Loss of radio contact when center controller unable to establish radio contact with atx driver.

Attributes
ACN	269040
Time
Date	199404
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zid airport : cmh
State Reference	IN
Altitude	msl bound lower : 5000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air taxi
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	cruise other descent other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 100 flight time total : 1500 flight time type : 145
ASRS Report	269040
Person 2
Affiliation	Other
Function	observation : passenger observation : observer
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 1250 flight time type : 15
Events
Anomaly	aircraft equipment problem : critical non adherence : far non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : overcame equipment problem
Consequence	faa : investigated
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	other
Situations
ATC Facility	other physical facility

Narrative:

On 4/xx/94, on a 135 air taxi flight from beh to cmg, the following transpired. At approximately 35 NM northwest of cmh, at 55Z or am, 55 eastern, small transport which I was PIC was cleared on descent to cmh from 9000 ft to 5000 ft. Upon completion of descent it was noticed that there had been no radio contact in approximately 5 mins. I made several attempts to contact ZID. After 3 tries contact was reestablished. At that time controller said he was unable to raise us for a period and issued a frequency change to columbus approach. Upon landing at cmh, ground advised us to contact columbus radar supervisor who had us call ZID. Conversation with mr. X of ZID said they had a loss of separation between our aircraft and another. Apparent communications loss or problems may have caused this occurrence. A pilot and also a passenger was a witness with a headset on in the front right seat. He agrees totally with this report and has also filed a NASA safety report.

Original NASA ASRS Text

Title: LOSS OF RADIO CONTACT WHEN CTR CTLR UNABLE TO ESTABLISH RADIO CONTACT WITH ATX DRIVER.

Narrative: ON 4/XX/94, ON A 135 AIR TAXI FLT FROM BEH TO CMG, THE FOLLOWING TRANSPIRED. AT APPROX 35 NM NW OF CMH, AT 55Z OR AM, 55 EASTERN, SMT WHICH I WAS PIC WAS CLRED ON DSCNT TO CMH FROM 9000 FT TO 5000 FT. UPON COMPLETION OF DSCNT IT WAS NOTICED THAT THERE HAD BEEN NO RADIO CONTACT IN APPROX 5 MINS. I MADE SEVERAL ATTEMPTS TO CONTACT ZID. AFTER 3 TRIES CONTACT WAS REESTABLISHED. AT THAT TIME CTLR SAID HE WAS UNABLE TO RAISE US FOR A PERIOD AND ISSUED A FREQ CHANGE TO COLUMBUS APCH. UPON LNDG AT CMH, GND ADVISED US TO CONTACT COLUMBUS RADAR SUPVR WHO HAD US CALL ZID. CONVERSATION WITH MR. X OF ZID SAID THEY HAD A LOSS OF SEPARATION BTWN OUR ACFT AND ANOTHER. APPARENT COMS LOSS OR PROBS MAY HAVE CAUSED THIS OCCURRENCE. A PLT AND ALSO A PAX WAS A WITNESS WITH A HEADSET ON IN THE FRONT R SEAT. HE AGREES TOTALLY WITH THIS RPT AND HAS ALSO FILED A NASA SAFETY RPT.

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.