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Although they had been advised they were to maintain 4;000 feet with their takeoff clearance; the flight crew of a B757; already level at 4;000 feet departing iah; when cleared to climb via the mmugs RNAV SID as they were on course to ttaps initiated a climb prior to reaching ttaps which must be crossed at or below 4;000 feet.
| Attributes | |
| ACN | 1186247 |
| Time | |
| Date | 201407 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | I90.TRACON |
| State Reference | TX |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID MMUGS1 |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Not Flying First Officer |
| Experience | Flight Crew Last 90 Days 120 Flight Crew Total 8800 Flight Crew Type 600 |
| Person 2 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 200 Flight Crew Total 20000 Flight Crew Type 8000 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy |
Narrative:
On the MMUGS1 SID - we were given an initial altitude of 4;000 feet and we had leveled. Just before ttaps; ATC cleared us to climb via the SID except maintain 16;000 feet. I set 16;000 feet in the altitude window and the captain who was hand flying asked for VNAV and started the climb.... I then saw the mistake; called 'altitude; altitude' and he immediately corrected. He climbed to 4;300 feet and then corrected. We crossed ttaps at 4;000 feet and then continued the SID.
Original NASA ASRS Text
Title: Although they had been advised they were to maintain 4;000 feet with their takeoff clearance; the flight crew of a B757; already level at 4;000 feet departing IAH; when cleared to climb via the MMUGS RNAV SID as they were on course to TTAPS initiated a climb prior to reaching TTAPS which must be crossed at or below 4;000 feet.
Narrative: On the MMUGS1 SID - we were given an initial altitude of 4;000 feet and we had leveled. Just before TTAPS; ATC cleared us to climb via the SID except maintain 16;000 feet. I set 16;000 feet in the altitude window and the captain who was hand flying asked for VNAV and started the climb.... I then saw the mistake; called 'altitude; altitude' and he immediately corrected. He climbed to 4;300 feet and then corrected. We crossed TTAPS at 4;000 feet and then continued the SID.
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.