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A B737-700 flight crew descended without a clearance when they received an unusual 90 degree turn to intercept the localizer.
| Attributes | |
| ACN | 865796 |
| Time | |
| Date | 200912 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | OAK.Airport |
| State Reference | CA |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 250 Flight Crew Type 10000 |
| Person 2 | |
| Function | First Officer |
| Experience | Flight Crew Last 90 Days 220 Flight Crew Type 6700 |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter CFTT / CFIT |
Narrative:
On radar vectors for ILS approach; we were cleared; 'turn right heading two zero zero; intercept the localizer.' this was a ninety degree turn on to final within three miles of the localizer. It seemed unusual to both of us and we discussed it in brief. We both understood a clearance to 2000 ft and set 2000 ft in the altitude window of the MCP using fom procedures (set; point; and respond). ATC called a low altitude alert and told us to climb and maintain 3000 ft. We complied and completed the approach and landing uneventfully.
Original NASA ASRS Text
Title: A B737-700 flight crew descended without a clearance when they received an unusual 90 degree turn to intercept the localizer.
Narrative: On radar vectors for ILS approach; we were cleared; 'Turn right heading two zero zero; intercept the localizer.' This was a ninety degree turn on to final within three miles of the localizer. It seemed unusual to both of us and we discussed it in brief. We both understood a clearance to 2000 FT and set 2000 FT in the altitude window of the MCP using FOM procedures (set; point; and respond). ATC called a low altitude alert and told us to climb and maintain 3000 FT. We complied and completed the approach and landing uneventfully.
Data retrieved from NASA's ASRS site as of April 2012 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.