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Flight crew of a B737-100 turned early on a departure SID resulting in ATC complaining about possible traffic conflict and reminding them that they had not been instructed to turn.
| Attributes | |
| ACN | 355650 |
| Time | |
| Date | 199612 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : lga |
| State Reference | NY |
| Altitude | msl bound lower : 2500 msl bound upper : 2500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 |
| Operator | common carrier : air carrier |
| Make Model Name | B737-100 |
| 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 : first officer |
| Qualification | other other : other pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 80 flight time total : 10000 flight time type : 1000 |
| ASRS Report | 355650 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | inflight encounter other non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : exited adverse environment none taken : anomaly accepted |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After deplaning runway 4L, turned to 060 degree heading and began climb to 2500 ft. SID calls for 290 degree heading at 4 DME off 108.7. At approximately 3 mi and 1600-2000 ft, aircraft entered moderate turbulence. Airspeed and vsi showed a decreasing rate of climb and speed. I initiated the left turn to 290 degrees approximately 1 mi before the stated SID requirement. Departure control was advised but the transmission was blocked. By the time the frequency cleared, departure controller queried us on the premature turn and indicated that he had traffic out of teb he was concerned about. He further stated that he did not give us the turn. I was responding to existing conditions at the time with safety of flight my primary concern. Corrective action: slow the flow in and out of ewr. Build a contingency plan for radio frequency congestion.
Original NASA ASRS Text
Title: FLC OF A B737-100 TURNED EARLY ON A DEP SID RESULTING IN ATC COMPLAINING ABOUT POSSIBLE TFC CONFLICT AND REMINDING THEM THAT THEY HAD NOT BEEN INSTRUCTED TO TURN.
Narrative: AFTER DEPLANING RWY 4L, TURNED TO 060 DEG HDG AND BEGAN CLB TO 2500 FT. SID CALLS FOR 290 DEG HDG AT 4 DME OFF 108.7. AT APPROX 3 MI AND 1600-2000 FT, ACFT ENTERED MODERATE TURB. AIRSPD AND VSI SHOWED A DECREASING RATE OF CLB AND SPD. I INITIATED THE L TURN TO 290 DEGS APPROX 1 MI BEFORE THE STATED SID REQUIREMENT. DEP CTL WAS ADVISED BUT THE XMISSION WAS BLOCKED. BY THE TIME THE FREQ CLRED, DEP CTLR QUERIED US ON THE PREMATURE TURN AND INDICATED THAT HE HAD TFC OUT OF TEB HE WAS CONCERNED ABOUT. HE FURTHER STATED THAT HE DID NOT GIVE US THE TURN. I WAS RESPONDING TO EXISTING CONDITIONS AT THE TIME WITH SAFETY OF FLT MY PRIMARY CONCERN. CORRECTIVE ACTION: SLOW THE FLOW IN AND OUT OF EWR. BUILD A CONTINGENCY PLAN FOR RADIO FREQ CONGESTION.
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.