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3. MAINTENANCE, TROUBLESHOOTING
3-4
Note 2: A Cabin Panel that is currently forwarding an alarm cannot be tested. Howev-
er, you can test the Cabin Panels that are not forwarding an alarm. (For example, in
the 2nd stage, a Cabin Panel other than the one in the back-up officer’s quarters can
be tested.)
3.5 Life Expectancy of Major Parts
The life of the fan depends on the operating environment. It is recommended to re-
place the fan before its expected expiration.
Unit Part Type Code No. Approx. Life
Processor Unit Fan MMF-06G12ES-ROD 000-174-638-10 5 years