Climb overshoot in thunderstorm causes less than standard separation.

Attributes
ACN	283593
Time
Date	199409
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : jax
State Reference	FL
Altitude	msl bound lower : 9000 msl bound upper : 9500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other cruise other
Route In Use	enroute : on vectors enroute airway : jax
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	cruise other cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : commercial pilot : cfi pilot : atp pilot : instrument
Experience	flight time last 90 days : 170 flight time total : 15000 flight time type : 170
ASRS Report	282841
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 170 flight time total : 2000 flight time type : 170
ASRS Report	283593
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : overshoot conflict : airborne less severe inflight encounter : weather non adherence : clearance non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 30000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation
Situations
ATC Facility	procedure or policy : unspecified

Narrative:

Climbing out of jax on 360 degree heading climbing to 9000 ft assigned. Captain asked 30 degree left turn to avoid a thunderstorm. Jax departure control denied request. Approximately 2 mins later we entered the building thunderstorm at approximately the same time the captain began his lever off at 9000 ft MSL. We encountered heavy rain and an updraft that caused our altitude to increase to 9500 ft MSL. We exited the thunderstorm after 20-30 seconds time. The jax controller issued evasive maneuvers for us and conflicting traffic. I had the traffic in sight. This all could have been avoided had we been given our avoidance vector as requested. Supplemental information from acn 282841: request a 330 degree heading to avoid going into the only thunderstorm in the area.the aircraft started ascending at approximately 2000 FPM. The aircraft started to descend at approximately 9500 ft but not before the controller told us to hold 9000 ft because we had traffic at 10000 ft. The controller turned our traffic left, we were separated by about 500 ft vertical and 5 mi horizontal. The controller made a routine situation dangerous. I should have been more insistent on not going into the WX. No one on board was hurt.

Original NASA ASRS Text

Title: CLB OVERSHOOT IN TSTM CAUSES LTSS.

Narrative: CLBING OUT OF JAX ON 360 DEG HDG CLBING TO 9000 FT ASSIGNED. CAPT ASKED 30 DEG L TURN TO AVOID A TSTM. JAX DEP CTL DENIED REQUEST. APPROX 2 MINS LATER WE ENTERED THE BUILDING TSTM AT APPROX THE SAME TIME THE CAPT BEGAN HIS LEVER OFF AT 9000 FT MSL. WE ENCOUNTERED HVY RAIN AND AN UPDRAFT THAT CAUSED OUR ALT TO INCREASE TO 9500 FT MSL. WE EXITED THE TSTM AFTER 20-30 SECONDS TIME. THE JAX CTLR ISSUED EVASIVE MANEUVERS FOR US AND CONFLICTING TFC. I HAD THE TFC IN SIGHT. THIS ALL COULD HAVE BEEN AVOIDED HAD WE BEEN GIVEN OUR AVOIDANCE VECTOR AS REQUESTED. SUPPLEMENTAL INFO FROM ACN 282841: REQUEST A 330 DEG HDG TO AVOID GOING INTO THE ONLY TSTM IN THE AREA.THE ACFT STARTED ASCENDING AT APPROX 2000 FPM. THE ACFT STARTED TO DSND AT APPROX 9500 FT BUT NOT BEFORE THE CTLR TOLD US TO HOLD 9000 FT BECAUSE WE HAD TFC AT 10000 FT. THE CTLR TURNED OUR TFC L, WE WERE SEPARATED BY ABOUT 500 FT VERT AND 5 MI HORIZ. THE CTLR MADE A ROUTINE SIT DANGEROUS. I SHOULD HAVE BEEN MORE INSISTENT ON NOT GOING INTO THE WX. NO ONE ON BOARD WAS HURT.

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.