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An air carrier crew was cleared on the phx snobl 3 departure during a full route clearance but read back silow 4. A total of three clearances; include to departure; were read back and acknowledged as silow 4. The crew was east coast based not tuned to west coast verbal sounds.
| Attributes | |
| ACN | 1287008 |
| Time | |
| Date | 201508 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | PHX.Airport |
| State Reference | AZ |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737 Next Generation Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb Parked |
| Route In Use | SID SNOBL3 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Clearance Deviation - Track / Heading All Types |
Narrative:
Location at gate prior to pushback during prep. Pre departure clearance not working due to full route clearance change. Both captain and first officer listened to clearance both of us heard the clearance to be silow 4 instead of snobl 3; and read the clearance back as such. Upon departure at check-in on [departure]; the controller confirmed with us that we were flying the silow 4; at least that is what both of us heard. I read it back as such. At 7000' we were given a turn to quaky which was not on the departure. This is when I questioned the controller and figured out that they had assumed we had been cleared on the snobl 3. It turns out that in phx speak snobl 3 and silow 4 sound a lot alike to two east coast pilots. The first officer and I both heard these clearances three times from two different controllers and still interpreted snobl as silow.recommend name change on these two departures or phonetic spelling when the clearance is in question. In this particular case; however; we didn't realize there was any question in the clearance.
Original NASA ASRS Text
Title: An Air Carrier crew was cleared on the PHX SNOBL 3 Departure during a full route clearance but read back SILOW 4. A total of three clearances; include to Departure; were read back and acknowledged as SILOW 4. The crew was East Coast based not tuned to West Coast verbal sounds.
Narrative: Location at gate prior to pushback during prep. PDC not working due to full route clearance change. Both Captain and First Officer listened to clearance both of us heard the clearance to be SILOW 4 instead of SNOBL 3; and read the clearance back as such. Upon departure at check-in on [Departure]; the Controller confirmed with us that we were flying the SILOW 4; at least that is what both of us heard. I read it back as such. At 7000' we were given a turn to QUAKY which was not on the departure. This is when I questioned the Controller and figured out that they had assumed we had been cleared on the SNOBL 3. It turns out that in PHX speak SNOBL 3 and SILOW 4 sound a lot alike to two east coast Pilots. The F/O and I both heard these clearances three times from two different Controllers and still interpreted SNOBL as SILOW.Recommend name change on these two departures or phonetic spelling when the clearance is in question. In this particular case; however; we didn't realize there was any question in the clearance.
Data retrieved from NASA's ASRS site 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.