Removal of the Electronic Engine Control (EEC) [IAE]

TASK 73-22-34-000-010-A
Removal of the Electronic Engine Control (EEC)

FIN: 4000KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	AR	CAP - BLANKING, PLASTIC
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
IAE1R19416	1	WRENCH-SPECIAL 4 AND 8 SLOT CONNECTOR, LIFTING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 31-32-00-860-012-A	Procedure to Get Access to the SYSTEM REPORT/TEST/ENG Page
TASK 31-36-00-740-015-A	Printout of the Engine/APU Hours and Cycles Stored in the Flight Data Interface and Management Unit (FDIMU)
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Electronic Engine Control

3. Job Set-up
Subtask 73-22-34-740-050-B ** ON A/C NOT FOR ALL

A. Do a print-out of the engine hours and cycles and keep the print with the engine for follow-up (Ref. AMM TASK 31-36-00-740-006) or (Ref. AMM TASK 31-36-00-740-015).

NOTE: Some tasks will possibly not be applicable depending on whether a Data Management Unit (DMU) or a Flight Data Interface and Management Unit (FDIMU) is installed on the aircraft.

Subtask 73-22-34-740-052-A ** ON A/C NOT FOR ALL

B. Print the Trouble Shooting Data
(1) On the 1(2) MCDU, get the SYSTEM REPORT/TEST ENG page (Ref. AMM TASK 31-32-00-860-012)
(2) Push the line key adjacent to the FADEC indication.
(3) Push the line key adjacent to the TROUBLESHOOTING indication.
(4) Print the FLIGHT DATA and GROUND DATA.

Subtask 73-22-34-865-060-A ** ON A/C NOT FOR ALL

WARNING: BEFORE YOU OPEN PHC CIRCUIT BREAKERS 2DA1(2,3), OPEN PROBE HEATER CIRCUIT-BREAKERS 1DA1(2), 3DA1(2,3), 4DA1(2,3) AND 5DA1(2,3). IF YOU DO NOT OBEY THIS SEQUENCE: - THE PROBES WILL BECOME TOO HOT. - THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.

WARNING: OPEN THE ANTI-ICE/PROBES CIRCUIT BREAKERS 1DA1 (2), 3DA1 (2,3), 4DA1 (2,3) AND 5DA1 (2,3) BEFORE YOU OPEN CIRCUIT BREAKERS 2KS1, 2KS2 AND 4KS1, 4KS2. IF YOU DO NOT OBEY THIS SEQUENCE, THE PROBES WILL BECOME TOO HOT. THIS CAN CAUSE INJURY TO MAINTENANCE PERSONNEL AND/OR DAMAGE TO EQUIPMENT.

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ANTI ICE/PROBES/AOA/1	4DA1	D04
49VU	ANTI ICE/PROBES/PITOT/1	3DA1	D02
122VU	ANTI ICE/PROBES/2/TAT	1DA2	Y15
122VU	ANTI ICE/PROBES/2/PITOT	3DA2	Y14
122VU	ANTI ICE/PROBES/2/AOA	4DA2	Y13
122VU	ANTI ICE/PROBES/2/STATIC	5DA2	Y11
122VU	ANTI ICE/PROBES/3/PITOT	3DA3	Z16
122VU	ANTI ICE/PROBES/3/AOA	4DA3	Z15
122VU	ANTI ICE/PROBES/3/STATIC	5DA3	Z14
122VU	ANTI ICE/PROBES/1/STATIC	5DA1	Z13
122VU	ANTI ICE/PROBES/1/TAT	1DA1	Z12

Subtask 73-22-34-865-061-A ** ON A/C NOT FOR ALL

D. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ANTI ICE/PROBES/PHC/1	2DA1	D03
122VU	ANTI ICE/PROBES/PHC/3	2DA3	Y16
122VU	ANTI ICE/PROBES/PHC/2	2DA2	Y12

Subtask 73-22-34-865-053-A ** ON A/C NOT FOR ALL

WARNING: OPEN CIRCUIT BREAKERS 2KS1 AND 2KS2 AFTER YOU OPEN THE IGNITION CIRCUIT BREAKERS. IF NOT, THE CONTINUOUS IGNITION SYSTEM WILL BE ACTIVATED.

E. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1KS1 (EIU1)
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
FOR FIN: 1KS2 (EIU2)
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40

Subtask 73-22-34-865-058-A ** ON A/C NOT FOR ALL

F. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1KS1 (EIU1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
FOR FIN: 1KS2 (EIU2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40

Subtask 73-22-34-941-050-A ** ON A/C NOT FOR ALL

G. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put WARNING NOTICE(S) in position to tell persons not to operate:

The ENG/MODE selector switch, and
The ENG/MASTER 1(2) control switch.

(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).

Subtask 73-22-34-010-050-A ** ON A/C NOT FOR ALL

H. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 73-22-34-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Electronic Engine Control (EEC)

As an alternative to the tool P/N IAE1R19416, a strap wrench with a drive hole to accommodate torque wrench can be used.

NOTE: The "Visual mating indication" is another option to ensure the matting connector and the receptacle are fully engaged. In this case, any strap wrench such as BT-BS-611, Glenair TG-70 (or similar), insulated-jawed pliers Glenair TG-69 (or similar) can be used to ensure the "witness" band located on the receptacle is fully covered (not visible) when mated with the connector.

(1) Disconnect the electrical harness connectors from the Electronic Engine Control (EEC)

NOTE: EECs with hinged fire seals can be electrically disconnected without special tools.

Pre SBE 70-0056

(a) Use the IAE1R19416 WRENCH-SPECIAL 4 AND 8 SLOT CONNECTOR, LIFTING and disconnect the electrical harness connectors from the front and rear sides of the Electronic Engine Control (EEC) (4).
(b) Install CAP - BLANKING, PLASTIC on the connectors.

SBE 70-0056

(c) Open the hinged fireshield access panels on the EEC.
(d) Disconnect the electrical harness connectors from the front and rear sides of the EEC (4).
(e) Install CAP - BLANKING, PLASTIC on the connectors.

CAUTION: MAKE SURE THAT YOU DISCONNECT THE DATA ENTRY PLUG FROM THE EEC. DO NOT REMOVE OR CUT THE BACKSHELL CONNECTING CHAIN/CABLE THAT ATTACHES THE DATA ENTRY PLUG ASSEMBLY TO THE LP COMPRESSOR/ INTERMEDIATE CASE FLANGE. DAMAGE TO THE PARTS COULD RESULT.

(2) Disconnect the data entry plug

Pre SBE 70-0056

NOTE: The data entry plug assembly is permanently attached to the LP compressor/intermediate case flange by the connecting chain/cable. The data entry plug is an engine part and must stay with the engine. The connecting chain/cable is not an earth strap.

(a) Use the IAE1R19416 WRENCH-SPECIAL 4 AND 8 SLOT CONNECTOR, LIFTING and disconnect the data entry plug assembly (24) from the rear side of the EEC.
(b) Install CAP - BLANKING, PLASTIC on the plug connector.

SBE 70-0056

(c) Open the hinged fireshield access panels on the EEC.
(d) Disconnect the data entry plug assembly (24) from the rear side of the EEC.
(e) Install CAP - BLANKING, PLASTIC on the plug connector.
(3) Disconnect the hoses from the adaptors and the unions on the bottom of the EEC.
(a) Remove the wire that safeties the hose nuts (10), (13), (16), (20) and (23), the adaptors (15) and (22) and the unions (9), (12) and (19).
(b) Disconnect the hose nuts (10), (13), (16), (20) and (23) from the adaptors and unions.
(4) Remove the vent plug assembly.
(a) Remove the lockwire that safeties the vent plug assembly (17) to the EEC.
(b) Remove the vent plug assembly.
(5) Remove the EEC

WARNING: BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE EEC. THE EEC WEIGHS APPROXIMATELY 41LBS (18,6KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(a) Remove the bolt (5) which holds the ground cable (6) to the EEC.
(b) Remove the bolts (2) and the washers (7) from the four shock mounts and remove the EEC from the engine.
(6) Remove the adaptors and the unions from the EEC.
(a) Remove the adaptors (15) and (22) and the unions (9), (12) and (19) from the EEC.
(b) Remove the seal rings (8), (11), (14), (18) and (21) from the adaptors and the unions.
(c) Discard the seal rings.

Subtask 73-22-34-620-050-A ** ON A/C NOT FOR ALL

B. Install CAP - BLANKING to all openings.

[Rev.10 from 2021] 2026.04.01 13:00:41 UTC