Installation of the Electronic Engine Control (EEC) Cooling Blower (Lower) (PRE SB72-0191) [CFML]

TASK 75-24-05-400-801-A
Installation of the Electronic Engine Control (EEC) Cooling Blower (Lower) (PRE SB72-0191)

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 4605KS11
FIN: 4605KS12

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 23.23 and 21.06 lbf.in (0.26 and 0.24 m.daN )
No specific	Torque wrench: range to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2442)	engine oil

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-70-00-910-804-A	Electrical Standard Practices
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 73-29-00-740-806-A	Blower Test (Menu Mode)
TASK 75-24-05-400-803-A	Installation of the EEC Blower Fire Shield Blanket (PRE SB72-0191)
Electronic Engine Control (EEC) Cooling Blower (Lower)

3. Job Set-up
Subtask 75-24-05-941-051-A

A. 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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).

Subtask 75-24-05-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	EEC BLOWER/ENG2	90KS2	M44
121VU	EEC BLOWER/ENG1	90KS1	P44

Subtask 75-24-05-010-051-A

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

4. Procedure
Subtask 75-24-05-420-050-A

A. Installation of the Electronic Engine Control (EEC) Cooling Blower (Lower) (1)

WARNING: USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.

(1) Remove all COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
(2) Make sure that the mating surfaces are clean and clear of unwanted materials.
(3) Lubricate the threads of the four captive bolts (9) with the engine oil (Material No.CP2442) .
(4) Install the EEC cooling blower (lower) (1) in the correct position on the mounting bracket (11).
(5) Install the four captive bolts (9) on the mounting bracket (11) and tighten them with your hand.
(6) TORQUE the four captive bolts (9) to between 120.75 and 109.25 lbf.in (1.36 and 1.23 m.daN )

.
(7) Installation of the EEC cooling duct (out) (4) on the EEC cooling blower (lower) (1):
(a) Lubricate the threads of the screw (7) with the engine oil (Material No.CP2442) .
(b) Connect the EEC cooling duct (out) (4) on the EEC cooling blower (lower) (1).
(c) Install the clip (8) to attach the EEC cooling duct (out) (4) to the EEC cooling blower (lower) (1).
(d) Tighten the screw (7) on the clip (8) by hand.
(e) Torque the screw (7) to between 23.23 and 21.06 lbf.in (0.26 and 0.24 m.daN )

.
(8) Installation of the EEC cooling duct (in) (3) on the EEC cooling blower (lower) (1):
(a) Make sure that the mating surfaces are clean and clear of unwanted materials.
(b) Lubricate the threads of the screw (5) with the engine oil (Material No.CP2442) .
(c) Connect the EEC cooling duct (in) (3) to the EEC cooling blower (lower) (1).
(d) Install the clip (6) to attach the EEC cooling duct (in) (3) to the EEC cooling blower (lower) (1).
(e) Tighten the screw (5) on the clip (6) by hand.
(f) Torque the screw (5) to between 23.23 and 21.06 lbf.in (0.26 and 0.24 m.daN )

.
(9) Connection of the harness electrical connector (Ref. AMM TASK 70-70-00-910-804):

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(a) Connect the HJ2A harness electrical connector (2) to the EEC cooling blower (lower) (1).
(10) Install the EEC blower fire shield blanket (10) (Ref. AMM TASK 75-24-05-400-803).

5. Close-up
Subtask 75-24-05-865-052-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	EEC BLOWER/ENG2	90KS2	M44
121VU	EEC BLOWER/ENG1	90KS1	P44

Subtask 75-24-05-710-050-A

B. Test
(1) Do the Blower Test (Menu Mode) (Ref. AMM TASK 73-29-00-740-806).

Subtask 75-24-05-410-050-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:09:13 UTC