SSENGER ADDRESS AMPLIFIER AND IN-FLIGHT ENTERTAINMENT AUDIO CIRCUT BREAKERS. RECOMMENDED SERVICE BULLETIN MOS 03-JUL-2002 - (s) SB 737-23-1172 HF FERRY FLIGHT KIT INSTALLATION/REMOVAL (SUPERSEDED BY SB 737-23-1172 R1). SERVICE BULLETIN MOS SB 737-23-1172 RI HIGH FREQUENCY (HF) COMMUNICATIONS SYSTEM - HF FERRY FLIGHT KIT INSTAL