Operational Test of the Thrust Reverser without CFDS - Engine Not Running [CFMB]

TASK 78-31-00-710-043-A
Operational Test of the Thrust Reverser without CFDS - Engine Not Running

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	GENERATOR - LOW FREQUENCY
No specific	AR	PLIERS - NOSE, SOFT, LONG

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 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 77-11-20-000-002-A	Removal of the N2 Speed Sensor .
FOR [1000EM1] (ENGINE-1)
TASK 29-23-00-863-001-A	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
TASK 29-23-00-864-001-A	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
FOR [1000EM2] (ENGINE-2)
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System

3. Job Set-up
Subtask 78-31-00-860-055-A ** ON A/C NOT FOR ALL

A. On the overhead panel 40VU, make sure that:

WARNING: MAKE SURE THAT THE PUMPS CAN NOT OPERATE AUTOMATICALLY. THIS IS TO PREVENT INJURY TO PERSONS WHEN YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS.

(1) The HYD/BLUE/ELEC PUMP pushbutton switch is released.
(2) The HYD/YELLOW/ELEC PUMP pushbutton switch is pushed.

Subtask 78-31-00-861-051-A ** ON A/C NOT FOR ALL

B. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).

Subtask 78-31-00-865-052-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B08
121VU	HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST	1881GP	N35
FOR FIN: 1000EM1 (ENGINE1)
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
FOR FIN: 1000EM2 (ENGINE2)
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40

Subtask 78-31-00-860-056-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) 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 (the pushbutton switch is pushed in).
(2) Do the EIS start procedure (ECAM display units only). (Ref. AMM TASK 31-60-00-860-001).

Subtask 78-31-00-010-050-A ** ON A/C NOT FOR ALL

E. 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 78-31-00-020-050-A ** ON A/C NOT FOR ALL

F. On the accessory gearbox of the engine 1(2):
(1) Disconnect the two connectors (channel A and channel B) from the N2 speed sensor. For the N2 speed sensor location, (Ref. AMM TASK 77-11-20-000-002)

Subtask 78-31-00-480-050-A ** ON A/C NOT FOR ALL

G. Install a Low Frequency Generator:

WARNING: MAKE SURE THAT THE LOW FREQUENCY GENERATOR AND ITS WIRING ARE NOT IN THE DEPLOYMENT RANGE OF THE THRUST REVERSERS. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY TO PERSONNEL AND/OR DAMAGE TO EQUIPMENT CAN OCCUR.

(1) Connect a GENERATOR - LOW FREQUENCY, (sinusoidal waveform, output voltage 10/15 volts) across the terminals 2(+) and 1(-).

4. Procedure
Subtask 78-31-00-710-051-A ** ON A/C NOT FOR ALL

WARNING: MAKE SURE THAT THE TRAVEL RANGE OF THE THRUST REVERSER IS CLEAR BEFORE YOU PRESSURIZE THE HYDRAULIC SYSTEM. IF YOU DO NOT OBEY THESE INSTRUCTIONS, INJURY TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

A. Do this test:

ACTION	RESULT
1.On the overhead maintenance panel 50VU: Release the HYD/LEAK MEASUREMENT VALVES/B/G/Y pushbutton switches.	The OFF legends of these pushbutton switches come on.
2.On the flight control panel 23VU: Push the FLT CTL/SEC 1 pushbutton switch.	The OFF legend of this pushbutton switch goes off.
3.On the overhead maintenance panel 50VU: Release the ENG/FADEC GND PWR/1(2) pushbutton switch.	The ON legend of this pushbutton switch comes on.
4.On the engine 1(2): Supply a frequency of 6000Hz with the low frequency generator.	On the upper ECAM display unit: The N1 and N2 indications for the engine 1(2) must be approximately: . N1 = 20 percent . N2 = 60 percent
5. FOR [1000EM1]
Pressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-863-001).	On the lower ECAM display unit, on the HYD page: The pressure indication must be 3000 psi (206.84 bar) for the Green system (engine 1).
6. FOR [1000EM2]
Pressurize the Yellow hydraulic system for the engine 2 (Ref. AMM TASK 29-24-00-863-001).	On the lower ECAM display unit, on the HYD page: The pressure indication must be 3000 psi (206.84 bar) for the Yellow system (engine 2).
7.Set the thrust reverser control lever of the engine 1(2) to the reverse idle position (detent).	On the upper ECAM display unit: The amber REV indication comes into view in the N1 indication of the engine 1(2) during the deployment. The REV indication changes to green when the blocker doors are deployed and locked.
8.Set the throttle control lever of the engine 1(2) to the idle stop position (the zero mark on the graduated sector).	On the upper ECAM display unit: The REV indication in the N1 indication of the engine 1(2) changes to amber during the stowage of the blocker doors. The REV indication goes out of view when the blocker doors are stowed and locked.
9.On the low frequency generator: Decrease the frequency to zero.	On the upper ECAM display unit: The N1 and N2 indications of the engine 1(2) go back to zero.
10. FOR [1000EM1]
Depressurize the Green hydraulic system (Ref. AMM TASK 29-23-00-864-001),	On the lower ECAM display unit, on the HYD page: The pressure indication goes back to zero for: . the Green system (engine 1),
11. FOR [1000EM2]
Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).	On the lower ECAM display unit, on the HYD page: The pressure indication goes back to zero for: . the Yellow system (engine 2).
12.On the overhead maintenance panel 50VU: Push the ENG/FADEC GND PWR/1(2) pushbutton switch.	The ON legend of this pushbutton switch goes off.
Push the HYD/LEAK MEASUREMENT VALVES/B/G/Y pushbutton switches.	The OFF legends of these pushbutton switches go off.
13.On the flight control panel 23VU: Release the FLT CTL/SEC 1 pushbutton switch.	The OFF legend of this pushbutton switch comes on.

5. Close-up
Subtask 78-31-00-080-050-A ** ON A/C NOT FOR ALL

A. On the accessory gearbox of the engine 1(2):
(1) Disconnect the low frequency generator.

Subtask 78-31-00-420-050-A ** ON A/C NOT FOR ALL

B. Connect the two connectors to the N2 speed sensor (channel A and channel B). Tighten them with your hand plus one eight of a turn with the PLIERS - NOSE, SOFT, LONG.

Subtask 78-31-00-710-052-A ** ON A/C NOT FOR ALL

C. Do this test:

ACTION	RESULT
1.On the overhead maintenance panel 50VU: Release the ENG/FADEC GND PWR/1(2) pushbutton switch.	The ON legend of this pushbutton switch comes on.
2.On the upper ECAM display unit: Make sure that there is no indication related to the N2 speed sensor.
3.On the overhead maintenance panel 50VU: Push the ENG/FADEC GND PWR/1(2) pushbutton switch.	The ON legend of this pushbutton switch goes off.

Subtask 78-31-00-860-057-A ** ON A/C NOT FOR ALL

D. Do the EIS Stop Procedure: (Ref. AMM TASK 31-60-00-860-002)

Subtask 78-31-00-410-050-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 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

Subtask 78-31-00-862-051-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 03:23:58 UTC