Narrative:

Departed lax for mexico. Given 250 KT speed restr by socal. Restr deleted out of 8000 ft. First officer flying. Momentarily thinking we were above 10000 ft, started increase to normal climb speed. I was looking at chart for radial from mzb to tij. It is only 20 mi leg and difficult to see. Then came a frequency change before we both noticed the aircraft now at 300 KTS at 8500 ft. The first officer climbed immediately to reduce speed to 250 KTS. No conflict occurred. Ways to prevent: verbalizing intentions, mode control with autothrottle engaged would have required noticeable physical movement to change speed, increased vigilance by all of us.

Google
 

Original NASA ASRS Text

Title: A B727 DEPARTING OUT OF SAN FLIES AN AIRSPD OF 300 KIAS AT 8000 FT.

Narrative: DEPARTED LAX FOR MEXICO. GIVEN 250 KT SPD RESTR BY SOCAL. RESTR DELETED OUT OF 8000 FT. FO FLYING. MOMENTARILY THINKING WE WERE ABOVE 10000 FT, STARTED INCREASE TO NORMAL CLB SPD. I WAS LOOKING AT CHART FOR RADIAL FROM MZB TO TIJ. IT IS ONLY 20 MI LEG AND DIFFICULT TO SEE. THEN CAME A FREQ CHANGE BEFORE WE BOTH NOTICED THE ACFT NOW AT 300 KTS AT 8500 FT. THE FO CLBED IMMEDIATELY TO REDUCE SPD TO 250 KTS. NO CONFLICT OCCURRED. WAYS TO PREVENT: VERBALIZING INTENTIONS, MODE CTL WITH AUTOTHROTTLE ENGAGED WOULD HAVE REQUIRED NOTICEABLE PHYSICAL MOVEMENT TO CHANGE SPD, INCREASED VIGILANCE BY ALL OF US.

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.