Altitude deviation. Approaching their cleared altitude, the flight crew experienced moderate turbulence. Reporter first officer was briefing the flight attendants when a call came from center telling them they were 600 ft high. Captain replied that they couldn't maintain FL290 due to turbulence.

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Attributes
ACN	335120
Time
Date	199605
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : jhw
State Reference	NY
Altitude	msl bound lower : 29000 msl bound upper : 29600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute airway : zob
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : commercial pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 4000 flight time type : 2000
ASRS Report	335120
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot inflight encounter : weather non adherence : clearance
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Climbing to assigned cruise altitude FL290 experienced moderate turbulence passing 28000 ft. I was briefing flight attendants regarding turbulence. Next thing ATC ZOB called stating 'show 600 ft high.' captain confirmed stating unable to maintain FL290 due turbulence.

Original NASA ASRS Text

Title: ALTDEV. APCHING THEIR CLRED ALT, THE FLC EXPERIENCED MODERATE TURB. RPTR FO WAS BRIEFING THE FLT ATTENDANTS WHEN A CALL CAME FROM CTR TELLING THEM THEY WERE 600 FT HIGH. CAPT REPLIED THAT THEY COULDN'T MAINTAIN FL290 DUE TO TURB.

Narrative: CLBING TO ASSIGNED CRUISE ALT FL290 EXPERIENCED MODERATE TURB PASSING 28000 FT. I WAS BRIEFING FLT ATTENDANTS REGARDING TURB. NEXT THING ATC ZOB CALLED STATING 'SHOW 600 FT HIGH.' CAPT CONFIRMED STATING UNABLE TO MAINTAIN FL290 DUE TURB.

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.