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A B757 flight crew turns early for WX avoidance which led them not to follow company noise abatement procedure.
| Attributes | |
| ACN | 520500 |
| Time | |
| Date | 200108 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : iad.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 200 flight time total : 9000 flight time type : 1000 |
| ASRS Report | 520500 |
| Events | |
| Anomaly | inflight encounter : weather non adherence : published procedure non adherence : company policies |
| Resolutory Action | none taken : detected after the fact |
| Supplementary | |
| Problem Areas | Company Weather Flight Crew Human Performance Environmental Factor Chart Or Publication ATC Human Performance |
| Primary Problem | Weather |
Narrative:
We were departing runway at ZZZ. Our company procedures tell us that for noise abatement we should be past 5 mi from the airport prior to turning. There was an isolated thunderstorm off the departure end (+/-10 NM) when we took off. We had discussed the company noise abatement procedure. When we were +/-1000 ft, departure control told us we could start a turn for WX now (we were about 2 mi off the runway then), without thinking the captain immediately turned to the assigned heading without consideration. I am aware that we should not go through the thunderstorm, but we never told anyone we were an emergency or anything. This may seem trivial and stupid, but the way our operations specifications reads there is not any reason to deviate from the company procedures except for an emergency. Clearly, we used good judgement. My concern is legality. We weren't an emergency, and I think in retrospect it may have not been legal. I think the procedures need to be clarified to allow for exceptions for WX conditions needed for safety.
Original NASA ASRS Text
Title: A B757 FLT CREW TURNS EARLY FOR WX AVOIDANCE WHICH LED THEM NOT TO FOLLOW COMPANY NOISE ABATEMENT PROC.
Narrative: WE WERE DEPARTING RWY AT ZZZ. OUR COMPANY PROCS TELL US THAT FOR NOISE ABATEMENT WE SHOULD BE PAST 5 MI FROM THE ARPT PRIOR TO TURNING. THERE WAS AN ISOLATED TSTM OFF THE DEP END (+/-10 NM) WHEN WE TOOK OFF. WE HAD DISCUSSED THE COMPANY NOISE ABATEMENT PROC. WHEN WE WERE +/-1000 FT, DEP CTL TOLD US WE COULD START A TURN FOR WX NOW (WE WERE ABOUT 2 MI OFF THE RWY THEN), WITHOUT THINKING THE CAPT IMMEDIATELY TURNED TO THE ASSIGNED HDG WITHOUT CONSIDERATION. I AM AWARE THAT WE SHOULD NOT GO THROUGH THE TSTM, BUT WE NEVER TOLD ANYONE WE WERE AN EMER OR ANYTHING. THIS MAY SEEM TRIVIAL AND STUPID, BUT THE WAY OUR OPS SPECS READS THERE IS NOT ANY REASON TO DEVIATE FROM THE COMPANY PROCS EXCEPT FOR AN EMER. CLRLY, WE USED GOOD JUDGEMENT. MY CONCERN IS LEGALITY. WE WEREN'T AN EMER, AND I THINK IN RETROSPECT IT MAY HAVE NOT BEEN LEGAL. I THINK THE PROCS NEED TO BE CLARIFIED TO ALLOW FOR EXCEPTIONS FOR WX CONDITIONS NEEDED FOR SAFETY.
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.