DOC AIRBUS | AMM A320FPreservation of Engine Parts [CFML]
TASK 70-80-00-910-809-A
Preservation of Engine Parts
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 70-80-00-910-059-A
Subtask 70-80-00-910-057-A
[Rev.10 from 2021]
2026.04.01 02:21:10 UTC
Preservation of Engine Parts
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | BAG - PLASTIC |
| No specific | 1 | CONTAINER - CLEAN, APPLICABLE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2442) | engine oil |
| (Material No.CP5082) | preservative fingerprint neutralizer |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 72-00-00-620-803-A | Preservation of an Engine for a Period up to 10 days |
| TASK 72-00-00-620-804-A | Preservation of an Engine for a Period up to 30 days |
| TASK 72-00-00-620-805-A | Preservation of an Engine for a Period up to 90 days |
Subtask 70-80-00-910-059-A
A. General
(1) Engine parts made of non corrosion-resistant materials should be protected if they are permitted to stand for more than a few minutes. Examples of non corrosion-resistant materials include chromoloy, alloys of aluminum, magnesium and copper, and corrosion-resistant alloys that have been nitrided or malcolmized. Parts containing dissimilar metals are also subject to corrosion. This practice does not apply to assembled engines, bearings, electrical parts or accessories.
4. Procedure(1) Engine parts made of non corrosion-resistant materials should be protected if they are permitted to stand for more than a few minutes. Examples of non corrosion-resistant materials include chromoloy, alloys of aluminum, magnesium and copper, and corrosion-resistant alloys that have been nitrided or malcolmized. Parts containing dissimilar metals are also subject to corrosion. This practice does not apply to assembled engines, bearings, electrical parts or accessories.
Subtask 70-80-00-910-057-A
A. Protection of Parts in Process
(1) Non corrosion-resistant materials should be preserved during the overhaul process of inspection and repair by one of the following procedures. If a preserved part is handled before expiration of the preservation period, or if the preservation period expires, the part must be reprocessed at once.
Subtask 70-80-00-620-050-A Subtask 70-80-00-620-051-A Subtask 70-80-00-620-052-A Subtask 70-80-00-910-058-A (1) Non corrosion-resistant materials should be preserved during the overhaul process of inspection and repair by one of the following procedures. If a preserved part is handled before expiration of the preservation period, or if the preservation period expires, the part must be reprocessed at once.
E. Protection of Parts for Storage
(1) The following instructions apply to the protection of parts that are to be stored for extended periods.
(a) Painted Surfaces
1 In general, painted surfaces do not require protection beyond a simple dust cover. If the paint is chipped or missing in spots, it should be touched-up before the part is stored.
(b) Plated Surfaces
1 In general, plated surfaces require no protection other than a dust cover. Silver-plated parts must be wrapped in anti-tarnish paper and stored in sulfide-free containers.
(c) Uncoated Surfaces
1 Metallic surfaces that are not normally coated or plated are most susceptible to corrosion. Iron and steel alloys are usually considered the most vulnerable. Stainless steels such as 321 and A286 do not require protection; however, the 400-series of stainless steels does require it. Brass and bronze should be protected. Process parts as follows.
a Apply a coat of preservative fingerprint neutralizer (Material No.CP5082) to the part by dipping, brushing or spraying.
b Place the part in a BAG - PLASTIC or other vapor-proof CONTAINER - CLEAN, APPLICABLE to protect it from dust, dirt, and moisture, or wrap in paper if size requires it.
(2) Parts with Cavities
(a) Parts that have cavities subject to corrosion or rusting should be filled with engine oil (Material No.CP2442) , then drained thoroughly, to protect the internal surfaces. Plug or cover all openings and ports to prepare for storage.
(1) The following instructions apply to the protection of parts that are to be stored for extended periods.
(a) Painted Surfaces
1 In general, painted surfaces do not require protection beyond a simple dust cover. If the paint is chipped or missing in spots, it should be touched-up before the part is stored.
(b) Plated Surfaces
1 In general, plated surfaces require no protection other than a dust cover. Silver-plated parts must be wrapped in anti-tarnish paper and stored in sulfide-free containers.
(c) Uncoated Surfaces
1 Metallic surfaces that are not normally coated or plated are most susceptible to corrosion. Iron and steel alloys are usually considered the most vulnerable. Stainless steels such as 321 and A286 do not require protection; however, the 400-series of stainless steels does require it. Brass and bronze should be protected. Process parts as follows.
a Apply a coat of preservative fingerprint neutralizer (Material No.CP5082) to the part by dipping, brushing or spraying.
b Place the part in a BAG - PLASTIC or other vapor-proof CONTAINER - CLEAN, APPLICABLE to protect it from dust, dirt, and moisture, or wrap in paper if size requires it.
(2) Parts with Cavities
(a) Parts that have cavities subject to corrosion or rusting should be filled with engine oil (Material No.CP2442) , then drained thoroughly, to protect the internal surfaces. Plug or cover all openings and ports to prepare for storage.