Loss of the EEC 1 Buses by the DMC 3

TASK 31-63-81-810-924-A
Loss of the EEC 1 Buses by the DMC 3

1. Possible Causes

DMC-3 [1WT3]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-63-00-810-890-A	Loss of the EEC 1 Channel A Output Bus by the DMC 3
TSM TASK 31-63-00-810-891-A	Loss of the EEC 1 Channel B Output Bus by the DMC 3
AMM 31-60-00-740-007	GROUND SCANNING Test of the DMC
AMM 31-63-34-000-001	Removal of the DMC
AMM 31-63-34-400-001	Installation of the DMC

3. Fault Confirmation
Subtask 31-63-81-740-292-A ** ON A/C NOT FOR ALL

A. Test
Do the Ground Scanning Test of the DMC AMM 31-60-00-740-007.

4. Fault Isolation
Subtask 31-63-81-810-202-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message EEC(E1-4000KS):

Do the fault isolation (Para.4.A.) of the procedures (Ref. TSM TASK 31-63-00-810-890) and (Ref. TSM TASK 31-63-00-810-891).

(1) If the fault continues:

Replace the DMC-3 [1WT3] AMM 31-63-34-000-001 and AMM 31-63-34-400-001.

Subtask 31-63-81-810-203-A ** ON A/C NOT FOR ALL

B. If the test does not give the maintenance message EEC(E1-4000KS):
(1) The fault can be intermittent or an internal failure of the EEC could have ocurred:
(a) Examine the PFR/CFDS (ENG) for a related EEC problem or message.
(b) Do the applicable trouble shooting procedure related to the failure message.

Subtask 31-63-81-740-293-A ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:31:05 UTC