A B737 flight crew was unable to acknowledge a clearance from slc tower.

Attributes
ACN	435745
Time
Date	199904
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : slc.airport
State Reference	UT
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : position and hold
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 150 flight time total : 12000 flight time type : 7000
ASRS Report	435745
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Events
Anomaly	other anomaly other
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance none taken : anomaly accepted

Narrative:

Slc tower instructions 119.05 'air carrier X position and hold runway 16L.' VHF #1 in use. First officer read back instructions. Tower at slc again restated 'air carrier X position and hold runway 16L.' first officer again read back instructions. We were in position and hold on runway 16L for an estimated 6-8 seconds. I radioed the tower due to the silence on the frequency. I heard no reply. I then heard a company jet say 'air carrier X do you hear tower?' I said 'no, tell them we are exiting the runway.' we exited runway 16L. We were told by company jet to contact tower on 118.3. We did. This 118.3 controller said the 119.05 frequency could not hear us. He said they had been having problems with their communications, ie, radios, transmitters. We returned to 119.05 tower frequency. No communication problems. Got clearance for takeoff and flew to oak with no problems. Upon arrival in oak, I called slc tower 118.3. Controller said that they had moved the 'locator' antennas on the field and were experiencing this communication blockage of runway 16L 3-4 times daily.

Original NASA ASRS Text

Title: A B737 FLC WAS UNABLE TO ACKNOWLEDGE A CLRNC FROM SLC TWR.

Narrative: SLC TWR INSTRUCTIONS 119.05 'ACR X POS AND HOLD RWY 16L.' VHF #1 IN USE. FO READ BACK INSTRUCTIONS. TWR AT SLC AGAIN RESTATED 'ACR X POS AND HOLD RWY 16L.' FO AGAIN READ BACK INSTRUCTIONS. WE WERE IN POS AND HOLD ON RWY 16L FOR AN ESTIMATED 6-8 SECONDS. I RADIOED THE TWR DUE TO THE SILENCE ON THE FREQ. I HEARD NO REPLY. I THEN HEARD A COMPANY JET SAY 'ACR X DO YOU HEAR TWR?' I SAID 'NO, TELL THEM WE ARE EXITING THE RWY.' WE EXITED RWY 16L. WE WERE TOLD BY COMPANY JET TO CONTACT TWR ON 118.3. WE DID. THIS 118.3 CTLR SAID THE 119.05 FREQ COULD NOT HEAR US. HE SAID THEY HAD BEEN HAVING PROBS WITH THEIR COMS, IE, RADIOS, XMITTERS. WE RETURNED TO 119.05 TWR FREQ. NO COM PROBS. GOT CLRNC FOR TKOF AND FLEW TO OAK WITH NO PROBS. UPON ARR IN OAK, I CALLED SLC TWR 118.3. CTLR SAID THAT THEY HAD MOVED THE 'LOCATOR' ANTENNAS ON THE FIELD AND WERE EXPERIENCING THIS COM BLOCKAGE OF RWY 16L 3-4 TIMES DAILY.

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.