Installation of the Burner Selection Valve (BSV) [CFMI]

TASK 73-11-70-400-001-A
Installation of the Burner Selection Valve (BSV)

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	PLIERS - JAWED, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2101)	graphite grease

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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
20	GASKET	AIPC 73-11-70-01-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-21-00-918-001-A	Seals (Preformed Packings and O-rings) and Gaskets
TASK 71-00-00-710-006-A	Minimum Idle Check
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 73-29-00-710-040-A-01	FADEC Ground Test Without the CFDS
TASK 73-29-00-710-040-A	Operational Test of the FADEC on the ground (with Engine Motoring)
TASK 73-29-00-710-040-A-01	FADEC Ground Test Without the CFDS
TASK 73-29-00-710-040-A-02	Operational Test of the FADEC on the Ground (with Engine non Motoring)
TASK 78-30-00-081-041-A	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
Burner Selection Valve (BSV) PRE SB 73-121
Burner Selection Valve (BSV) POST SB 73-121

3. Job Set-up
Subtask 73-11-70-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 73-11-70-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-11-70-040-051-A ** ON A/C NOT FOR ALL

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

4. Procedure
Subtask 73-11-70-420-050-A ** ON A/C NOT FOR ALL

A. Install the Burner Staging Valve as follows:
(1) Do an inspection of the AIPC 73-11-70-01-050 GASKET (20) (Ref. AMM TASK 70-21-00-918-001).
(2) Remove the protective covers from the BSV (70) and the fuel supply manifold.
(3) Install the gasket (20) between the BSV (70) and the fuel supply manifold.
(4) Install the BSV (70) on the fuel supply manifold.

Subtask 73-11-70-640-050-A ** ON A/C NOT FOR ALL

B. Lubricate the bolts (10, 40) with graphite grease (Material No.CP2101) .

Subtask 73-11-70-420-052-A ** ON A/C NOT FOR ALL

C. Attach BSV, as follows:

PRE SB 73-121

Burner Selection Valve (BSV) PRE SB 73-121 ** ON A/C NOT FOR ALL

(1) Install the bolts (10) with the heads up.
(2) Install the nuts (30) to the bolts (10).
(3) Install the bolts (40) with the heads down.
(4) Install the nuts (80) to the bolts (40).
(5) TORQUE the nuts (30, 80) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

.
(6) Remove the protective caps from the electrical connectors.

END PRE SB 73-121

POST SB 73-121

Burner Selection Valve (BSV) POST SB 73-121 ** ON A/C NOT FOR ALL

(7) Install the bolt (10) and bolt (40) in the aft end of BSV.
(8) Install the nut (30) to the bolt (10).
(9) Install the nut (80) to the bolt (40).
(10) Install the bolt (10) and bolt (40) in the fuel support bracket.
(11) TORQUE the nuts (30, 80) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

.
(12) TORQUE bolts (10, 40) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

.
(13) Remove the protective caps from the electrical connectors.

END POST SB 73-121

Subtask 73-11-70-420-051-A ** ON A/C NOT FOR ALL

D. Connect the electrical connectors, Channel A (50) and Channel B (60), to the BSV (70). Tighten the connectors by hand plus one eight of a turn.

NOTE: If necessary, use PLIERS - JAWED, SOFT.

Subtask 73-11-70-410-051-A ** ON A/C NOT FOR ALL

E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 73-11-70-440-050-A ** ON A/C NOT FOR ALL

F. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041)

Subtask 73-11-70-710-050-A ** ON A/C NOT FOR ALL

G. Do the test:
(1) Do a FADEC ground test (Ref. AMM TASK 73-29-00-710-040).

NOTE: As an alternative procedure, you can do this operational test without the CFDS (Ref. AMM TASK 73-29-00-710-040).

(2) Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).

Subtask 73-11-70-710-050-B ** ON A/C NOT FOR ALL

G. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006) and make sure that on the CFDS no fault is shown related to the BSV.

5. Close-up
Subtask 73-11-70-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:54:45 UTC