A300 flight crew encounters severe turbulence while en route causing cabin crew injuries.

Attributes
ACN	584753
Time
Date	200306
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : grann
State Reference	FO
Altitude	msl single value : 30000
Environment
Flight Conditions	IMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zsu.artcc
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : other oceanic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	584753
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	584754
Events
Anomaly	altitude deviation : excursion from assigned altitude cabin event other inflight encounter : turbulence
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : landed as precaution flight crew : declared emergency
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Cabin Crew Human Performance Weather
Primary Problem	Weather

Narrative:

We leveled off at FL300 in IMC. Encountered light chop with only sporadic green showing on radar. Seat belt sign on. Slowed to .75 mach/275 KIAS. Sudden severe turbulence encountered for 30 seconds -- no warning. Maximum altitude deviation 150 ft and vsi of 1500 FPM. Captain called flight attendants and informed one of them knocked unconscious for 60 seconds and 4 others thrown to floor. No passenger injured. Elected to divert to sju for medical care and air carrier inspection. Emergency declared and dispatch notified. Landed smoothly with no further incidents.

Original NASA ASRS Text

Title: A300 FLT CREW ENCOUNTERS SEVERE TURB WHILE ENRTE CAUSING CABIN CREW INJURIES.

Narrative: WE LEVELED OFF AT FL300 IN IMC. ENCOUNTERED LIGHT CHOP WITH ONLY SPORADIC GREEN SHOWING ON RADAR. SEAT BELT SIGN ON. SLOWED TO .75 MACH/275 KIAS. SUDDEN SEVERE TURB ENCOUNTERED FOR 30 SECONDS -- NO WARNING. MAX ALTDEV 150 FT AND VSI OF 1500 FPM. CAPT CALLED FLT ATTENDANTS AND INFORMED ONE OF THEM KNOCKED UNCONSCIOUS FOR 60 SECONDS AND 4 OTHERS THROWN TO FLOOR. NO PAX INJURED. ELECTED TO DIVERT TO SJU FOR MEDICAL CARE AND ACR INSPECTION. EMER DECLARED AND DISPATCH NOTIFIED. LANDED SMOOTHLY WITH NO FURTHER INCIDENTS.

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.