ACARS NO COMM • Communications

SYS

ConditionCondition

ACARS ne peut établir la communication sol (NO COMM) — causes, CDU LINK STATUS, DSP, CB reset.ACARS cannot establish ground communication (NO COMM) — causes, CDU LINK STATUS, DSP, CB reset.

ObjectifObjective

Vérifier VHF-3 DATA / freq, MEDIA/DSP région, chemins MCDU, puis CB P18-2E si reset soft échoue.Verify VHF-3 DATA / freq, regional MEDIA/DSP, MCDU paths, then CB P18-2E if soft reset fails.

◈ LIVE VHF-3 DATA

In FLT

COMMON CAUSES

Hors portée d’une station solOut of range of a ground station
VHF-3 pas en DATA ou mauvaise fréquence data (ex. 136.775 MHz as installed)VHF-3 not set to DATA or wrong data frequency (e.g. 136.775 MHz as installed)
Mauvais canal / DSP sélectionnéWrong communication channel / DSP selected

CDU · ACARS-LINK STATUS

LINK STATUS : VHF/SAT, MEDIA, FREQ, DSP. Yellow NO COMM = pas de data link. MANUAL VHF TUNE (photo ~4R ; QA note vs 6R).LINK STATUS: VHF/SAT, MEDIA, FREQ, DSP. Yellow NO COMM = no data link. MANUAL VHF TUNE (photo ~4R; QA note vs 6R).

MCDU PATHS (software varies)

Depuis (M)CDU MENU — chemins typiques :From (M)CDU MENU — typical paths:

ACARS > APPLICATION MENU > TECHNICAL > LINK STATUS > VHF DATA CTL >
ACARS > DLNK > TECHNICAL > LINK STATUS > MEDIA
ACARS > SYSTEM > MISC > DATA FREQUENCY >
DLK > ACARS > MISC > DATA FREQUENCY >

DSP · TEST · CB

Vérifier ARINC / DSP région : SITA · EUR · AMER · AFR · ME.Verify regional ARINC / DSP: SITA · EUR · AMER · AFR · ME.
Softkeys : SELECT DSP > · MANUAL VHF TUNE > · TEST >Softkeys: SELECT DSP > · MANUAL VHF TUNE > · TEST >
TEST réussi → message retour ou chime SELCAL.Successful TEST → return message or SELCAL chime.
Si reset logiciel échoue → cycle CB P18-2E.If software reset fails → cycle CB P18-2E.

Check	Target
VHF-3 mode	DATA
Data freq (ex.)	136.775 MHz as installed
MEDIA / DSP	Region correct (SITA…)
CB last resort	P18-2E

CHECKLIST RAPIDEQUICK CHECKLIST

RTP : VHF-3 = DATA ? Fréquence data correcte ?RTP: VHF-3 = DATA? Correct data frequency?
CDU LINK STATUS : MEDIA / FREQ / DSP région ?CDU LINK STATUS: MEDIA / FREQ / DSP region?
SELECT DSP · MANUAL VHF TUNE · TEST (SELCAL?)SELECT DSP · MANUAL VHF TUNE · TEST (SELCAL?)
Hors portée station ? Attendre / autre MEDIA (SAT as installed)Out of station range? Wait / other MEDIA (SAT as installed)
Dernier recours : CB P18-2ELast resort: CB P18-2E

Freeze RTP lié VHF-3/ACARS → aussi P18-2D + P6-1E (voir RTP Architecture) — distinct de P18-2E NO COMM.RTP freeze tied to VHF-3/ACARS → also P18-2D + P6-1E (see RTP Architecture) — distinct from P18-2E NO COMM.

Exemple FREQ photo LINK STATUS : 131.725 · DSP SITA · MEDIA ↓VHF — valeurs d’exemple, pas universelles.Photo LINK STATUS example: FREQ 131.725 · DSP SITA · MEDIA ↓VHF — example values, not universal.
Headers CDU : TEST / ACARS / ATN. Softkey RETURN typiquement 6L.CDU headers: TEST / ACARS / ATN. RETURN softkey typically 6L.

SIMULATOR LIVE : CDU LINK STATUS + MANUAL VHF TUNE + SELCAL chime sur TEST.SIMULATOR LIVE: CDU LINK STATUS + MANUAL VHF TUNE + SELCAL chime on TEST.

VHF-3 DATAVHF-3 DATA

Sur RTP, VHF-3 doit afficher DATA en mode ACARS data — voir légendes RTP FAIL/INOP.On RTP, VHF-3 should show DATA in ACARS data mode — see legends on RTP FAIL/INOP.
Fréquence data exemple as installed : 136.775 MHz — confirmer config compagnie.Example data frequency as installed: 136.775 MHz — confirm company config.
Freeze RTP VHF-3/ACARS : CBs P18-2D + P6-1E (≠ P18-2E).RTP freeze VHF-3/ACARS: CBs P18-2D + P6-1E (≠ P18-2E).

Cross-link MU/DU · RTP VHF-3. LIVE CDU LINK STATUS pour SIMULATOR.Cross-link MU/DU · RTP VHF-3. LIVE CDU LINK STATUS for SIMULATOR.

ACARS NO COMM / LINK STATUS