ARTCC's response to a C421 pilot's request was, 'cleared as requested,' without repeating clearance, which left some confusion as to requested altitude.

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Attributes
ACN	556595
Time
Date	200208
Day	Thu
Local Time Of Day	1201 To 1800
Place
State Reference	AL
Altitude	msl bound lower : 14000 msl bound upper : 14700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Operator	general aviation : corporate
Make Model Name	Golden Eagle 421
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 60 flight time total : 2550 flight time type : 225
ASRS Report	556595
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

While level at 14000 ft and deviating around buildups, I requested from ZJX direct destination and 'one-six-zero.' ZJX responded 'cleared as requested.' I changed heading and commenced a climb to 16000 ft. At 14700 ft, ZJX inquired as to why I was climbing. I repeated what I thought I had been cleared for and was told to continue climb. I asked jax if there was a problem and they replied 'no sir.' in retrospect, I should have requested 'aircraft X requesting direct destination and 16000 ft.'

Original NASA ASRS Text

Title: ARTCC'S RESPONSE TO A C421 PLT'S REQUEST WAS, 'CLRED AS REQUESTED,' WITHOUT REPEATING CLRNC, WHICH LEFT SOME CONFUSION AS TO REQUESTED ALT.

Narrative: WHILE LEVEL AT 14000 FT AND DEVIATING AROUND BUILDUPS, I REQUESTED FROM ZJX DIRECT DEST AND 'ONE-SIX-ZERO.' ZJX RESPONDED 'CLRED AS REQUESTED.' I CHANGED HDG AND COMMENCED A CLB TO 16000 FT. AT 14700 FT, ZJX INQUIRED AS TO WHY I WAS CLBING. I REPEATED WHAT I THOUGHT I HAD BEEN CLRED FOR AND WAS TOLD TO CONTINUE CLB. I ASKED JAX IF THERE WAS A PROB AND THEY REPLIED 'NO SIR.' IN RETROSPECT, I SHOULD HAVE REQUESTED 'ACFT X REQUESTING DIRECT DEST AND 16000 FT.'

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.