DOC AIRBUS | AMM A320FInstallation of the Aft Engine Mount [CFMI]
TASK 71-22-11-400-040-A
Installation of the Aft Engine Mount
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 71-22-11-020-059-A ** ON A/C NOT FOR ALL 4. Procedure
Subtask 71-22-11-110-058-A ** ON A/C NOT FOR ALL Subtask 71-22-11-420-052-A ** ON A/C NOT FOR ALL
Subtask 71-22-11-410-055-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:22:52 UTC
Installation of the Aft Engine Mount
CAUTION:
THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | Torque wrench: range to between 38.58 and 35 lbf.ft (5.23 and 4.75 m.daN )  | |
| No specific | Torque wrench: range to between 88.2 and 80 lbf.ft (11.96 and 10.85 m.daN ) | |
| No specific | Torque wrench: range to between 27 and 24 lbf.in (0.31 and 0.27 m.daN ) | |
| RSE1098 | 1 | WRENCH SET - AFT ENGINE MOUNT |
| RSE1224 | 2 | SPLINT-ENGINE MOUNT AFT |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP5063) | silicone lubricant |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-21-11-911-001-A | Tightening Torques for Standard Threaded Fasteners |
| TASK 71-00-00-400-040-A | Installation of the Power Plant |
| TASK 71-00-00-400-040-A-01 | Installation of the Power Plant with the Engine Positioner TWW 75E |
| TASK 71-00-00-400-040-A-03 | Installation of the Power Plant with Jacxson Tool |
Aft Engine MountSubtask 71-22-11-020-059-A ** ON A/C NOT FOR ALL 4. Procedure
Subtask 71-22-11-110-058-A ** ON A/C NOT FOR ALL Subtask 71-22-11-420-052-A ** ON A/C NOT FOR ALL
B. Installation of the aft Engine Mount.
(2) Put engine aft mount (80) on engine and engage link assemblies with engine flanges.
(3) Apply silicone lubricant (Material No.CP5063) to the outer surfaces of the shear pin (45) and to the threads of the shear bolt (50). Install shear pin (45), anti-rotation bracket (60), and bracket (75) to engine mount (80) and engine flange.
(4) Put shear bolt (50) into shear pin (45).
. Use RSE1098 WRENCH SET - AFT ENGINE MOUNT (RSE1098-5) to adapt torque wrench to spanner nut (40).
. Use RSE1098 WRENCH SET - AFT ENGINE MOUNT (RSE1098-1) to adapt torque wrench to spanner nut (35).
(8) If holes in the anti-rotation bracket (60) do not line up with holes in brackets (25) and (30), increase torque on nuts (35) and (40) as necessary to line up the holes. Do not TORQUE nut (40) more than 95 lbf.ft (12.88 m.daN) or nut (35) more than 42 lbf.ft (5.69 m.daN).
(9) TORQUE nuts (20) to between 27 and 24 lbf.in (0.31 and 0.27 m.daN ).
(10) Install retaining pin (85) through shear pin (45).
5. Close-upCAUTION:
INSTALL THE BUSHING (65) WITH ITS SHOULDER AT THE INTERIOR OF THE ENGINE RANGE.
(1) Put bushing (55), shoulder bushing (65), and bushing (70) on engine. (2) Put engine aft mount (80) on engine and engage link assemblies with engine flanges.
(3) Apply silicone lubricant (Material No.CP5063) to the outer surfaces of the shear pin (45) and to the threads of the shear bolt (50). Install shear pin (45), anti-rotation bracket (60), and bracket (75) to engine mount (80) and engine flange.
(4) Put shear bolt (50) into shear pin (45).
CAUTION:
USE OF THE SPANNER WRENCHES AS A TORQUE WRENCH ADAPTER WILL CHANGE THE TORQUE VALUE WHICH IS REALLY APPLIED. THE EFFECTIVE LENGTH OF THE SPANNER WRENCHES ARE:
RSE1098-1 : 6-INCHES (152.4 MM)
RSE1098-5 : 8-INCHES (203.2 MM)
CAUTION:
MAKE SURE THE ANTI ROTATION BRACKET IS CENTERED AND DOES NOT TOUCH THE LINK. THE BRACKET CAN TOUCH THE LINK. IF THE BRACKET TOUCHES THE LINK IT CAN DAMAGE THE LINK
(5) Install slotted spanner. NOTE: To find the correct TORQUE value when spanner wrenches are used refer to the formula in standard practices (Ref. AMM TASK 20-21-11-911-001).
(a) Install slotted spanner nuts (40) on shear pin (45). TORQUE nut (40) to between 88.2 and 80 lbf.ft (11.96 and 10.85 m.daN ) . Use RSE1098 WRENCH SET - AFT ENGINE MOUNT (RSE1098-5) to adapt torque wrench to spanner nut (40). NOTE: Install the nut (40) with the counter bore side facing the shear pin (45).
(6) Install slotted spanner nut (35) on shear bolt (50). TORQUE nut (35) to between 38.58 and 35 lbf.ft (5.23 and 4.75 m.daN ) . Use RSE1098 WRENCH SET - AFT ENGINE MOUNT (RSE1098-1) to adapt torque wrench to spanner nut (35). NOTE: It is preferred that the flat side of the nut (35) face forward.
(7) Install outer retainers (25) and (30) on bracket (60) with washers (10) below bolts (5) and washers (15) below nuts (20). (8) If holes in the anti-rotation bracket (60) do not line up with holes in brackets (25) and (30), increase torque on nuts (35) and (40) as necessary to line up the holes. Do not TORQUE nut (40) more than 95 lbf.ft (12.88 m.daN) or nut (35) more than 42 lbf.ft (5.69 m.daN).
(9) TORQUE nuts (20) to between 27 and 24 lbf.in (0.31 and 0.27 m.daN )
. (10) Install retaining pin (85) through shear pin (45).
Subtask 71-22-11-410-055-A ** ON A/C NOT FOR ALL