Cleaning of the Avionics-Compartment Smoke-Detector Piccolo-Tubes

TASK 26-15-00-100-001-A
Cleaning of the Avionics-Compartment Smoke-Detector Piccolo-Tubes

ZONE: 128

1. Reason for the Job
Refer to the MPD TASK: 261500-03
CLEAN AVIONICS SMOKE DETECTION PICCOLO TUBES
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	AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
128	REAR AVIONIC COMPARTMENT
824

C. Referenced Information

REFERENCE	DESIGNATION
TASK 21-26-41-000-002-A	Removal of the Air Extraction Duct
TASK 21-26-41-400-002-A	Installation of the Air Extraction Duct
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 26-15-00-710-001-A	Operational Test of the Avionics Smoke Detection
TASK 26-15-15-000-001-A	Removal of the Smoke Detector - Avionics Compartment
TASK 26-15-15-400-001-A	Installation of the Smoke Detector - Avionics Compartment
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Avionics-Compartment Smoke-Detector Piccolo-Tubes

3. Job Set-up
Subtask 26-15-00-861-052-A

A. Energize the ground service network (Ref. AMM TASK 24-42-00-861-001).

Subtask 26-15-00-010-051-A

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at the access door 824.
(2) Open the access door 824.

Subtask 26-15-00-020-050-A

C. Removal of the Duct
(1) Remove the avionics compartment smoke detector (Ref. AMM TASK 26-15-15-000-001).
(2) Remove the duct (Ref. AMM TASK 21-26-41-000-002).

4. Procedure
Subtask 26-15-00-100-050-A

A. Cleaning of the Piccolo Tubes

WARNING: WHEN YOU USE COMPRESSED AIR:

USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.

LOOSE PARTICLES AND/OR HIGH PRESSURE AIR CAN CAUSE INJURY.

(1) Make sure that the output tubes have no blockage. If necessary clean the output tubes with compressed air.
(2) Use an AIR SOURCE 0.3 TO 0.7 BAR (5 TO 10 PSI)- FILTERED, DRY to clean the piccolo tubes.
(3) Make sure that the piccolo tubes are in the correct condition and that there is no unwanted material in the duct.

5. Close-up
Subtask 26-15-00-420-050-A

A. Installation of the Duct
(1) Install the duct (Ref. AMM TASK 21-26-41-400-002).
(2) Install the avionics compartment smoke detector (Ref. AMM TASK 26-15-15-400-001).

Subtask 26-15-00-710-052-A

B. Operational Test
(1) Do the operational test of the avionics smoke detection system from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 26-15-00-710-001).

Subtask 26-15-00-410-051-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

Subtask 26-15-00-862-052-A

D. De-energize the ground service network (Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:43:45 UTC