Functional Test of the Lavatory Smoke-Detector Sensitivity

TASK 26-17-00-720-001-A
Functional Test of the Lavatory Smoke-Detector Sensitivity

ZONE: 200

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	MULTIMETER - STANDARD
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Consumable Materials

REFERENCE	DESIGNATION
No specific	test plug assembly

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
200	UPPER HALF FUSELAGE

D. 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 26-17-15-000-001-A	Removal of the Lavatory Smoke Detector
TASK 26-17-15-000-008-A	Removal of the Lavatory Smoke Detector
TASK 26-17-15-400-001-A	Installation of the Lavatory Smoke Detector
TASK 26-17-15-400-007-A	Installation of the Lavatory Smoke Detector
TASK 31-32-00-860-005-A	Procedure to Get Access to the SYSTEM REPORT/TEST FIRE PROT Page
Smoke-Detector Test Plug Assembly
Lavatory Smoke Detector - Visual Identification

3. Job Set-up
Subtask 26-17-00-861-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 26-17-00-865-050-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
49VU	AIR COND/SDCU/CHAN1	11WQ	C06
122VU	AIR COND/SDCU/CHAN2	12WQ	T18
122VU	AIR COND/LAV/GALLEY VENT CTL/EXTRACT FAN/CTL	5HU	U21

Subtask 26-17-00-010-057-A ** ON A/C NOT FOR ALL

C. For access only to the related lavatory smoke-detector (removal not necessary):

LAV. A (Ref. AMM TASK 26-17-15-000-001)
LAV. B, D, E, F, H, K, L and M (Ref. AMM TASK 26-17-15-000-008)

Subtask 26-17-00-480-050-AX ** ON A/C NOT FOR ALL

D. Preparation for the Test
(1) Connect a test plug assembly and a MULTIMETER - STANDARD between the smoke detector and the electrical connector.

Smoke-Detector Test Plug Assembly ** ON A/C NOT FOR ALL

Lavatory Smoke Detector - Visual Identification ** ON A/C NOT FOR ALL

NOTE: The minimum input resistance of the multimeter must be 10 MEG OHMS.

Subtask 26-17-00-865-051-A ** ON A/C NOT FOR ALL

E. 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
49VU	AIR COND/SDCU/CHAN1	11WQ	C06
122VU	AIR COND/SDCU/CHAN2	12WQ	T18

4. Procedure
Subtask 26-17-00-720-051-A ** ON A/C NOT FOR ALL

A. Sensitivity Test of the Lavatory Smoke-Detector (ionization type smoke-detector) with the Part Number PAI 2830-00

NOTE: The voltage is between 6 and 6.5 VDC when the SDCU does an automatic test of the smoke detectors. The sensitivity check must be done after approximately 10 seconds, with the detector in stand-by condition.

(1) Do this test:

ACTION	RESULT
1.On the test plug assembly:	On the multimeter:
Read the voltage shown on the multimeter.	The voltage is between 4 and 5 VDC.

Subtask 26-17-00-720-052-A ** ON A/C NOT FOR ALL

B. Sensitivity Test of the Lavatory Smoke-Detector (photo-electric type smoke-detector) with the Part Number PPA 12XX-XX or GPA 1202-00

ACTION	RESULT
1.On the test plug assembly:	On the multimeter:
Read the resistance shown on the multimeter.	The minimum resistance is 200 ohms.

Subtask 26-17-00-720-052-B ** ON A/C NOT FOR ALL

B. Sensitivity Test of the Lavatory Smoke-Detector (photo-electric type smoke-detector) with the Part Number PPA 12XX-XX or GPA 1202-00

ACTION	RESULT
1.On the test plug assembly:	On the multimeter:
Read the resistance shown on the multimeter.	The minimum resistance is 200 ohms.

Subtask 26-17-00-865-055-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/SDCU/CHAN1	11WQ	C06
122VU	AIR COND/SDCU/CHAN2	12WQ	T18

Subtask 26-17-00-420-052-A ** ON A/C NOT FOR ALL

D. Connect the smoke detector
(1) Disconnect the electrical connectors of the test plug assembly.
(2) Connect the electrical connector to the related smoke detector.
(3) Repeat the test for each lavatory smoke detector.

Subtask 26-17-00-865-052-A ** ON A/C NOT FOR ALL

E. 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
49VU	AIR COND/SDCU/CHAN1	11WQ	C06
122VU	AIR COND/SDCU/CHAN2	12WQ	T18

Subtask 26-17-00-710-051-A ** ON A/C NOT FOR ALL

F. Test
(1) Do the test with the CFDS (Ref. AMM TASK 31-32-00-860-005).

5. Close-up
Subtask 26-17-00-410-056-A ** ON A/C NOT FOR ALL

A. For installation of items removed for access, refer to the related lavatory:

LAV A (Ref. AMM TASK 26-17-15-400-001)
LAV B, D, E, F, H, K, L and M (Ref. AMM TASK 26-17-15-400-007)

Subtask 26-17-00-862-050-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:44:06 UTC