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First officer of an MD80 started descending too early. The ARTCC controller had said expect lower, not cleared.
| Attributes | |
| ACN | 427810 |
| Time | |
| Date | 199902 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : pdz |
| State Reference | CA |
| Altitude | msl bound lower : 15700 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : zla |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time total : 10000 |
| ASRS Report | 427810 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude |
| Independent Detector | other controllera |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After leaving amigo intersection on paradise 2 arrival to lax (10- 2K) the copilot (PF) started a descent out of 16000 ft to cross tejay at 12000 ft as published. ATC controller called (approximately 15700 ft) to verify descending and asked if we just started down on our own. We said yes. He said no problem this time, but the clearance was 'expect' to cross tejay at 12000 ft. I think the copilot heard just 'cross tejay at 12000 ft' in that earlier transmission. The controller then said to continue descent via the arrival.
Original NASA ASRS Text
Title: FO OF AN MD80 STARTED DSNDING TOO EARLY. THE ARTCC CTLR HAD SAID EXPECT LOWER, NOT CLRED.
Narrative: AFTER LEAVING AMIGO INTXN ON PARADISE 2 ARR TO LAX (10- 2K) THE COPLT (PF) STARTED A DSCNT OUT OF 16000 FT TO CROSS TEJAY AT 12000 FT AS PUBLISHED. ATC CTLR CALLED (APPROX 15700 FT) TO VERIFY DSNDING AND ASKED IF WE JUST STARTED DOWN ON OUR OWN. WE SAID YES. HE SAID NO PROB THIS TIME, BUT THE CLRNC WAS 'EXPECT' TO CROSS TEJAY AT 12000 FT. I THINK THE COPLT HEARD JUST 'CROSS TEJAY AT 12000 FT' IN THAT EARLIER XMISSION. THE CTLR THEN SAID TO CONTINUE DSCNT VIA THE ARR.
Data retrieved from NASA's ASRS site as of July 2007 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.