Removal of the Oil Pressure Transmitter [CFMB]

TASK 79-33-15-000-041-A
Removal of the Oil Pressure Transmitter

FIN: 4003EN ** 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	CONTAINER 5 L (1.32 USGAL)
No specific	AR	COVER - PROTECTION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

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 71-13-00-010-040-B	Opening of the Fan Cowl Doors
Oil Pressure Transmitter

3. Job Set-up
Subtask 79-33-15-941-050-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.
(b) Put a WARNING NOTICE(S) in position to tell persons that both thrust reverser control lever are not operational.
(2) Make sure that 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 79-33-15-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
121VU	ENGINE/ENG1/OIL/PRESS	2EN1	N40
FOR FIN: 1000EM2 (ENGINE2)
121VU	ENGINE/ENG2/OIL/PRESS	2EN2	N42

Subtask 79-33-15-010-050-A ** ON A/C NOT FOR ALL

C. Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 79-33-15-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Oil Pressure Transmitter
(1) Remove the bonding strap (30) from the oil pressure (25) transmitter.
(a) Remove the nut (50) and the washers (40), (45) from the ground stud on the bracket.
(b) Remove the nut (50) the washers (40), (45) and bolt (35) and remove the bonding strap (30).
(2) Disconnect the electrical connector 4003ENA from the oil pressure transmitter (25).
(3) Put a CONTAINER 5 L (1.32 USGAL) below the transmitter (25) to catch the drained oil.
(4) Disconnect the tube (28) from the union (20) and from the tee fitting and let the oil drain into the container.

NOTE: Use a second wrench to hold the union (20) and tee fitting when you loosen the tube (28).

(5) Disconnect the tube (32) from the tee fitting and from the tube fitting and let the oil drain into the container.

NOTE: Use a second wrench to hold tee fitting and tube fitting when you loosen the tube (32).

(6) Disconnect the tee fitting from the union (20).
(7) Remove the bolts (5) and the clamps (10) that attach the transmitter (25) to the bracket.
(8) Remove the unions (20) and the packings (15) from the transmitter (25). Discard the packings.
(9) Put COVER - PROTECTION on the electrical connector, the transmitter (25), the tee fitting and tube coupling nuts.

[Rev.10 from 2021] 2026.04.01 03:39:45 UTC