B757 flight crew experiences intermittent communications anomalies enroute and elects to divert for ...

Narrative:

Holding short prior to departure had some difficulty communicating with tower. Checked microphone jacks and everything appeared normal. No problems again throughout climb and initial part of cruise. Approximately 200NM west of ZZZ received SELCAL stating hot mike and to contact ATC on another frequency. Reestablished communications with center. Then lost it again. Then com became intermittent while we tried to isolate the problem. When it became apparent that the communication was deteriorating; we decided to initiate diversion to ZZZ approximately 100 NM west of ZZZ. Received clearance for the arrival; and an initial descent clearance. Then communication was lost for the remainder of the flight. Declared emergency through dispatch using ACARS. Informed them that we would fly arrival then direct to the IAF for the ILS xxl. We received WX and performance for xxl and landed uneventfully overweight at approximately 203.0 landing weight. Taxied clear of runway. Followed emergency vehicle to gate.

Original NASA ASRS Text

Title: B757 Flight Crew experiences intermittent communications anomalies enroute and elects to divert for maintenance. During descent complete communication failure occurs. Crew continues the arrival and lands overweight safely.

Narrative: Holding short prior to departure had some difficulty communicating with tower. Checked MIC jacks and everything appeared normal. No problems again throughout climb and initial part of cruise. Approximately 200NM west of ZZZ received SELCAL stating hot mike and to contact ATC on another frequency. Reestablished communications with center. Then lost it again. Then com became intermittent while we tried to isolate the problem. When it became apparent that the communication was deteriorating; we decided to initiate diversion to ZZZ approximately 100 NM west of ZZZ. Received clearance for the arrival; and an initial descent clearance. Then communication was lost for the remainder of the flight. Declared emergency through dispatch using ACARS. Informed them that we would fly arrival then direct to the IAF for the ILS XXL. We received WX and performance for XXL and landed uneventfully overweight at approximately 203.0 landing weight. Taxied clear of runway. Followed emergency vehicle to gate.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	954420
Time
Date	201106
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	B757-200
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	VHF
Person 1
Function	Pilot Not Flying
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 10000 Flight Crew Type 5200
Events
Anomaly	ATC Issue All Types Aircraft Equipment Problem Critical

B757 flight crew experiences intermittent communications anomalies enroute and elects to divert for maintenance. During descent complete communication failure occurs. Crew continues the arrival and lands overweight safely.