Miscom between GA pilot and departure controller leads to incident report.

Attributes
ACN	423255
Time
Date	199812
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sln
State Reference	KS
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : commercial
Experience	flight time last 90 days : 55 flight time total : 3820 flight time type : 3000
ASRS Report	423255
Person 2
Affiliation	government : faa
Function	controller : departure
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other other
Consequence	Other
Supplementary
Air Traffic Incident	other

Narrative:

I received clearance from ZKC on the ground at sln. I was given a 10 min wheels-off time. During the taxi, I monitored both ZKC and the tower frequency (119.3). ATC amended my altitude from 6000 ft to 4000 ft during the taxi. I acknowledged the clearance. I taxied to runway 35 and departed within the 10 min period according to my clock. After takeoff and with the airplane takeoff checklist completed (heads up aural checklist), I contacted ZKC. The controller indicated that I was almost 2 mins late. I indicated that my wheels off was within 10 mins. She stated that she was holding a plane at the VOR. The TCASII indicated a plane 6 mi from my plane at the point where I was 1+ mi from the end of the runway, which means that the other plane was at least 7 mi from the end of runway 35. If the controller perceived a potential problem, she could have informed me prior to the 10 min wheels-off restr. At no time was there any threat of incident with another aircraft. The controller should have amended my clearance if she felt there was a potential problem as she had already done regarding the altitude amendment. With my TCASII system, I was able to maintain safe separation at all times.

Original NASA ASRS Text

Title: MISCOM BTWN GA PLT AND DEP CTLR LEADS TO INCIDENT RPT.

Narrative: I RECEIVED CLRNC FROM ZKC ON THE GND AT SLN. I WAS GIVEN A 10 MIN WHEELS-OFF TIME. DURING THE TAXI, I MONITORED BOTH ZKC AND THE TWR FREQ (119.3). ATC AMENDED MY ALT FROM 6000 FT TO 4000 FT DURING THE TAXI. I ACKNOWLEDGED THE CLRNC. I TAXIED TO RWY 35 AND DEPARTED WITHIN THE 10 MIN PERIOD ACCORDING TO MY CLOCK. AFTER TKOF AND WITH THE AIRPLANE TKOF CHKLIST COMPLETED (HEADS UP AURAL CHKLIST), I CONTACTED ZKC. THE CTLR INDICATED THAT I WAS ALMOST 2 MINS LATE. I INDICATED THAT MY WHEELS OFF WAS WITHIN 10 MINS. SHE STATED THAT SHE WAS HOLDING A PLANE AT THE VOR. THE TCASII INDICATED A PLANE 6 MI FROM MY PLANE AT THE POINT WHERE I WAS 1+ MI FROM THE END OF THE RWY, WHICH MEANS THAT THE OTHER PLANE WAS AT LEAST 7 MI FROM THE END OF RWY 35. IF THE CTLR PERCEIVED A POTENTIAL PROB, SHE COULD HAVE INFORMED ME PRIOR TO THE 10 MIN WHEELS-OFF RESTR. AT NO TIME WAS THERE ANY THREAT OF INCIDENT WITH ANOTHER ACFT. THE CTLR SHOULD HAVE AMENDED MY CLRNC IF SHE FELT THERE WAS A POTENTIAL PROB AS SHE HAD ALREADY DONE REGARDING THE ALT AMENDMENT. WITH MY TCASII SYS, I WAS ABLE TO MAINTAIN SAFE SEPARATION AT ALL TIMES.

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.