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MD80 PIC misunderstand departure speed restr and accelerate from the assigned speed of 250 KTS to 300 KTS.
| Attributes | |
| ACN | 498540 |
| Time | |
| Date | 200101 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax.airport |
| State Reference | CA |
| Altitude | msl bound lower : 9000 msl bound upper : 15000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 498540 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : clearance other anomaly |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory |
| Consequence | faa : reviewed incident with flight crew other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After departure, we were cleared to 9000 ft and 250 KTS. Later, we were cleared to 15000 ft. During climb, I accelerated to 300 KTS. Socal (frequency 125.2) asked if we were restr, to which I replied no. I realized later that we were restr, but I understood the speed restr to mean accelerate to 250 KTS because of other departing aircraft. I did not understand it was a do not exceed 250 KTS, when my first officer said was the clearance. When we were cleared above 10000 ft, a restr was not reissued, which I understand was not necessary. I called socal in rno. The supervisor said there was no conflict and said I should expect that restr leaving lax.
Original NASA ASRS Text
Title: MD80 PIC MISUNDERSTAND DEP SPD RESTR AND ACCELERATE FROM THE ASSIGNED SPD OF 250 KTS TO 300 KTS.
Narrative: AFTER DEP, WE WERE CLRED TO 9000 FT AND 250 KTS. LATER, WE WERE CLRED TO 15000 FT. DURING CLB, I ACCELERATED TO 300 KTS. SOCAL (FREQ 125.2) ASKED IF WE WERE RESTR, TO WHICH I REPLIED NO. I REALIZED LATER THAT WE WERE RESTR, BUT I UNDERSTOOD THE SPD RESTR TO MEAN ACCELERATE TO 250 KTS BECAUSE OF OTHER DEPARTING ACFT. I DID NOT UNDERSTAND IT WAS A DO NOT EXCEED 250 KTS, WHEN MY FO SAID WAS THE CLRNC. WHEN WE WERE CLRED ABOVE 10000 FT, A RESTR WAS NOT REISSUED, WHICH I UNDERSTAND WAS NOT NECESSARY. I CALLED SOCAL IN RNO. THE SUPVR SAID THERE WAS NO CONFLICT AND SAID I SHOULD EXPECT THAT RESTR LEAVING LAX.
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.