- Aircraft configuration prior to reset:
On ground.
Circuit breakers to reset:No breakers
Steps to clear warning:Do a read-out of the TROUBLE SHOOTING DATA from the CFDS.
- replace the SD (b) counted counterclockwise from the SDCU Channel 2.
The TSD shows the total number of smoke detectors installed on the smoke detection loop, e.g. xxxx xxxx xxxx xxxx aa/bb (aa=bb shows all installed smoke detectors). The cabin layout specifies the number of smoke detectors.
If the TSD gives the complementary information xxxx xxxx xxxx xxxx A/b
(b < A)
- If the fault continues: replace the SD(b+1) counted counterclockwise from SDCU Channel 2 until the TSD gives the information xxxx xxxx xxxx xxxx A/B (A=B)
If the TSD gives the complementary information xxxx xxxx xxxx xxxx a/B
(a < B)
- replace the SD(a) counted clockwise from the SDCU Channel 1.
- If the fault continues: replace the SD(a+1) counted clockwise from SDCU Channel 1 until the TSD gives the information xxxx xxxx xxxx xxxx A/B (A=B).
A319 & A320 Configuration
A321 Configuration
Notes:If system will not test, than you can not apply MEL.
Applicable deferrals:MEL26-17-02=Smoke Detection Control Unit (SDCU).
320 Resets