Message Name:

BRIDGEWIRE A OPEN
(Service Message)

Message Code:

B3-008152

Associated CAS:

None

Single left engine bottle 1 bridgewire A failed open, wire open, or FIREX Control Unit input monitoring circuit failed.

• Left Engine Discharge Cartridge (A111) of Fire Bottle No. 1
• Fire-Detection-and-Extinguishing Control Unit (FIREX CU) (A91)
• Junction Box 3 (JB3)
• Associated Wiring

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

WARNING: OBEY THE LOCAL REGULATIONS WHEN YOU USE EXPLOSIVE DEVICES OR PUT THEM IN STORAGE. DISCARD THE DISCHARGE CARTRIDGES SAFELY AND CORRECTLY. THE DISCHARGE CARTRIDGES CAN FIRE ACCIDENTALLY. THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.

WARNING: MAKE SURE THAT THE ELECTRICAL CIRCUITS ARE NOT ENERGIZED WHEN YOU CONNECT THE ELECTRICAL CONNECTOR TO THE DISCHARGE CARTRIDGE. IF THE ELECTRICAL CIRCUITS ARE ENERGIZED, THE DISCHARGE CARTRIDGE CAN FIRE ACCIDENTALLY. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO THE EQUIPMENT.

1. Pull and reset FIREX Control Unit (A91) circuit breakers CB6-A4 and CB5-A3. Is the fault message still present?

   1. If YES, continue with next step.
   2. If NO, do close out.

2. Do wiring check between Left Engine Discharge Cartridge (A111) of Bottle 1 to FIREX Control Unit (A91), through JB3, for the following wires:

   From	To	Results
   Conn A111P1 - 1	Conn A91P1 - 25
   Conn A111P1 - 2	Ground

   1. If check is not satisfactory, repair wiring or replace JB3.
   2. If check is satisfactory, continue with next step.

3. Swap Left Engine Discharge Cartridge (A111) of Fire Bottle no. 1 with Right Engine Discharge Cartridge (A112) of Fire Bottle no. 1. Is the message fault still present?

   1. If YES, continue with next step.
   2. If NO, replace defective Discharge Cartridge.

4. Replace FIREX Control Unit (A91).
5. Do close out.