Integrated, Cabin & Information Systems
Integrated modular avionics (IMA), cabin systems and information systems, with configuration control.
Integrated, cabin & information systems, summary notes
- INTEGRATED MODULAR AVIONICS (IMA, ATA 42): instead of many dedicated 'black boxes' (federated LRUs), IMA runs multiple software functions on shared, standardised computing modules in common cabinets, with robust PARTITIONING so one function cannot corrupt another.
- IMA cuts weight, wiring and spares and eases upgrades, but shifts the emphasis to software configuration control, data loading and partition integrity.
- CABIN SYSTEMS (ATA 44): the cabin management/intercommunication system, passenger address, in-flight entertainment (IFE) and passenger-service functions.
- INFORMATION SYSTEMS (ATA 46): flight-deck and cabin information, electronic flight bags (EFB), network servers and data links, kept SEGREGATED from the certified flight-critical systems by design.
- For the B2 technician, software/part-number configuration control and data-loading procedures are as important as the hardware.
- ⚠ Exam trap: IMA replaces many dedicated LRUs with shared, PARTITIONED computing modules in common cabinets (not one box per function); information systems (EFB etc.) are kept SEGREGATED from flight-critical systems.
What is the main safety principle that lets many different functions share the same IMA computing module?
Robust partitioning. IMA uses strict time and space (memory) partitioning so each hosted application gets guaranteed processor time and protected memory, and cannot access or corrupt another application's data or starve it of resources. This isolation means a fault or overrun in one function stays contained and cannot propagate to the others sharing the module, which is what makes hosting mixed-criticality functions on shared hardware acceptable.
Integrated & cabin systems concept map
Integrated, Cabin & Information Systems
Integrated, cabin & information systems quiz
Integrated, Cabin & Information Systems, quiz
1. Integrated Modular Avionics (IMA) uses:
Shared, partitioned computing modules in common cabinetsOne dedicated box per functionNo computers2. Partitioning in IMA ensures that:
One function cannot corrupt anotherAll functions share memory freelySoftware cannot update3. A federated architecture has:
A dedicated LRU per functionShared modules for allNo wiring4. IMA reduces:
Weight, wiring and sparesThe need for configuration controlRedundancy entirely5. Cabin Systems (ATA 44) include:
Passenger address, IFE and cabin managementFlight controlsFuel6. An Electronic Flight Bag (EFB) belongs to:
Information systems (ATA 46)HydraulicsFire protection7. Information systems are kept:
Segregated from flight-critical systemsMerged with flight controlsUnpowered8. A key discipline for IMA/EFB is:
Software configuration control and data loadingTyre pressureOil grade