Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors; Procedure
As part of the preflight procedure; the cockpit was disinfected with the large isopropyl alcohol based wipes/ Lysol type wipes for the common touch points during preflight and post flight. As part of this cleaning; the headsets are cleaned with the wipes and dwelling or the boom is wetted. This created a situation where when the pushback crew called for pushback; the boom mike on the headset did not work. The handset was used. After a period of time before takeoff; the boom was tested again; leading to the possibility that the alcohol solution may have entered inside the boom mike and not dried thoroughly as part of the dwelling process. The same hazard occurred on the previous leg to the FO; and normal operation was restored after a period of time.
Air carrier Captain reported alcohol from cleaning products may be entering the boom mike causing the equipment to malfunction.