A corp LR35 flight crew took a TA as a clearance to climb to a higher altitude just prior to a frequency change. The next controller confirmed the LR35 altitude and told them to descend back to FL330 due to an air carrier B737 in close proximity at FL350. LR35 flight crew was told to call the ARTCC via a telephone number which the rptrs claim was a disconnected number. First officer on the LR35 is a very low time pilot with low time last 90 days and in aircraft type.

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Attributes
ACN	356817
Time
Date	199612
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : chs
State Reference	SC
Altitude	msl bound lower : 33700 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	general aviation : corporate
Make Model Name	Learjet 35
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp
Experience	flight time last 90 days : 100 flight time total : 12150 flight time type : 8300
ASRS Report	356817
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 45 flight time total : 760 flight time type : 30
ASRS Report	357771
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 1100
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZJX controller (133.62) gave light transport X, LR35, a climb from FL330 to FL350. We responded climb to FL350 and initiated climb. ZJX controller then said next controller would give us higher and sent us over to 135.05. Our initial call was blocked. ZJX (135.05) said 2 aircraft called at same time. ZJX then asked light transport X, what is your assigned altitude. We said FL350. ZJX said, negative, assigned altitude is FL330, descend immediately to FL330 traffic at 10-11 O'clock position, 1 mi at FL350. We descended rapidly to FL330 and told controller traffic in sight. We were advised to contact ZJX via telephone number (xxxxxxx) which is a disconnected phone number. We never heard a retraction of our clearance to climb to FL350 or did we acknowledge stop climb at FL330. The controller on 133.62 was very busy. We were climbing less than a min when he handed us off. We should never have been issued a climb with another aircraft in so close proximity. As soon as we started our climb the controller had a deal.

Original NASA ASRS Text

Title: A CORP LR35 FLC TOOK A TA AS A CLRNC TO CLB TO A HIGHER ALT JUST PRIOR TO A FREQ CHANGE. THE NEXT CTLR CONFIRMED THE LR35 ALT AND TOLD THEM TO DSND BACK TO FL330 DUE TO AN ACR B737 IN CLOSE PROX AT FL350. LR35 FLC WAS TOLD TO CALL THE ARTCC VIA A TELEPHONE NUMBER WHICH THE RPTRS CLAIM WAS A DISCONNECTED NUMBER. FO ON THE LR35 IS A VERY LOW TIME PLT WITH LOW TIME LAST 90 DAYS AND IN ACFT TYPE.

Narrative: ZJX CTLR (133.62) GAVE LTT X, LR35, A CLB FROM FL330 TO FL350. WE RESPONDED CLB TO FL350 AND INITIATED CLB. ZJX CTLR THEN SAID NEXT CTLR WOULD GIVE US HIGHER AND SENT US OVER TO 135.05. OUR INITIAL CALL WAS BLOCKED. ZJX (135.05) SAID 2 ACFT CALLED AT SAME TIME. ZJX THEN ASKED LTT X, WHAT IS YOUR ASSIGNED ALT. WE SAID FL350. ZJX SAID, NEGATIVE, ASSIGNED ALT IS FL330, DSND IMMEDIATELY TO FL330 TFC AT 10-11 O'CLOCK POS, 1 MI AT FL350. WE DSNDED RAPIDLY TO FL330 AND TOLD CTLR TFC IN SIGHT. WE WERE ADVISED TO CONTACT ZJX VIA TELEPHONE NUMBER (XXXXXXX) WHICH IS A DISCONNECTED PHONE NUMBER. WE NEVER HEARD A RETRACTION OF OUR CLRNC TO CLB TO FL350 OR DID WE ACKNOWLEDGE STOP CLB AT FL330. THE CTLR ON 133.62 WAS VERY BUSY. WE WERE CLBING LESS THAN A MIN WHEN HE HANDED US OFF. WE SHOULD NEVER HAVE BEEN ISSUED A CLB WITH ANOTHER ACFT IN SO CLOSE PROX. AS SOON AS WE STARTED OUR CLB THE CTLR HAD A DEAL.

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.