76 - Maintenance Procedures
B. Examine the EECU Fault Log
Read the fault code memory of the EECU.
Examine for “real time clock failure”
occurrences (DTC 1d06).
If this failure shows on one of the
ECUs (ECU A or ECU B) with the
error type “NPL: RTC-oscillator has
stopped, time/date 00:00:00 2000-
01-01 substituted”, replace the EECU
within the next 12 months.
Refer to the applicable Aircraft
Maintenance Manual.
If this failure shows on the two ECUs
(ECU A and ECU B) with minimum
one with error type “NPL: RTC-
oscillator has stopped, time/date
00:00:00 2000-01-01 substituted”,
replace the EECU immediately.