B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Total 9763
Communication Breakdown; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew Overcame Equipment Problem
Aircraft
After leveling off in cruise I attempted to make a PA as I turned the seatbelt sign off and noticed that the hand microphone on the center pedestal for the PA system did not work. I then used the microphone for the Captain's communication panel to make the announcement. Later in the flight I was informed by flight attendants that the takeoff announcement informing the flight attendants to be seated was not broadcast in the cabin. A Flight Attendant told me all four of the flight attendants as we were starting the takeoff roll and one was actually in the lavatory. Each of them then sat in their jump seats as we continued the takeoff.
B737 Captain reported the flight attendants did not recieve the takeoff announcement due to a microphone malfunctioning.