Architecture voix + data B737 NG : RTP ↔ VHF/HF ↔ ASP ↔ antennes ↔ ACARS/CMU, interphones, call system, CVR.B737 NG voice + data architecture: RTP ↔ VHF/HF ↔ ASP ↔ antennas ↔ ACARS/CMU, interphones, call system, CVR.
ObjectifObjective
Relier chaque panneau (RTP, ASP, PTT, Service Interphone Switch, ACARS CDU) à sa fonction, ses bus et ses MEL/CB — sans confondre Normal et QRH.Tie each panel (RTP, ASP, PTT, Service Interphone Switch, ACARS CDU) to its function, buses and MEL/CB — without confusing Normal and QRH.
ARCHITECTURE — chaîne complèteARCHITECTURE — full chain
Chaîne : dual RTP → bus E&E → VHF 1/2/3 + HF 1/2 → antennes ; ASP sélectionne mic/RX ; ACARS/CMU via VHF-3 DATA ; CVR enregistre le pont.Chain: dual RTP → E&E bus → VHF 1/2/3 + HF 1/2 → antennas; ASP selects mic/RX; ACARS/CMU via VHF-3 DATA; CVR records the flight deck.
RADIO TUNING · RTP
Chaque RTP (Capt / F/O) accède à VHF 1/2/3 et HF 1/2 via le bus E&E. Un panneau en panne → l’autre retient toutes les radios.Each RTP (Capt / F/O) reaches VHF 1/2/3 and HF 1/2 via the E&E bus. One panel fail → the other still tunes all radios.
Contraste : ancien VHF Comm Panel câblé 1:1 à son transceiver → fail panel = radio perdue. RTP = redondance complète.Contrast: legacy VHF Comm Panel hard-wired 1:1 to its transceiver → panel fail = that radio lost. RTP = full redundancy.
Une antenne HF (notch rudder LE) → un seul HF peut TX à la fois ; les deux peuvent RX.One HF antenna (rudder LE notch) → only one HF can TX at a time; both can RX.
Trois ASP (Capt / F/O / OBS) : sélecteurs mic + volumes — SERV INT · FLT INT · PA · VHF/HF.Three ASPs (Capt / F/O / OBS): mic selects + volumes — SERV INT · FLT INT · PA · VHF/HF.
PTT volant : MIC (radio) vs INT (interphone). Speakers overhead mutent en INT/MIC — sauf mic masque O₂.Wheel PTT: MIC (radio) vs INT (interphone). Overhead speakers mute on INT/MIC — except O₂-mask mic.
CMU = routeur avionique FANS / CPDLC / ACARS — Honeywell Mark II/II+/III ou Rockwell Collins CMU 900.CMU = avionics router for FANS / CPDLC / ACARS — Honeywell Mark II/II+/III or Rockwell Collins CMU 900.
VHF-3 typiquement en DATA (ex. 136.775 MHz as installed). Perte 115V AC → Voice Mode ; Data + printer INOP.VHF-3 typically DATA (e.g. 136.775 MHz as installed). 115V AC loss → Voice Mode; Data + printer INOP.
ACARS out + Clock UTC INOP → suspect Hot Battery Bus. MEL 23-09 / printer 23-09-01.ACARS out + Clock UTC INOP → suspect Hot Battery Bus. MEL 23-09 / printer 23-09-01.