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B737-800 flight crew reported confusion when cleared to 'climb via' the phx FTHLS3 departure that may have led to an altitude excursion.
| Attributes | |
| ACN | 1307390 |
| Time | |
| Date | 201511 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | P50.TRACON |
| State Reference | AZ |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID FTHLS3 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 181 Flight Crew Type 181 |
| Person 2 | |
| Function | Pilot Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 215 |
| Events | |
| Anomaly | Conflict Airborne Conflict Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance |
Narrative:
On the FTHLS3 departure; just prior to vanzz; we were given a clearance to 'climb via except maintain FL210'. The first officer and I both agreed that we understood that we were cleared to continue our climb to FL210 and this deleted our hold down altitude of 8;000 feet at vanzz. As we approached vanzz we received a TCAS TA followed by an RA. We immediately acquired visual contact with other aircraft and the first officer properly responded to RA guidance. After we were clear of the conflict we continued our climb to FL210 without further incident. As we discussed what had occurred; we determined that we may have misinterpreted the ATC controllers instructions and that he intended for us to meet the vanzz crossing restriction before climbing to FL210. We both felt that we had not actually climbed above 8;000 feet before vanzz; but we're not certain.
Original NASA ASRS Text
Title: B737-800 flight crew reported confusion when cleared to 'climb via' the PHX FTHLS3 departure that may have led to an altitude excursion.
Narrative: On the FTHLS3 Departure; just prior to VANZZ; we were given a clearance to 'climb via except maintain FL210'. The FO and I both agreed that we understood that we were cleared to continue our climb to FL210 and this deleted our hold down altitude of 8;000 feet at VANZZ. As we approached VANZZ we received a TCAS TA followed by an RA. We immediately acquired visual contact with other aircraft and the FO properly responded to RA guidance. After we were clear of the conflict we continued our climb to FL210 without further incident. As we discussed what had occurred; we determined that we may have misinterpreted the ATC Controllers instructions and that he intended for us to meet the VANZZ crossing restriction before climbing to FL210. We both felt that we had not actually climbed above 8;000 feet before VANZZ; but we're not certain.
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.