DOC AIRBUS | AMM A320FStandard Precautions for Maintenance Procedures [PW11]
TASK 70-10-00-910-801-A
Standard Precautions for Maintenance Procedures
1. Reason for the Job
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 70-10-00-860-050-A ** ON A/C NOT FOR ALL
Subtask 70-10-00-910-050-A ** ON A/C NOT FOR ALL
(2) Examine all the parts for indications of cracking, scoring, burning or other damage at the time of removal.
(a) Put a tag on any unserviceable parts for subsequent investigation and possible repair.
(3) Do not let dust, dirt, safety wire, safety cable, nuts, washers or other unwanted material (Foreign Object Damage (FOD)) go into the engine.
(4) Foreign objects
(a) If a part, tool or object falls into the engine, the assembly process must stop until the fallen articles are found. Before you assemble or install any part, make sure that it is fully clean.
(b) It is possible to find and remove a fallen object with a fiber optic scope. Attach a small plastic tube (approximately 0.375 in. (9.52 mm) and 0.500 in. (12.70 mm) diameter) to the side of the fiber optic scope with Masking Tape (Material No.P05-255) at several locations. Make sure that the end of the tube is aligned with the end of the fiber optic scope and that it does not prevent the movement of the scope. Attach other end of the plastic tube to a VACUUM CLEANER hose. Hold the object for removal by the suction of the plastic tube.
(c) If the above equipment is not available, it is possible to use a MAGNET to remove objects if they are magnetic. Attach the MAGNET to a flexible cable with Masking Tape (Material No.P05-255) so that it is possible to move it across a larger area. You can also use Double Sided Adhesive Tape (Material No.P05-012) attached to the end of a flexible cable.
(5) Do not use safety wire, lockwashers, tablocks, key washers (tab type) or cotter pins again after they are removed. All safety wire and cotter pins must have a tight fit in their holes. Refer to Installation of Safety Wire (Ref. AMM TASK 70-24-00-910-811), (Ref. AMM TASK 70-24-00-910-813), Installation of Key Washers (Ref. AMM TASK 70-24-00-910-807), and Installation of Cotter Pins (Ref. AMM TASK 70-24-00-910-809).
14QEB1 Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(6) Discard all gaskets, packings and rubber parts at each removal. Replace all gaskets, packings and rubber parts with new ones at each installation. Make sure that the new non-metal parts (such as oil seals) show no signs of deterioration from storage. Refer to Installation of Installation of Packing and Seals (Ref. AMM TASK 70-24-00-910-808).
(7) If necessary, apply the applicable gasket lubricant to the gasket surfaces to prevent a bond of the gasket to the surfaces of the mating part as specified in the installation task.
(9) If parts have a layer of corrosion preventive compounds, remove all of this compound and all other unwanted material before installation.
(10) For bolts, brackets, nuts and nut plates that are treated with molybdenum disulfide type dry film lubricants, such as Antigallant Compound (Material No.P06-038) , it is possible that the parts may show yellowish-white residue after a thermal exposure. This occurs because the molybdenum disulfide lubricant in the antigallant oxidizes to a molybdenum trioxide compound. The molybdenum trioxide is not harmful to the structural integrity or functionality of the parts. Pratt & Whitney laboratory analysis has also demonstrated that this compound is not corrosive.
[Rev.10 from 2021]
2026.04.02 06:31:41 UTC
Standard Precautions for Maintenance Procedures
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - BLANKING |
| No specific | 1 | MAGNET |
| No specific | AR | PLUG - BLANKING |
| No specific | 1 | VACUUM CLEANER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P05-012) | Double Sided Adhesive Tape |
| (Material No.P05-255) | Masking Tape |
| (Material No.P06-038) | Antigallant Compound |
| (Material No.14QEB1) | Wire-Locking Dia: 0.6 mm CRES Nickel Alloy - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-24-00-910-807-A | PWA 318 - Key Washer (Tab-Type) Installation |
| TASK 70-24-00-910-808-A | Installation of the Packings and Seals |
| TASK 70-24-00-910-809-A | PWA 316 - Cotter Pin Installation |
| TASK 70-24-00-910-811-A | Assembly - PWA 316 - Safety Wire (Lockwire) Installation |
| TASK 70-24-00-910-813-A | Assembly - PWA 316 - Safety Cable Installation |
Subtask 70-10-00-860-050-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 70-10-00-910-050-A ** ON A/C NOT FOR ALL
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
A. General Instructions for Removal of Parts NOTE: Always obey the specific procedures and limits in the specific AMM maintenance tasks.
(1) Put tags and marks on all the parts with their engine locations at the time of removal. This makes sure that the subsequent installation will be correct. (2) Examine all the parts for indications of cracking, scoring, burning or other damage at the time of removal.
(a) Put a tag on any unserviceable parts for subsequent investigation and possible repair.
(3) Do not let dust, dirt, safety wire, safety cable, nuts, washers or other unwanted material (Foreign Object Damage (FOD)) go into the engine.
CAUTION:
WHEN DUST CAPS ARE USED FOR THE PROTECTION OF OPEN LINES AGAINST CONTAMINATION, ALWAYS BE SURE TO INSTALL THE CAPS AROUND THE TUBE ENDS AND NOT IN THE TUBE ENDS. THERE CAN BE BLOCKAGE OF THE FLOW THROUGH THE TUBES IF THESE TUBES ARE INSTALLED ACCIDENTALLY WITH DUST CAPS IN THE TUBE ENDS.
CAUTION:
DO NOT PUT TOOLS, FASTENERS, OR OTHER SMALL OBJECTS IN THE AREA BETWEEN THE INNER FAN-EXIT-CASE STRUTS. THESE OBJECTS CAN FALL THROUGH THE BLEED VALVE PORTS, INTO THE ENGINE, AND CAUSE DAMAGE.
(a) Put the applicable PLUG - BLANKING, CAP - BLANKING and other covers on all the openings as soon as possible during the disassembly process to prevent contamination. (4) Foreign objects
(a) If a part, tool or object falls into the engine, the assembly process must stop until the fallen articles are found. Before you assemble or install any part, make sure that it is fully clean.
(b) It is possible to find and remove a fallen object with a fiber optic scope. Attach a small plastic tube (approximately 0.375 in. (9.52 mm) and 0.500 in. (12.70 mm) diameter) to the side of the fiber optic scope with Masking Tape (Material No.P05-255) at several locations. Make sure that the end of the tube is aligned with the end of the fiber optic scope and that it does not prevent the movement of the scope. Attach other end of the plastic tube to a VACUUM CLEANER hose. Hold the object for removal by the suction of the plastic tube.
(c) If the above equipment is not available, it is possible to use a MAGNET to remove objects if they are magnetic. Attach the MAGNET to a flexible cable with Masking Tape (Material No.P05-255) so that it is possible to move it across a larger area. You can also use Double Sided Adhesive Tape (Material No.P05-012) attached to the end of a flexible cable.
(5) Do not use safety wire, lockwashers, tablocks, key washers (tab type) or cotter pins again after they are removed. All safety wire and cotter pins must have a tight fit in their holes. Refer to Installation of Safety Wire (Ref. AMM TASK 70-24-00-910-811), (Ref. AMM TASK 70-24-00-910-813), Installation of Key Washers (Ref. AMM TASK 70-24-00-910-807), and Installation of Cotter Pins (Ref. AMM TASK 70-24-00-910-809).
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
(a) Safety the bushing plugs with (6) Discard all gaskets, packings and rubber parts at each removal. Replace all gaskets, packings and rubber parts with new ones at each installation. Make sure that the new non-metal parts (such as oil seals) show no signs of deterioration from storage. Refer to Installation of Installation of Packing and Seals (Ref. AMM TASK 70-24-00-910-808).
(7) If necessary, apply the applicable gasket lubricant to the gasket surfaces to prevent a bond of the gasket to the surfaces of the mating part as specified in the installation task.
CAUTION:
BEFORE YOU USE TOOLS WITH A LAYER OF PROTECTIVE MATERIAL, MAKE SURE THAT THERE IS SUFFICIENT PROTECTIVE MATERIAL TO PREVENT DAMAGE TO ENGINE PARTS.
(8) To give protection to the critical areas of engine parts (such as compressor and turbine disks) against scratches and nicks, tool surfaces which touch these areas must have a protective material cover. (9) If parts have a layer of corrosion preventive compounds, remove all of this compound and all other unwanted material before installation.
(10) For bolts, brackets, nuts and nut plates that are treated with molybdenum disulfide type dry film lubricants, such as Antigallant Compound (Material No.P06-038) , it is possible that the parts may show yellowish-white residue after a thermal exposure. This occurs because the molybdenum disulfide lubricant in the antigallant oxidizes to a molybdenum trioxide compound. The molybdenum trioxide is not harmful to the structural integrity or functionality of the parts. Pratt & Whitney laboratory analysis has also demonstrated that this compound is not corrosive.