED THE RADIAL, FLT ATTENDANT 'A' CAME TO THE COCKPIT AND SERVED US WATER. SHORTLY AFTER THIS, ZFW CLRED US DIRECT TO OUR DEST. ZFW THEN IMMEDIATELY ASKED US ABOUT OUR POS AND UPON XREFING THE FO CDI WE REALIZED WE WERE POSSIBLY A FEW DEGS N OF THE SID RADIAL AND THAT OUR LNAV HAD BECOME DISENGAGED. THE LNAV HAD PREVIOUSLY BEEN ENGAGED TO INTERCEPT THE DESIRED 285 DEG RADIAL ON OUR INTERCEPT HEADING. THE REMAINDER OF THE FLT WAS UNEVENTFUL. ACCESSING THIS INCIDENT, I THINK I ALLOWED MYSELF TO BE DISTRACTED AT A POINT IN THE FLT THAT I PERCEIVED AS NON-THREATENING. THE ACFT WAS ON AUTOPLT WITH THE LNAV ENGAGED TO FLY OUR PROFILE. INCREASED VIGILANCE SHOULD PREVENT RECURRENCE.
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.