Message Name:

NO RA-RIU-7 BUS INPUT

Message Code:

B3-007261

Associated CAS:

None

RA-RIU-7 data absent at R-NAV (ADF or VIR) and not absent at R-DME. RIU is transmitting data to IOC.

• R NAV-4000 VOR/LOC/GS/MB/ADF Receiver 2 (VHF NAV) (A048)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Fault Confirmation Procedure:

1. ATA Chapter = 34-51
2. Message# = 5
3. {Term Definitions}

   1. NAV2-2 2X 057 10 EXCT XXXX-XXXX XXXX-XXXX XXXT-XXXX 057A: 13;NO RA-RIU-7 IN TO ADF
   2. NAV2-8 2X 057 10 EXCT XXXX-XXXX XXXX-XXXX XXXT-XXXX 057V: 13;NO RA-RIU-7 IN TO VIR
   3. DME2-4 2X 057 10 EXCT XXXX-XXXX XXXX-XXXX XXXT-XXXX 057: 13;NO RA-RIU-7 BUS INPUT
   4. RIU2-1 2X 350 10 ABSN XXXX-XXXX XXXX-XXXX XXXX-XXXX 350: (A) NO IOC 2X IN

1. Suspect failed R-NAV input or wiring. Input pins are 3 and 4.