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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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Quick Links

04/26/21

Message Overview:

Message Name:

LRU OPERATIONS - TEST MENU - IASC1 TST B / IASC2 TST B

Identifier: 216OBS004
Effectivity: AIRCRAFT 20501 - 20999
System: Air Conditioning
Associated CAS: None
System Description: 21-61-00
Schematic Diagram: 21-61-00
Wiring Diagram: 21-61-01

Message Description:

When users enter the LRU OPERATIONS test menu, ATA 21-61 TEMPERATURE CONTROL, IASC1 TST B or IASC2 TST B, TEST is magenta and word 000B is dashed out.

Possible Causes:

  • None

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Operational Test of the Integrated Air System (IAS) Controller AMM 21-31-01-710-801
Operational Test of the Air Conditioning System AMM 21-52-00-710-801

Troubleshooting Recommendations:

  1. This is normal operation. The IASC Channel B is a non-reporting LRU.
  2. If you select SKIP and tab down to word 000B, the system goes to LEFT BRAKE PRESSURE applied DATA READER, as it is the next command in the MDC Test Files.

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