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B737 captain reported delaying takeoff for wake turbulence separation when cleared for take-off before the previous aircraft had lifted off.
| Attributes | |
| ACN | 1589845 |
| Time | |
| Date | 201810 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | PHX.Airport |
| State Reference | AZ |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Clearance Deviation - Procedural FAR |
Narrative:
Phx tower has a habit of clearing aircraft for takeoff when the preceding aircraft is not only still on the runway but soon after preceding aircraft was given takeoff clearance. This has resulted in experiencing wake turbulence from the preceding aircraft. On this day; we were cleared into position after a preceding aircraft began his takeoff roll. Before that aircraft was half way down the runway; we were cleared for takeoff. I delayed advancing the throttles until I was sure the preceding aircraft had departed the runway. Tower stated; 'aircraft X; you were cleared for takeoff;' obviously wondering why we had not started our takeoff roll the moment he cleared us. When I saw we had adequate clearance; we started our takeoff roll.rushing aircraft by the tower to comply with their clearances regardless of safety.do not clear a aircraft for takeoff until the preceding aircraft has left the runway. Tower needs to understand that a clearance for takeoff means that they haven given us permission to advance our throttles. Only the captain decides when to advance the throttles after the clearance; not the tower. Phx tower constantly rushes aircraft for takeoff resulting in wake turbulence encounters.
Original NASA ASRS Text
Title: B737 Captain reported delaying takeoff for wake turbulence separation when cleared for take-off before the previous aircraft had lifted off.
Narrative: PHX tower has a habit of clearing aircraft for takeoff when the preceding aircraft is not only still on the runway but soon after preceding aircraft was given takeoff clearance. This has resulted in experiencing wake turbulence from the preceding aircraft. On this day; we were cleared into position after a preceding aircraft began his takeoff roll. Before that aircraft was half way down the runway; we were cleared for takeoff. I delayed advancing the throttles until I was sure the preceding aircraft had departed the runway. Tower stated; 'Aircraft X; you were cleared for takeoff;' obviously wondering why we had not started our takeoff roll the moment he cleared us. When I saw we had adequate clearance; we started our takeoff roll.Rushing aircraft by the tower to comply with their clearances regardless of safety.Do not clear a aircraft for takeoff until the preceding aircraft has left the runway. Tower needs to understand that a clearance for takeoff means that they haven given us permission to advance our throttles. Only the Captain decides when to advance the throttles after the clearance; not the tower. PHX tower constantly rushes aircraft for takeoff resulting in wake turbulence encounters.
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.