Inspection of the EEC Pb Inlet Port [IAE]

TASK 73-22-49-220-010-A
Inspection of the EEC Pb Inlet Port

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	LIGHT SOURCE - WHITE
No specific	AR	MAGNIFYING GLASS POWER 10X
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 150 and 142 lbf.in (1.70 and 1.60 m.daN )
No specific	Torque wrench: range to between 181 and 168 lbf.in (2.05 and 1.90 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-126)	lockwire
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	SEAL RING	AIPC 73-22-34-80-090

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-40-11-911-014-A	Locking Devices General Information
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Burner Pressure Sensor Tube

3. Job Set-up
Subtask 73-22-49-941-052-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure tha the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 73-22-49-010-052-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 73-22-49-020-054-A ** ON A/C NOT FOR ALL

A. Disconnect the flexible hose
(1) Cut and discard the lockwire from the flexible hose (4) connector.
(2) Disconnect the flexible hose (4) from the Electronic Engine Control (EEC) (1).

Subtask 73-22-49-220-050-A ** ON A/C NOT FOR ALL

B. Examine the EEC burner pressure sensor inlet port
(1) Remove the union (3) from the EEC sensor inlet port and discard the seal ring (2).

PRE SBE 73-0185 or PRE SBE 73-0186 or PRE SBE 73-0220

(2) Use a MAGNIFYING GLASS POWER 10X and a LIGHT SOURCE - WHITE to visually examine the sensor screen. If you can see white powder contamination on the sensor screen, replace the EEC.

END OF PRE SBE 73-0185 or PRE SBE 73-0186 or PRE SBE 73-0220

POST SBE 73-0185 or POST SBE 73-0186 or POST SBE 73-0220

(3) No inspection is necessary. Do the next step.

NOTE: Engines which have SBE 73-0185 or SBE 73-0186 or SBE 73-0220 incorporated do not have a sensor screen.

END OF POST SBE 73-0185 or POST SBE 73-0186 or POST SBE 73-0220

Subtask 73-22-49-160-053-A ** ON A/C NOT FOR ALL

C. Clean the EEC inlet port
(1) If there is water in the EEC inlet port, dry the area with a Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Blow out the inner diameter of the union (3) to remove all water with nitrogen or clean dry air.

Subtask 73-22-49-420-054-A ** ON A/C NOT FOR ALL

D. Install the union and the flexible hose.

NOTE: Make sure that all the PB sense line pipes are connected correctly. Joints that leak let moisture into the lines and increase PB problems.

(1) Install a new AIPC 73-22-34-80-090 SEAL RING (2) on the union (3).
(2) Install the union in the EEC (PB) inlet port with the external cone end toward the flexible hose (4).
(3) TORQUE the union to between 181 and 168 lbf.in (2.05 and 1.90 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(4) Safety the union with lockwire (Material No.V02-126) (Ref. AMM TASK 70-40-11-911-014).
(5) Install and connect the flexible hose connector to the union.
(6) TORQUE the connector to between 150 and 142 lbf.in (1.70 and 1.60 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(7) Safety the connector with lockwire (Material No.V02-126) .

5. Close-up
Subtask 73-22-49-410-052-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010) :
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 03:01:19 UTC