Overheat Conditions on EEC 2

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1. Possible Causes
· EEC ( 4000KS )
· Heat source in the Fan Zone
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 30-21-49-200-010 Detailed Visual Inspection of the Inlet Cowl Anti-Ice Supply Ducts and
Associated Hardware in the Core Compartment
Ref. AMM 30-21-49-790-010 Leak Test of the Inlet Cowl Anti-Ice Supply Ducts with the Engine in
Operation
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. AMM 73-22-49-220-040 Purge the Burner Pressure Sensor Tube
Ref. AMM 78-31-51-000-010 Removal of the Thrust Reverser Hydraulic Control Unit
REFERENCE DESIGNATION
Ref. AMM 78-31-51-200-010 General Check of the Hydraulic Control Unit (HCU) General Condition
and Filter Indicator, without component removal
Ref. AMM 78-31-51-400-010 Installation of the Thrust Reverser Hydraulic Control Unit
Ref. AMM 80-13-49-200-010 General Check of the Starter Duct
Ref. AMM 80-13-49-700-010 Leak Test of the Starter Ducts with the Engine in Operation
3. Fault Confirmation
Subtask 73-22-00-710-080-A
A. Not applicable, the EEC 2 was in overheat conditions and made a record of this fact.
4. Fault Isolation
Subtask 73-22-00-810-065-A
A. If the fault symptom is identified by the CFDS message EEC 2 and the ECAM warning ENG 2 FADEC
OVHT:
(1) check for signs of HCU overheat:
(a) examine the HCU for heat damage Ref. AMM 78-31-51-200-010 .
(b) make a record of any heat damage to the HCU.
(2) Make sure that there is no source of abnormal heat generation under the fan cowls:
(a) examine the under cowl area for evidence of fire.
(b) examine the starter duct for leaks Ref. AMM 80-13-49-200-010
(c) examine the thermal anti-ice duct for leaks in the fan zone only Ref. AMM 30-21-49-200-010 .
(d) do a leak test of the starter ducts Ref. AMM 80-13-49-700-010 .
(e) do a leak test of the thermal anti-ice ducts in the fan zone only Ref. AMM 30-21-49-790-010 .
(f) examine the PB line for leaks Ref. AMM 73-22-49-220-040 .
(g) rectify any leak or source of heat.
(3) The EEC ( 4000KS ) must be replaced Ref. AMM 73-22-34-000-010 and Ref.
AMM 73-22-34-400-010 .
(4) If signs of HCU overheat were noted in step (1).(a), or if any signs of leak or Heat source in the
Fan Zone was found, the HCU (4101KS) must be replaced Ref. AMM 78-31-51-000-010 and Ref.
AMM 78-31-51-400-010 . [Rev.6 from Feb 2017] 2026.04.04 04:36:16 UTC