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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

02/25/21

Message Overview:

Message Name:

STBY INST BATT IN TEST
(Service Message)

Message Code:

B3-271553

Associated CAS:

None

Reporting LRU: STBY INST BATT
System Description: 24-32-00
Schematic Diagram: 24-32-00
Wiring Diagram: 24-32-05

Message Description:

Standby Instrument Battery test in progress. Test sequence will be approximately 20 seconds.

This service message will never be logged in the MDC and could only be seen in the current service messages page during the Standby Instrument Battery test under normal operation.

Possible Causes:

None

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter:Customer FORUM and Newsletter Volume 08 / Issue 09 - Tuesday, May 3, 2011

Capacity Test

The ISI Battery system will incorporate an internal test load across the batteries when a level test is requested, while simultaneously removing battery voltage from the output voltage, it is connected to the test load. This test will be launched from the maintenance panel using the test switch or the from the front of the ISI BATT.

Once the test is initiated, an ISI BATT TEST ACTIVE signal is set to ground (TRUE) and sent to the RDC and the battery. The 'STBY INST BATT IN TEST' message is displayed by the MDC.

If the ISI Battery stays in TEST for more than 30 seconds or if the Test failed, the message (B3-271557) 'STBY INST BATT FAIL' will be displayed by the MDC and the advisory message 'STBY INST BATT FAULT' will be shown on EICAS.

If the TEST passes, the message (B3-271555) 'STBY INST BATT OK' will be displayed by the MDC for 15 seconds.

SIB - Functions Summary

Quick Links:

Operational Test of the Integrated Standby-Instrument (ISI) Battery Capacity AMM 24-32-05-710-801

Troubleshooting Recommendations:

  1. None

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