An air carrier medium large transport lost communication with ZJX.

Attributes
ACN	226103
Time
Date	199211
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : flo
State Reference	SC
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 120 flight time total : 5800 flight time type : 1400
ASRS Report	226103
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 400
ASRS Report	226397
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : overcame equipment problem other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

This model aircraft is one of the oldest in our air carrier fleet. It is extremely noisy, has a poor audio system, and a typically unbalanced audio amplifier. Typically, the captain's side is very loud and the copilot is low at full volume. In cruise flight, captain flying, first officer on radios. The captain and first officer were engaged in conversation and (apparently) missed a frequency change. After a period of non-communication, the captain turned up the squelch and continued to monitor. After a few mins we heard an air carrier aircraft on frequency, but did not hear ATC respond. The captain asked air carrier aircraft to relay to center our need for another frequency. We were assigned 124.07. We made contact on that frequency and were immediately assigned another frequency. ZJX advised that there was 'no problem' with the miscom. Supplemental information from acn 226397: we were informed we had been 'no radio' for about 200 mi.

Original NASA ASRS Text

Title: AN ACR MLG LOST COM WITH ZJX.

Narrative: THIS MODEL ACFT IS ONE OF THE OLDEST IN OUR ACR FLEET. IT IS EXTREMELY NOISY, HAS A POOR AUDIO SYS, AND A TYPICALLY UNBALANCED AUDIO AMPLIFIER. TYPICALLY, THE CAPT'S SIDE IS VERY LOUD AND THE COPLT IS LOW AT FULL VOLUME. IN CRUISE FLT, CAPT FLYING, FO ON RADIOS. THE CAPT AND FO WERE ENGAGED IN CONVERSATION AND (APPARENTLY) MISSED A FREQ CHANGE. AFTER A PERIOD OF NON-COM, THE CAPT TURNED UP THE SQUELCH AND CONTINUED TO MONITOR. AFTER A FEW MINS WE HEARD AN ACR ACFT ON FREQ, BUT DID NOT HEAR ATC RESPOND. THE CAPT ASKED ACR ACFT TO RELAY TO CTR OUR NEED FOR ANOTHER FREQ. WE WERE ASSIGNED 124.07. WE MADE CONTACT ON THAT FREQ AND WERE IMMEDIATELY ASSIGNED ANOTHER FREQ. ZJX ADVISED THAT THERE WAS 'NO PROBLEM' WITH THE MISCOM. SUPPLEMENTAL INFO FROM ACN 226397: WE WERE INFORMED WE HAD BEEN 'NO RADIO' FOR ABOUT 200 MI.

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.