Metal Chip contamination on Magnetic Drain Plug or Speed Sensors (APS 3200)

TASK 49-00-00-810-946-A
Metal Chip contamination on Magnetic Drain Plug or Speed Sensors (APS 3200)

1. Possible Causes

APU (internal wear)
APU (front bearing failure)

2. Job Set-up Information
A. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
No specific	lint-free cloth

B. Referenced Information

REFERENCE	DESIGNATION
AMM 49-00-00-860-005	APU Start by External Power
AMM 49-00-00-860-006	APU Shutdown by External Power
AMM 49-11-11-000-003	Removal of the Power Plant (APU) (APS 3200)
AMM 49-11-11-400-003	Installation of the Power Plant (APU) (APS 3200)
AMM 49-71-13-000-002	Removal of the Speed Sensor (APS 3200)
AMM 49-71-13-400-002	Installation of the Speed Sensor (APS 3200)
AMM 49-90-00-600-005	Oil Change (Drain Procedure) (APS 3200)
AMM 49-91-41-920-001	Discard Pressure Oil Filter Element (APS 3200)
AMM 49-91-41-920-002	Replace AC-Generator Scavenge Filter-Element (APS 3200)
AMM 49-91-42-000-002	Removal of the Magnetic Drain Plug (APS 3200)
AMM 49-91-42-400-002	Installation of the Magnetic Drain Plug (APS 3200)

3. Fault Confirmation
Subtask 49-00-00-710-318-A ** ON A/C NOT FOR ALL

A. Not applicable.

4. Fault Isolation
Subtask 49-00-00-810-303-A ** ON A/C NOT FOR ALL

A. Maintenance Action for Magnetic Drain Plug metal chip contamination
(1) If you find a small quantity of metal particles not larger than 1.50 mm (0.0591 in.) in any shape:

in this permitted case install the magnetic element in the drain plug AMM 49-91-42-400-002.

(2) If you find a large quantity of metal particles smaller than 1.50 mm (0.0591 in.) , do the following steps:

WARNING: OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.

WARNING: MAKE SURE THAT THERE IS A GOOD FLOW OF AIR THROUGH THE WORK AREA WHEN YOU USE SPECIAL MATERIALS. IF YOU GET ONE OF THESE MATERIALS ON YOUR SKIN, IN YOUR MOUTH OR IN YOUR EYES:

FLUSH IT AWAY WITH A FLOW OF CLEAN WATER FOR BETWEEN 10 AND 15 MINUTES.
GET IMMEDIATE MEDICAL AID IF IRRITATION OCCURS.

DO NOT BREATHE THE FUMES FROM THE MATERIAL. DO NOT SMOKE WHEN YOU USE THE MATERIAL. DO NOT USE THE MATERIAL NEAR A FLAME, SPARKS OR SOURCES OF HEAT. THESE MATERIALS ARE DANGEROUS: THEY ARE POISONOUS, FLAMMABLE AND SKIN IRRITANTS.

CAUTION: DO NOT CLEAN THE OIL FILTER ELEMENTS. YOU MUST DISCARD THEM AND INSTALL NEW FILTER ELEMENTS. IF YOU CLEAN THE OIL FILTER ELEMENTS, YOU CAN CAUSE DAMAGE TO THEM. THIS WILL CAUSE DAMAGE TO THE APU.

(a) Clean the magnetic element in the Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(b) Dry the magnetic element with a clean, lint-free cloth.
(c) Replace the oil filters AMM 49-91-41-920-002 and AMM 49-91-41-920-001.
(d) Install the magnetic element AMM 49-91-42-400-002.
(e) Do the servicing to change the oil in the APU oil reservoir AMM 49-90-00-600-005.
(f) Start the APU AMM 49-00-00-860-005 and operate it for 15 minutes.
(g) Do the APU shutdown procedure AMM 49-00-00-860-006.
(h) Remove the magnetic element AMM 49-91-42-000-002.
(i) Remove the oil filters for inspection AMM 49-91-41-920-001 and AMM 49-91-41-920-002.
(j) Inspect the magnetic element and the oil filter elements under a source of white light for metal particles.

if you find any metal particles on the magnetic element or the oil filter elements:

1 Replace the APU (internal wear) AMM 49-11-11-000-003 and AMM 49-11-11-400-003
(3) If you find metal particles larger than 1.50 mm (0.0591 in.):

replace the APU (internal wear) AMM 49-11-11-000-003 and AMM 49-11-11-400-003.

Subtask 49-00-00-810-304-B ** ON A/C NOT FOR ALL

B. Maintenance Action for Speed Sensor(s) metal chip contamination
(1) If you find a small quantity of metal particles do the following steps:

WARNING: OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.

WARNING: MAKE SURE THAT THERE IS A GOOD FLOW OF AIR THROUGH THE WORK AREA WHEN YOU USE SPECIAL MATERIALS. IF YOU GET ONE OF THESE MATERIALS ON YOUR SKIN, IN YOUR MOUTH OR IN YOUR EYES:

FLUSH IT AWAY WITH A FLOW OF CLEAN WATER FOR BETWEEN 10 AND 15 MINUTES.
GET IMMEDIATE MEDICAL AID IF IRRITATION OCCURS.

(a) Clean the speed sensor(s) (8060KM1), (8060KM2) in the Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(b) Dry the speed sensor(s) (8060KM1), (8060KM2) with a clean, lint-free cloth.
(c) Install the speed sensor(s) (8060KM1), (8060KM2) AMM 49-71-13-400-002.
(d) Start the APU AMM 49-00-00-860-005 and operate it for 15 minutes.
(e) Do the APU shutdown procedure AMM 49-00-00-860-006.
(f) Remove the speed sensor(s) (8060KM1), (8060KM2) AMM 49-71-13-000-002.
(g) Inspect the speed sensor(s) under a source of white light for metal particles and if you find any metal particles on the speed sensor(s):
1 Replace the APU (front bearing failure) AMM 49-11-11-000-003 and AMM 49-11-11-400-003.
(2) If you find a large quantity of metal particles:

replace the APU (front bearing failure) AMM 49-11-11-000-003 and AMM 49-11-11-400-003.

[Rev.8 from Aug 2018] 2026.04.04 04:34:27 UTC