An air carrier flight crew flying B777 departing lax overshot their assigned altitude by 300 ft.

Attributes
ACN	434170
Time
Date	199904
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl bound lower : 12000 msl bound upper : 12300
Environment
Flight Conditions	IMC
Weather Elements	Rain
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : gabre 5
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : relief pilot
Qualification	pilot : atp pilot : multi engine pilot : cfi pilot : instrument
Experience	flight time last 90 days : 200 flight time total : 15000 flight time type : 200
ASRS Report	434170
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : published procedure non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued alert flight crew : returned to assigned airspace flight crew : became reoriented
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was seated in the jump seat (normal position for a relief pilot) during takeoff. We were climbing out on the gabre 5 departure. The first officer was flying. We were speed restr to 250 KTS from approach control. The altitude assigned was 12000 ft and we were switched to center. The speed restr was lifted by center and during the acceleration phase, upon reaching 12000 ft, the first officer flying continued a climb to approximately 12300 ft. Upon receipt of a warning, he returned to 12000 ft. Total time of deviation 20-30 seconds. Upon initial contact with center we were given several turns for WX and course intercept. Next were immediately assigned FL210. Altitude on this departure is critical for terrain clearance. At our weight we were concerned about performance and altitude restrs.

Original NASA ASRS Text

Title: AN ACR FLC FLYING B777 DEPARTING LAX OVERSHOT THEIR ASSIGNED ALT BY 300 FT.

Narrative: I WAS SEATED IN THE JUMP SEAT (NORMAL POS FOR A RELIEF PLT) DURING TKOF. WE WERE CLBING OUT ON THE GABRE 5 DEP. THE FO WAS FLYING. WE WERE SPD RESTR TO 250 KTS FROM APCH CTL. THE ALT ASSIGNED WAS 12000 FT AND WE WERE SWITCHED TO CTR. THE SPD RESTR WAS LIFTED BY CTR AND DURING THE ACCELERATION PHASE, UPON REACHING 12000 FT, THE FO FLYING CONTINUED A CLB TO APPROX 12300 FT. UPON RECEIPT OF A WARNING, HE RETURNED TO 12000 FT. TOTAL TIME OF DEV 20-30 SECONDS. UPON INITIAL CONTACT WITH CTR WE WERE GIVEN SEVERAL TURNS FOR WX AND COURSE INTERCEPT. NEXT WERE IMMEDIATELY ASSIGNED FL210. ALT ON THIS DEP IS CRITICAL FOR TERRAIN CLRNC. AT OUR WT WE WERE CONCERNED ABOUT PERFORMANCE AND ALT RESTRS.

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.