Installation of the Nacelle Anti-Ice Fan-Pressure-Transducer

TASK 30-21-23-400-801-A
Installation of the Nacelle Anti-Ice Fan-Pressure-Transducer

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

ZONE: 436
ZONE: 446
FIN: 4002DN ** 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	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	PLIERS - CONNECTOR, JAW, SOFT
No specific	Torque wrench: range to between 70 and 63 lbf.in (0.79 and 0.71 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU5-0003)	Never-Seez Pure Nickel Special

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
436	FAN AND ACCESSORY GEARBOX
446	FAN AND ACCESSORY GEARBOX
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 30-21-00-710-002-A	Operational Check of the Engine-Air-Intake Ice-Protection System (with the Engines in operation)
TASK 30-21-12-400-801-A	Installation of the Nacelle Anti-Ice Sense-Tubes
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
Nacelle Anti-Ice Fan-Pressure-Transducer

3. Job Set-up
Subtask 30-21-23-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).

Subtask 30-21-23-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-23-010-052-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

4. Procedure

CAUTION: REMOVE AND INSTALL PROTECTION COVERS AS NECESSARY TO PREVENT DAMAGE TO THE ENGINE AND ADJACENT COMPONENTS.

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 30-21-23-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Nacelle Anti-Ice Fan-Pressure-Transducer (4002DN)

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

CAUTION: USE TEFLON-JAWED PLIERS TO LOOSEN/TIGHTEN ELECTRICAL CONNECTORS. DO NOT USE METAL-JAWED PLIERS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ELECTRICAL CONNECTORS CAN OCCUR.

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN TWIST THE TUBES OR HOSES OR CAUSE DAMAGE TO THEM.

(1) Apply a thin layer of Never-Seez Pure Nickel Special (Material No.PU5-0003) to the threads of the two bolts (3).
(2) Install the transducer (1) (4002DN) on the fan case with the two bolts (3) and two washers (2).
(3) TORQUE the bolts (3) to between 70 and 63 lbf.in (0.79 and 0.71 m.daN )

.
(4) Remove the COVER - PROTECTION from the transducer 2 sense tube and transducer (1).
(5) Connect the transducer 2 sense-tube to the transducer (1) (Ref. AMM TASK 30-21-12-400-801).
(6) Remove the COVER - PROTECTION from the transducer harness connector. Make sure that the electrical connector is clean and in the correct condition.
(7) Connect the transducer harness connector (4002DN-A) to the transducer (1).
(8) Tighten the connector on the harness with PLIERS - CONNECTOR, JAW, SOFT. Continue to tighten the connector until the PLIERS - CONNECTOR, JAW, SOFT no longer hold the connector ring and cannot turn it. Make sure you feel the ratchet feature on the connector as you tighten it.

NOTE: Lightly push the connector in and from side-to-side as you tighten it.

5. Close-up
Subtask 30-21-23-410-051-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) Remove the access platform(s).
(3) Close the fan cowls (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(4) Remove the WARNING NOTICE(S).
(5) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).

Subtask 30-21-23-865-052-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	ANTI ICE/ENG/2	1DN2	W10
122VU	ANTI ICE/ENG/1	1DN1	X10

Subtask 30-21-23-710-050-A ** ON A/C NOT FOR ALL

C. Do an operational test of the engine air intake ice protection (with the engines in operation) (Ref. AMM TASK 30-21-00-710-002).

Subtask 30-21-23-862-050-A ** ON A/C NOT FOR ALL

D. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 00:29:16 UTC