F100 reports severe turbulence 24000 ft over gnv.

Attributes
ACN	436812
Time
Date	199905
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : gnv.airport
State Reference	FL
Altitude	msl bound lower : 24000 msl bound upper : 27000
Environment
Weather Elements	Turbulence Thunderstorm
Aircraft 1
Controlling Facilities	artcc : zjx.artcc tower : dfw.tower
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	436812
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : excursion from assigned altitude inflight encounter : turbulence inflight encounter other non adherence : far other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to original clearance
Supplementary
Problem Areas	Environmental Factor
Primary Problem	Environmental Factor

Narrative:

ATC facility: jax. Location: 70 mi south of taylor, vicinity of gainesville, fl. Did not paint any cells or turbulence in our vicinity although the WX radar did paint a cell 40 mi southwest of our position. We were at FL270 experiencing continuous light chop in cloud. Suddenly we experienced a couple of severe jolts which disengaged the autoplt and an altitude loss of 300 ft was experienced. Then we experienced heavy precipitation for a few seconds and the chop then became just moderate. The seat belt sign was already on and the #1 flight attendant had just made a walk-through of the main cabin prior to the severe jolts. After the severe chop which lasted only a couple of seconds the #1 flight attendant came and reported that all passenger and cabin crew were ok and no one was injured. The first officer bumped his head on the movable sunshade but was not cut or visibly injured. The remainder of the flight into tpa went without incident. No passenger made any comments or complaints upon deplaning the aircraft in tpa.

Original NASA ASRS Text

Title: F100 RPTS SEVERE TURB 24000 FT OVER GNV.

Narrative: ATC FACILITY: JAX. LOCATION: 70 MI S OF TAYLOR, VICINITY OF GAINESVILLE, FL. DID NOT PAINT ANY CELLS OR TURB IN OUR VICINITY ALTHOUGH THE WX RADAR DID PAINT A CELL 40 MI SW OF OUR POS. WE WERE AT FL270 EXPERIENCING CONTINUOUS LIGHT CHOP IN CLOUD. SUDDENLY WE EXPERIENCED A COUPLE OF SEVERE JOLTS WHICH DISENGAGED THE AUTOPLT AND AN ALT LOSS OF 300 FT WAS EXPERIENCED. THEN WE EXPERIENCED HVY PRECIPITATION FOR A FEW SECONDS AND THE CHOP THEN BECAME JUST MODERATE. THE SEAT BELT SIGN WAS ALREADY ON AND THE #1 FLT ATTENDANT HAD JUST MADE A WALK-THROUGH OF THE MAIN CABIN PRIOR TO THE SEVERE JOLTS. AFTER THE SEVERE CHOP WHICH LASTED ONLY A COUPLE OF SECONDS THE #1 FLT ATTENDANT CAME AND RPTED THAT ALL PAX AND CABIN CREW WERE OK AND NO ONE WAS INJURED. THE FO BUMPED HIS HEAD ON THE MOVABLE SUNSHADE BUT WAS NOT CUT OR VISIBLY INJURED. THE REMAINDER OF THE FLT INTO TPA WENT WITHOUT INCIDENT. NO PAX MADE ANY COMMENTS OR COMPLAINTS UPON DEPLANING THE ACFT IN TPA.

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.