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Circuit Breaker tripped

Yannick DUMOLLARDFlight Operations

A380 MMEL

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Aircraft dispatch

Impact on aircraft systems

ELEC C/B TRIPPED

Conclusion

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Dispatch with a Circuit Breaker tripped

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ELEC C/B TRIPPED

Conclusion

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Dispatch with a Circuit Breaker tripped

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ELEC C/B TRIPPED

What is a C/B?

C/B (Circuit Breaker) represents following devices

Conventional circuit breaker

Remote Control Circuit Breaker (RCCB)

RCCB-C (Conventional RCCB)

RCCB-P (Programmable RCCB)

Solid State Power Control (SSPC)

Devices are fitted in:

Emergency Electrical Power Distribution Centre 2500VU

(EEPDC)

Primary Electrical Power Distribution Centre (PEPDC)

Secondary Electrical Power Distribution Centre (SEPDC)

APU control box (5000VE)

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Any tripped C/B is displayed in the cockpit by:

The ELEC C/B TRIPPED alert with

Its designation and FIN on the C/B SD page

Dispatch with a Circuit Breaker trippedPage 5

ELEC C/B TRIPPED

FIN: Functional Item Number

ELEC C/B TRIPPED

C/B

FUNCTIONAL DESIGNATION LOCATION FIN

FWD CAX FAN | PDMI | 1HU

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ELEC C/B TRIPPED

Any tripped C/B is monitored for Maintenance crew by:

Maintenance message associated with affected

system

Protection Distribution Maintenance Interface (PDMI)

that provides C/B status (open, open-tripped,)

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Conclusion

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Impact on aircraft systems

ELEC C/B TRIPPED

Case 1 - Associated with a cockpit effect

Another ECAM alert on affected systems

Amber indication (on SD, Overhead panel,)

Maintenance message (CMS Cockpit Items)

Case 2 - Associated with maintenance message only

CMS Pending Items

CMS Minor Items

Case 3 - Neither any cockpit nor maintenance message

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ELEC C/B TRIPPED

Conclusion

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Aircraft dispatch

MMEL Entry ELEC C/B TRIPPED

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Aircraft dispatch

Extract MMEL Items/Preamble/ECAM & CMS paragraph

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Aircraft dispatch

MMEL Entry ELEC C/B TRIPPED

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Aircraft dispatch

SIL 24-084 Information for dispatch with ELEC C/B TRIPPED

SIL provides table Tripped C/B & Possible effect

List of all C/Bs

Information on their affected systems

Aircraft dispatch conditions

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Aircraft dispatch

ELEC C/B TRIPPED

C/B

FUNCTIONAL DESIGNATION LOCATION FIN

TAIL CONE VENT FAN | PDMI | 800HR

ECAM alert

C/B SD page

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Aircraft dispatch

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Aircraft dispatch

ELEC C/B TRIPPED

C/B

FUNCTIONAL DESIGNATION LOCATION FIN

TAIL CONE VENT FAN | PDMI | 800HR

ECAM alert

C/B SD page

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Aircraft dispatch

ELEC C/B TRIPPED

C/B

FUNCTIONAL DESIGNATION LOCATION FIN

FWD CAX FAN | PDMI | 1HU

ECAM alert

C/B SD page

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Aircraft dispatch

ELEC C/B TRIPPED

C/B

FUNCTIONAL DESIGNATION LOCATION FIN

MFD F/O NORM | PDMI | 801WK

ECAM alert

C/B SD page

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ELEC C/B TRIPPED

Conclusion

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Dispatch with a Circuit Breaker tripped

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Conclusion

MEL remains the reference to dispatch the aircraft

SIL 24-084 issued May 2010

Provides clear guidance for aircraft condition

assessment

Optimizes aircraft dispatch decision-making

ELEC C/B TRIPPED

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