The pilots of a challenger 300 experienced the apparent loss of the second VHF radio during a mainte...

Attributes
ACN	1062892
Time
Date	201301
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Challenger 300
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Component
Aircraft Component	Air/Ground Communication
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

During a ferry flight of aircraft due to #2 VHF radio failure; upon being vectored on a heading of 120 degrees to intercept the ILS at ZZZ we loss radio contact due to failure of #1 VHF radio. We maintained our assigned heading and altitude until ILS intercept and set the transponder to 7600. At 400 ft AGL we were able to contact the tower briefly and received a landing clearance. Upon exiting the runway we attempted to contact tower and ground without success. We observed light gun tower signals to cross the intersecting runway and to taxi to the ramp. The captain contacted the tower by phone to follow up. As we discovered upon and talking to the tower by phone after landing; they could hear us the entire time.

Original NASA ASRS Text

Title: The pilots of a Challenger 300 experienced the apparent loss of the second VHF radio during a maintenance ferry flight for one radio failure. After landing the flight crew was advised that the Tower was receiving their transmissions; but they could not hear the Tower.

Narrative: During a ferry flight of aircraft due to #2 VHF radio failure; upon being vectored on a heading of 120 degrees to intercept the ILS at ZZZ we loss radio contact due to failure of #1 VHF radio. We maintained our assigned heading and altitude until ILS intercept and set the transponder to 7600. At 400 FT AGL we were able to contact the Tower briefly and received a landing clearance. Upon exiting the runway we attempted to contact Tower and Ground without success. We observed light gun Tower signals to cross the intersecting runway and to taxi to the ramp. The Captain contacted the Tower by phone to follow up. As we discovered upon and talking to the Tower by phone after landing; they could hear us the entire time.

Data retrieved from NASA's ASRS site as of July 2013 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.

The pilots of a challenger 300 experienced the apparent loss of the second VHF radio during a maintenance ferry flight for one radio failure. After landing the flight crew was advised that the tower was receiving their transmissions; but they could not hear the tower.