Narrative:

On descent to lax we were given descent clearance to cross gramm intersection at FL190; then asked to slow to 250 KTS. We were going to be high and fast at gramm intersection so asked approach what he wanted -- speed or altitude. We were cleared to FL190 and 250 KTS with no gramm intersection restr. I selected indicated airspeed descent on FMC to expedite down to FL190. We were given clearance via the civet arrival to runway 24R; a change from what was briefed and planned. I reset the FMC to 7000 ft to comply with civet arrival; but never selected VNAV; resulting in an altitude deviation at camdi of 400-500 ft low. There were 4 distrs in a very short time that contributed to this deviation: 1) change of arrival and runway to runway 24R. 2) accomplishing approach checklist. 3) remaining in indicated airspeed when mentally in VNAV. 4) frequency change. Multiple altitude constraints on civet arrival. Extremely gusty winds and turbulence on approach. A leveloff was accomplished back to 12000 ft and the arrival was resumed with no further incident. No communication was made to ATC; nor reply from ATC. No traffic conflicts were noted.

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Original NASA ASRS Text

Title: MD90 CREW IS TRIPPED UP BY SPEED RESTRICTION AND LATE RWY CHANGE ON THE CIVET 5 IN TO LAX.

Narrative: ON DSCNT TO LAX WE WERE GIVEN DSCNT CLRNC TO CROSS GRAMM INTXN AT FL190; THEN ASKED TO SLOW TO 250 KTS. WE WERE GOING TO BE HIGH AND FAST AT GRAMM INTXN SO ASKED APCH WHAT HE WANTED -- SPD OR ALT. WE WERE CLRED TO FL190 AND 250 KTS WITH NO GRAMM INTXN RESTR. I SELECTED INDICATED AIRSPD DSCNT ON FMC TO EXPEDITE DOWN TO FL190. WE WERE GIVEN CLRNC VIA THE CIVET ARR TO RWY 24R; A CHANGE FROM WHAT WAS BRIEFED AND PLANNED. I RESET THE FMC TO 7000 FT TO COMPLY WITH CIVET ARR; BUT NEVER SELECTED VNAV; RESULTING IN AN ALTDEV AT CAMDI OF 400-500 FT LOW. THERE WERE 4 DISTRS IN A VERY SHORT TIME THAT CONTRIBUTED TO THIS DEV: 1) CHANGE OF ARR AND RWY TO RWY 24R. 2) ACCOMPLISHING APCH CHKLIST. 3) REMAINING IN INDICATED AIRSPD WHEN MENTALLY IN VNAV. 4) FREQ CHANGE. MULTIPLE ALT CONSTRAINTS ON CIVET ARR. EXTREMELY GUSTY WINDS AND TURB ON APCH. A LEVELOFF WAS ACCOMPLISHED BACK TO 12000 FT AND THE ARR WAS RESUMED WITH NO FURTHER INCIDENT. NO COM WAS MADE TO ATC; NOR REPLY FROM ATC. NO TFC CONFLICTS WERE NOTED.

Data retrieved from NASA's ASRS site as of January 2009 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.