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Flight crew of a B737-300 overshot published departure turn after takeoff due to distrs of altitude changes by ATC for traffic and traffic watch. ATC intervened and questioned heading as the flight crew were turning to appropriate heading.
| Attributes | |
| ACN | 422280 |
| Time | |
| Date | 199812 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sjc |
| State Reference | CA |
| Altitude | msl bound lower : 4000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : commercial pilot : instrument pilot : flight engineer |
| Experience | flight time last 90 days : 140 flight time total : 11860 flight time type : 2152 |
| ASRS Report | 422280 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure other spatial deviation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On departure from sjc runway 30L loupe 9 departure assigned with initial altitude of 5000 ft, on takeoff, altitude changed to 3000 ft due to traffic at sjc in direction of normal turn at 1.8 DME. After switching to departure control, altitude clearance changed to 4000 ft along with TA. The distrs caused by changes in clearance altitude and attempts to visually find the traffic, along with heavy radio chatter combined with minor distrs in the aircraft, caused aircraft to proceed out to 6 DME before turning on assigned heading, instead of at the published point of 1.8 DME. Radio call by departure control confirmed that we were turning and then flew the remainder of procedure as published.
Original NASA ASRS Text
Title: FLC OF A B737-300 OVERSHOT PUBLISHED DEP TURN AFTER TKOF DUE TO DISTRS OF ALT CHANGES BY ATC FOR TFC AND TFC WATCH. ATC INTERVENED AND QUESTIONED HDG AS THE FLC WERE TURNING TO APPROPRIATE HDG.
Narrative: ON DEP FROM SJC RWY 30L LOUPE 9 DEP ASSIGNED WITH INITIAL ALT OF 5000 FT, ON TKOF, ALT CHANGED TO 3000 FT DUE TO TFC AT SJC IN DIRECTION OF NORMAL TURN AT 1.8 DME. AFTER SWITCHING TO DEP CTL, ALT CLRNC CHANGED TO 4000 FT ALONG WITH TA. THE DISTRS CAUSED BY CHANGES IN CLRNC ALT AND ATTEMPTS TO VISUALLY FIND THE TFC, ALONG WITH HVY RADIO CHATTER COMBINED WITH MINOR DISTRS IN THE ACFT, CAUSED ACFT TO PROCEED OUT TO 6 DME BEFORE TURNING ON ASSIGNED HDG, INSTEAD OF AT THE PUBLISHED POINT OF 1.8 DME. RADIO CALL BY DEP CTL CONFIRMED THAT WE WERE TURNING AND THEN FLEW THE REMAINDER OF PROC AS PUBLISHED.
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.