Intermittent loss of radio contact with aircraft due to icss equipment problems.

Attributes
ACN	233068
Time
Date	199302
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mke
State Reference	WI
Aircraft 1
Controlling Facilities	tracon : mke
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller non radar : 2 controller radar : 8
ASRS Report	233068
Person 2
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : unable
Consequence	Other
Supplementary
Primary Problem	Navigational Facility
Air Traffic Incident	other
Situations
ATC Facility	other physical facility
Navigational Aid	Unspecified

Narrative:

I did not receive a response from an aircraft to a control instruction. I noticed the frequency modulating, though. I went to stand-by and back to main, which restored communication. This is an ongoing problem and is potentially very dangerous if a timely acknowledgement of an instruction is necessary.

Original NASA ASRS Text

Title: INTERMITTENT LOSS OF RADIO CONTACT WITH ACFT DUE TO ICSS EQUIP PROBS.

Narrative: I DID NOT RECEIVE A RESPONSE FROM AN ACFT TO A CTL INSTRUCTION. I NOTICED THE FREQ MODULATING, THOUGH. I WENT TO STAND-BY AND BACK TO MAIN, WHICH RESTORED COM. THIS IS AN ONGOING PROB AND IS POTENTIALLY VERY DANGEROUS IF A TIMELY ACKNOWLEDGEMENT OF AN INSTRUCTION IS NECESSARY.

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.