Technical information

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750, ATA: 34-00
S/N Required to Replace IAC
Operators should be aware the aircraft serial number (S/N) must be inputted into the memory of an Integrated
Avionic Computer (IAC) (IC-800) for first-time installations. This is because the aircraft S/N is an integral part of the
data stored in the fault record of each IAC.
A six-digit format must be utilized when inputting the aircraft S/N on the Multi-Functional Display (MFD). Two
examples of the format entry to use are: aircraft S/N 750-0233 would input as “750233” and aircraft S/N 750-0066
would input as “750066.”
The procedure can be performed by using the following steps:
1. Access maintenance Page 2 of 2 on the MFD
2. Select LRU TEST
3. Select MAINT
4. Select PROGRM
5. Use the BARO knob to change the value of the display
6. Use the “<” button to move the cursor to the next character
7. Select SAVE when the aircraft S/N input in complete
8. Exit out of IMT
Note: Operators can also refer to the “Entering the Aircraft Serial Number” procedures found in the Honeywell
System Test and Fault Isolation Manual.
Team X has received reports of an increasing number of Rolls-Royce engine trend downloads with no aircraft S/N
being displayed due to improper input of data related to new installations of IAC components. The aircraft S/N in
the trend file (.tnd) is necessary for the engine manufacturer to correctly track on-aircraft applications of engine
trend information.
Questions, please contact:
Team X
316-517-5650 (Direct)
1-888-622-4789 (WATS)
[e-mail]