Removal of the Fuel Flow Transmitter [CFMB]

TASK 73-31-10-000-002-A
Removal of the Fuel Flow Transmitter

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** 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	PLIERS - NOSE, SOFT, LONG
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP5066)	fuel system preventative

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-21-00-918-002-A	Seals (Preformed Packings and O-rings) and Gaskets
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
Fuel Flow Transmitter Mounting

3. Job Set-up
Subtask 73-31-10-941-051-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 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 73-31-10-010-053-A ** ON A/C NOT FOR ALL

B. 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

Subtask 73-31-10-040-052-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 73-31-10-010-054-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 73-31-10-020-051-A ** ON A/C NOT FOR ALL

A. Removal of the Fuel Flow Transmitter:
(1) Disconnect the electrical connector (130) from the fuel flow transmitter (140).
Use PLIERS - NOSE, SOFT, LONG if necessary.
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the bolt (50) and nut (80) from the clamp (60) that attaches the electrical connector (130) to the support bracket (70).Remove the clamp (60).
(4) Remove the fuel supply tube (200) as follows:
(a) Remove the bolts (210) that attach the fuel supply tube (200) to the discharge port of the hydromechanical unit (HMU).
(b) Remove the bolts (190) that attach the fuel supply tube (200) to the fuel flow transmitter (140).
(c) Remove the fuel supply tube (200).
(d) Remove and discard the O-ring (180).
(e) Remove the gasket (220).
(5) Do an inspection of the gasket (220). Discard the gasket (220) if it is damaged (Ref. AMM TASK 70-21-00-918-002).
(6) Install PLUG - BLANKING on the open discharge port of the HMU and on the open ends of the fuel supply tube (200).
(7) Remove the bolts (150) and washers (160) that attach the inlet bracket (170) to the HMU.
(8) Remove the bolts (100) and washers (110) that attach the discharge bracket (120) to the HMU.
(9) Disconnect the fuel supply hose (20) from the union (10) of the fuel injected supply tube.
(10) Remove the fuel flow transmitter (140) with the inlet bracket (170), discharge bracket (120), and supply hose (20) installed.
(11) Remove the inlet bracket (170) from the fuel flow transmitter (140).
(12) Remove the fuel supply hose (20) as follows:
(a) Remove the bolts (30) that attach the fuel supply hose (20) to the fuel flow transmitter (140).
(b) Remove the remaining bolts (40) and support bracket (70) from the flange of the fuel supply hose (20).
(c) Remove the fuel supply hose (20).
(d) Remove and discard the O-ring (90).
(e) Install PLUG - BLANKING on the fuel supply hose (20) and the union (10) of the fuel injected supply tube.
(13) Disengage the alignment pin on the fuel flow transmitter (140) from the discharge bracket (120). Remove the fuel flow transmitter (140).
(14) After removal, fill the fuel flow transmitter with fuel system preventative (Material No.CP5066) for preservation.
(15) Install CAP - BLANKING on the fuel flow transmitter (140).

[Rev.10 from 2021] 2026.04.01 02:59:54 UTC