Installation of the Static Inverter

TASK 25-18-51-400-001-A
Installation of the Static Inverter

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

CAUTION: BEFORE YOU INSTALL/REMOVE THE GSE-TOOL, READ THE INSTRUCTIONS IN THE APPLICABLE GSE INSTRUCTION MANUAL. WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT OBEY THE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.

ZONE: 121
ZONE: 122
FIN: 3NA ** 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 2M (6 FT) - ADJUSTABLE
No specific	1	VOLTMETER - TRUE RMS AC VOLTAGE MEASURING
99D24003000001	1	PLUG-ELECTRICAL TEST

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121	AVIONICS COMPARTMENT
122	AVIONICS COMPARTMENT
811

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
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 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Static Inverter ** ON A/C NOT FOR ALL
Static Inverter ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 25-18-51-861-051-A ** ON A/C NOT FOR ALL

A. Make sure that the electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).

Subtask 25-18-51-865-051-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
121VU	PILOTS OUTLETS/STAT INV	1NA	K25
121VU	PILOTS OUTLETS/115V 60HZ	2NA	K23

Subtask 25-18-51-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position, at zone 120.
(2) Make sure that avionics compartment access-door 811 is open (Ref. AMM TASK 52-41-00-010-002).

4. Procedure
Subtask 25-18-51-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Static Inverter

Static Inverter ** ON A/C NOT FOR ALL

(1) Put the static inverter (2) in position on the plate assembly (1) and hold it.
(2) Install the washers (4) and the screws (3).
(3) Tighten the screws (3).
(4) Remove the CAP-BLANKING from each electrical connector and receptacle.
(5) Make sure that all the electrical connections are clean and in the correct condition.
(6) Carefully connect the electrical connector (5) to the static inverter (2) not to cause damage.

Subtask 25-18-51-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the Static Inverter

Static Inverter ** ON A/C NOT FOR ALL

(1) Put the static inverter (1) in position on the bracket assembly and hold it.
(2) Install the washers (2) and the screws (3).
(3) Do the electrical bonding on the applicable location of the static inverter (1) (Ref. AMM TASK 20-28-00-912-802).
(4) Install the washer (5) and the screw (4).
(5) Tighten the screws (3) and (4).
(6) Remove the CAP-BLANKING from each electrical connector and receptacle.
(7) Make sure that all the electrical connections are clean and in the correct condition.
(8) Carefully connect the electrical connector (6) to the static inverter (1) not to cause damage.

Subtask 25-18-51-865-052-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
121VU	PILOTS OUTLETS/STAT INV	1NA	K25
121VU	PILOTS OUTLETS/115V 60HZ	2NA	K23

Subtask 25-18-51-710-050-A ** ON A/C NOT FOR ALL

C. Test

NOTE: One of these two tools is necessary for this test: the 99D24003000001 PLUG-ELECTRICAL TEST or the VOLTMETER - TRUE RMS AC VOLTAGE MEASURING.

(1) For the test with the 99D24003000001 PLUG-ELECTRICAL TEST:
(a) On CAPT hand-microphone panel 17VU:
1 Connect the 99D24003000001 PLUG-ELECTRICAL TEST to the CAPT outlet (5NA).
2 On the 99D24003000001 PLUG-ELECTRICAL TEST, push the pushbutton switch. A light comes on.
3 Connect the voltmeter to the 99D24003000001 PLUG-ELECTRICAL TEST and make sure that the voltage is 115VAC.
4 Disconnect the voltmeter from the 99D24003000001 PLUG-ELECTRICAL TEST.
5 Release the pushbutton switch. A light goes off.
6 Disconnect the 99D24003000001 PLUG-ELECTRICAL TEST from the CAPT outlet (5NA).
(b) On F/O hand-microphone panel 16VU:
1 Connect the 99D24003000001 PLUG-ELECTRICAL TEST to the F/O outlet (4NA).
2 On the 99D24003000001 PLUG-ELECTRICAL TEST, push the pushbutton switch. A light comes on.
3 Connect the voltmeter to the 99D24003000001 PLUG-ELECTRICAL TEST and make sure that the voltage is 115VAC.
4 Disconnect the voltmeter from the 99D24003000001 PLUG-ELECTRICAL TEST.
5 Release the pushbutton switch. A light goes off.
6 Disconnect the 99D24003000001 PLUG-ELECTRICAL TEST from the F/O outlet (4NA).
(2) For the test with the VOLTMETER - TRUE RMS AC VOLTAGE MEASURING:
(a) Do the steps that follow for the CAPT outlet:
1 On panel 121VU, open circuit breaker PILOTS OUTLETS 2NA.
2 On CAPT hand-microphone panel 17VU, connect the VOLTMETER - TRUE RMS AC VOLTAGE MEASURING to the CAPT outlet (5NA).
3 On panel 121VU, close circuit breaker PILOTS OUTLETS 2NA.
4 Make sure that the voltage is 115VAC.
5 On panel 121VU, open circuit breaker PILOTS OUTLETS 2NA.
6 Disconnect the VOLTMETER - TRUE RMS AC VOLTAGE MEASURING from the CAPT outlet (5NA).
7 On panel 121VU, close circuit breaker PILOTS OUTLETS 2NA.
(b) Do the steps that follow for the F/O outlet:
1 On panel 121VU, open circuit breaker PILOTS OUTLETS 2NA.
2 On F/O hand-microphone panel 16VU, connect the VOLTMETER - TRUE RMS AC VOLTAGE MEASURING to the F/O outlet (4NA).
3 On panel 121VU, close circuit breaker PILOTS OUTLETS 2NA.
4 Make sure that the voltage is 115VAC.
5 On panel 121VU, open circuit breaker PILOTS OUTLETS 2NA.
6 Disconnect the VOLTMETER - TRUE RMS AC VOLTAGE MEASURING from the F/O outlet (4NA).
7 On panel 121VU, close circuit breaker PILOTS OUTLETS 2NA.

5. Close-up
Subtask 25-18-51-410-050-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) Close avionics compartment access-door 811 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

Subtask 25-18-51-862-050-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:29:40 UTC