DOC AIRBUS | AMM A320FInstallation of the Aft Engine Mount without Engine Removal [CFMI]
TASK 71-22-11-400-042-A
Installation of the Aft Engine Mount without Engine Removal
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 71-22-11-860-053-A ** ON A/C NOT FOR ALL
Subtask 71-22-11-210-055-A ** ON A/C NOT FOR ALL
Subtask 71-22-11-080-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:22:54 UTC
Installation of the Aft Engine Mount without Engine Removal
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
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 | AR | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | MAGNIFYING GLASS POWER 10X |
| No specific | AR | WARNING NOTICE(S) |
| 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 42 and 35 lbf.ft (5.69 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 95 and 80 lbf.ft (12.88 and 10.85 m.daN ) | |
| No specific | Torque wrench: range to between 580 and 480 lbf.ft (78.64 and 65.08 m.daN ) | |
| No specific | Torque wrench: range to between 27 and 23 lbf.in (0.31 and 0.26 m.daN ) | |
| No specific | Torque wrench: range to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ) | |
| No specific | Torque wrench: range to between 9.63 and 8.95 m.daN (71.02 and 66.00 lbf.ft ) | |
| No specific | Torque wrench: range to between 12.88 and 10.85 m.daN (94.99 and 80.01 lbf.ft ) | |
| 98D27803500001 | 1 | LOCKING TOOL ZERO POS |
| 98D71203004000 | 1 | WRENCH-REM INST ROD |
| RSE1224 | 2 | SPLINT-ENGINE MOUNT AFT |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP5063) | silicone lubricant |
| (Material No.CP8006) | safety cable 0.032 in. (0.8 mm) dia. |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 81 | LOCK NUT | AIPC 71-22-11-01-080 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-21-11-911-001-A | Tightening Torques for Standard Threaded Fasteners |
| TASK 71-13-00-010-040-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-A | Closing of the Fan Cowl Doors |
| TASK 78-30-00-081-041-A | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-A | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-A | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-A | Closing of the Thrust Reverser Doors |
Bootstrap InstallationSubtask 71-22-11-860-053-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the slats are retracted and install 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
Subtask 71-22-11-010-060-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
(4) Make sure that the slats are retracted and install 98D27803500001 LOCKING TOOL ZERO POS on the flap and slat control lever.
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Make sure that the thrust reverser doors are open to the 45-degrees position (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 71-22-11-040-054-A ** ON A/C NOT FOR ALL Subtask 71-22-11-020-060-A ** ON A/C NOT FOR ALL 4. Procedure(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Make sure that the thrust reverser doors are open to the 45-degrees position (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
Subtask 71-22-11-210-055-A ** ON A/C NOT FOR ALL
A. Checks Before Installation
Subtask 71-22-11-110-052-A ** ON A/C NOT FOR ALL CAUTION:
DO A DETAILED VISUAL INSPECTION OF THE AFT MOUNT RETAINING PINS AND RETAINERS TO MAKE SURE THAT THEIR CONDITION IS CORRECT.
(1) Check aft engine mount for condition and security B. Cleaning
(1) Clean the pins (45), (130), bolts (50), (120), bolts (155) and nuts (170) with isopropyl alcohol (Material No.CP1041) .
Subtask 71-22-11-210-056-A ** ON A/C NOT FOR ALL (1) Clean the pins (45), (130), bolts (50), (120), bolts (155) and nuts (170) with isopropyl alcohol (Material No.CP1041) .
C. Make sure that there are no traces of excessive seizure or wear.
Subtask 71-22-11-230-050-A ** ON A/C NOT FOR ALL D. Do a fluorescent penetrant inspection level 3 of the mount bolts. No cracks are permitted. (Ref. CFMI Standard Practices Manual 70-32-13, 70-32-23).
(1) Do a visual inspection of the barrel nuts (170) with a MAGNIFYING GLASS POWER 10X. Carefully examine the thread root area of the last two threads. No cracks are permitted. If cracks are found notify Rohr Inc.
Subtask 71-22-11-869-052-A ** ON A/C NOT FOR ALL (1) Do a visual inspection of the barrel nuts (170) with a MAGNIFYING GLASS POWER 10X. Carefully examine the thread root area of the last two threads. No cracks are permitted. If cracks are found notify Rohr Inc.
E. Do a check of the running torque of the aft mount bolts as follows:
(1) Hand install bolts on barrel nuts until the bolts become hard to turn.
(2) With a torque wrench, screw bolt into barrel nut. Two threads must come out of the bottom of the barrel nut. The running torque must be 90 lbf.in (1.02 m.daN) minimum, 800 lbf.in (9.04 m.daN) maximum.
(3) Allow bolt and barrel nut cool for one minute.
(4) Use a torque wrench to loosen bolt from barrel nut. The break away torque must be 90 lbf.in (1.02 m.daN) minimum, 800 lbf.in (9.04 m.daN) maximum.
(5) If the barrel nut does not keep the correct running torque, replace the barrel nut and do again steps (1) through (4).
Subtask 71-22-11-110-053-A ** ON A/C NOT FOR ALL (1) Hand install bolts on barrel nuts until the bolts become hard to turn.
(2) With a torque wrench, screw bolt into barrel nut. Two threads must come out of the bottom of the barrel nut. The running torque must be 90 lbf.in (1.02 m.daN) minimum, 800 lbf.in (9.04 m.daN) maximum.
(3) Allow bolt and barrel nut cool for one minute.
(4) Use a torque wrench to loosen bolt from barrel nut. The break away torque must be 90 lbf.in (1.02 m.daN) minimum, 800 lbf.in (9.04 m.daN) maximum.
(5) If the barrel nut does not keep the correct running torque, replace the barrel nut and do again steps (1) through (4).
F. Thoroughly clean the mating faces, the shear or locating pin holes and the fastener holes.
Subtask 71-22-11-420-056-A ** ON A/C NOT FOR ALL G. Installation of the Aft Engine Mount
(1) Apply silicone lubricant (Material No.CP5063) on the bolts (50), (120) and (155) threads, the outer surfaces of the pins (45), (130), the washers (160), the nuts (170) and the pin holes.
(2) Put the center link in its installation position, on the engine case.
(3) Put the cross beam between the engine and the pylon and let it on the engine case.
(4) Position the lateral links (430) on the engine.
(5) Install the pins into the lateral link ends, turbine case side:
(b) Install the shear pin (45), anti-rotation bracket (60) and bracket (75) on the engine flange.
(c) Put the shear bolt (50) into the shear pin (45).
(6) Lift the cross beam:
(a) Lift the cross beam parallel to the pylon attach fitting, and engage the alignment pins (400).
(7) Install the pin into the center link end, turbine case side:
(b) Install the shear pin (45), anti-rotation bracket (60) and bracket (75) on the engine flange.
(c) Put the shear bolt (50) into the shear pin (45).
(8) Install the pin into the center link end, cross beam side:
(a) Install the anti-rotation brackets (140), pins (130), bolts (120) and retaining pins (110).
(9) Lift the engine with the hoist and apply a 400 daN (900 lbf) force.
(10) Install the aft engine mount (165) on the pylon:
(b) Installation of the washers:
(c) Put the bolts (155) through the holes in the pylon and the aft engine mount (165).
(d) Install the bolts (155) into the barrel nuts (170).
(e) TORQUE the bolts (155) to between 580 and 480 lbf.ft (78.64 and 65.08 m.daN ). Make sure the mating surface of the aft engine mount (165) touches the pylon after you torque the bolts (155).
(f) Installation of the safety cable:
CP8006 safety cable 0.032 in. (0.8 mm) dia.
(11) Torque and safety the pins of the three link ends, turbine case side:
. Use a 98D71203004000 WRENCH-REM INST ROD to adapt the torque wrench to the spanner nut (40). Install the nut (40) with the counterbored side turned to the shear pin (45).
(b) Install the slotted spanner nut (35) on the shear bolt (50). TORQUE the 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 the torque wrench to the spanner nut (35).
(d) Install the outer retainers (25) and (30) on the bracket (60) with the washers (10) below the bolts (5), and the washers (15) below the nuts (20).
(e) If the holes in the anti-rotation bracket (60) do not line up with the holes in the brackets (25) and (30), increase the torque on the nuts (35) and (40) as necessary to line up the holes. Do not TORQUE the nut (40) more than 95 lbf.ft (12.88 m.daN) or the nut (35) more than 42 lbf.ft (5.69 m.daN).
(f) TORQUE the nuts (20) to between 27 and 23 lbf.in (0.31 and 0.26 m.daN ).
(g) Install the retaining pin (85) through the shear pin (45).
PRE SB RA32071-164 and SB RA32071-174
(12) TORQUE and safety the pins of the three links, cross beam side:
(a) Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
(b) Install the pin (120) into the pin (130), and install the retainer pin (110).
(c) Install the inner retainer (100) and the nut (90).
(d) TORQUE the nut (90) to the minimum value to between 95 and 80 lbf.ft (12.88 and 10.85 m.daN ). Increase the value as necessary to align the nut with the anti-rotation retainer (100), when the retainer is installed.
(e) Temporarily install the anti-rotation retainer (70) and record the position necessary for the alignment of the nut. Then, increase the torque on the nut (90) as necessary (do not torque the nut to more than the maximum torque value) to align the nut with the retainer (70).
(f) Install the nut (80).
(g) TORQUE the nut (80) to the minimum value to between 42 and 35 lbf.ft (5.69 and 4.75 m.daN ). Then, increase the value as necessary to align the nut with the anti-rotation retainer (70), when the retainer is installed.
(h) Temporarily install the anti-rotation retainer (60) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (80) as necessary (do not torque the nut to more than the maximum torque value) to align the nut with the retainer (60).
(i) Apply silicone lubricant (Material No.CP5063) on the threads of the bolts (20).
(j) Install the outer retainers (60) and (70) on the nuts (80) and (90) with the bolts (20), washers (30) and (40) and nuts (50).
(k) TORQUE the nuts (50) to between 27 and 23 lbf.in (0.31 and 0.26 m.daN ).
END OF PRE SB RA32071-164 and SB RA32071-174
POST SB RA32071-164
(13) Torque and safety the pins of the three links and the cross beam side:
(a) Install the left hand link as follows:
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.99 and 80.01 lbf.ft ). Increase the value as necessary to align the nut with the anti-rotation retainer (100), when the retainer is installed.
6 Temporarily install the anti-rotation retainer (63) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (63).
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
. Increase the value as necessary to align the lock nut with the anti-rotation retainer (63) when the retainer is installed.
9 Temporarily install the anti-rotation retainer (73) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (73).
10 Apply silicone lubricant (Material No.CP5063) to the threads of bolts (20).
11 Install the outer retainers (63) and (73) on the lock nut (81) and nut (90) with bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ).
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.99 and 80.01 lbf.ft ). Increase the value as necessary to align the nuts with the anti-rotation retainer (105) when the retainer is installed.
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
. Increase the value as necessary to align the lock nut with the anti-rotation retainer (65), when the retainer is installed.
9 Temporarily install the anti-rotation retainer (75) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (65).
10 Apply silicone lubricant (Material No.CP5063) on the threads of bolts (20).
11 Install the outer retainers (65) and (75) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ).
END OF POST SB RA32071-164
POST SB RA32071-174
(14) Torque and safety pins of the three links and cross beam side:
(a) Install the left hand link as follows:
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.98 and 80.01 lbf.ft ). Increase the value as necessary to align the nuts with the anti-rotation retainer (104) when the retainer is installed.
6 Temporarily install the anti-rotation retainer (64) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (64).
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
. Increase the value as necessary to align the lock nut with the anti-rotation retainer (64) when the retainer is installed.
9 Temporarily install the anti-rotation retainer (74) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (74).
10 Apply silicone lubricant (Material No.CP5063) to the threads of the bolts (20).
11 Install the outer retainers (64) and (74) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ).
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.98 and 80.01 lbf.ft ). Increase the value as necessary to align the nuts with the anti-rotation retainer (106) when the retainer is installed.
6 Temporarily install the anti-rotation retainer (66) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (66).
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
. Increase the value as necessary to align the lock nut with the anti-rotation retainer (66), when the retainer is installed.
9 Temporarily install the anti-rotation retainer (76) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (66).
10 Apply silicone lubricant (Material No.CP5063) on the threads of the bolts (20).
11 Install the outer retainers (66) and (76) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ).
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.98 and 80.01 lbf.ft ). Increase the value as necessary to align the nuts with the anti-rotation retainer (107) when the retainer is installed.
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
. Increase the value as necessary to align the lock nut with the anti-rotation retainer (67), when the retainer is installed.
9 Temporarily install the anti-rotation retainer (77) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (67).
10 Apply silicone lubricant (Material No.CP5063) on the threads of bolts (20).
11 Install the outer retainers (67) and (77) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in ).
END OF POST SB RA32071-174
5. Close-up(1) Apply silicone lubricant (Material No.CP5063) on the bolts (50), (120) and (155) threads, the outer surfaces of the pins (45), (130), the washers (160), the nuts (170) and the pin holes.
(2) Put the center link in its installation position, on the engine case.
(3) Put the cross beam between the engine and the pylon and let it on the engine case.
(4) Position the lateral links (430) on the engine.
(5) Install the pins into the lateral link ends, turbine case side:
CAUTION:
INSTALL THE BUSHING (65) WITH ITS SHOULDER AT THE INTERIOR OF THE ENGINE RANGE.
(a) Install the bushing (55), shoulder bushing (65) and bushing (70) to the engine flange. (b) Install the shear pin (45), anti-rotation bracket (60) and bracket (75) on the engine flange.
(c) Put the shear bolt (50) into the shear pin (45).
(6) Lift the cross beam:
(a) Lift the cross beam parallel to the pylon attach fitting, and engage the alignment pins (400).
(7) Install the pin into the center link end, turbine case side:
CAUTION:
INSTALL THE BUSHING (65) WITH ITS SHOULDER AT THE INTERIOR OF THE ENGINE RANGE.
(a) Put the bushing (55), shoulder bushing (65) and bushing (70) on the link assembly (430) on the engine flange. (b) Install the shear pin (45), anti-rotation bracket (60) and bracket (75) on the engine flange.
(c) Put the shear bolt (50) into the shear pin (45).
(8) Install the pin into the center link end, cross beam side:
(a) Install the anti-rotation brackets (140), pins (130), bolts (120) and retaining pins (110).
(9) Lift the engine with the hoist and apply a 400 daN (900 lbf) force.
(10) Install the aft engine mount (165) on the pylon:
CAUTION:
INSTALL THE BARREL NUT WITH THE ROUNDED SIDE UP. IF NOT, DAMAGE TO THE BARREL NUT CAN OCCUR.
(a) Put the barrel nuts (170), with the rounded side up, and the retainers (175) in the aft engine mount (165). (b) Installation of the washers:
CAUTION:
THE INNER DIAMETER OF THE WASHER HAS A CHAMFER ON ONE SIDE ONLY. YOU MUST PUT THE CHAMFER AGAINST THE HEAD OF THE BOLT SO THAT IT AGREES WITH THE RADIUS OF THE HEAD OF THE BOLT. INCORRECT INSTALLATION OF THE WASHER CAN DAMAGE THE HEAD OF THE BOLT.
1 Put the washers (160) on the bolts (155) so the chamfer of the washer (160) agrees with the radius of the heads of the bolts (155). (c) Put the bolts (155) through the holes in the pylon and the aft engine mount (165).
(d) Install the bolts (155) into the barrel nuts (170).
(e) TORQUE the bolts (155) to between 580 and 480 lbf.ft (78.64 and 65.08 m.daN )
. Make sure the mating surface of the aft engine mount (165) touches the pylon after you torque the bolts (155). (f) Installation of the safety cable:
CAUTION:
SAFETY WIRE CAN CAUSE DAMAGE TO THE PYLON. USE SAFETY CABLE TO SAFETY THE BOLTS.
1 Safety the bolts (155) with (11) Torque and safety the pins of the three link ends, turbine case side:
CAUTION:
USE OF THE SPANNER WRENCHES AS A TORQUE WRENCH ADAPTOR WILL CHANGE THE TORQUE VALUE WHICH IS REALLY APPLIED.
(a) Install the slotted spanner: NOTE: To find the correct TORQUE value when the spanner wrenches are used, refer to the formula in the standard practices (Ref. AMM TASK 20-21-11-911-001).
1 Install the slotted spanner nuts (40) on the shear pin (45). TORQUE the nut (40) to between 88.2 and 80 lbf.ft (11.96 and 10.85 m.daN ) . Use a 98D71203004000 WRENCH-REM INST ROD to adapt the torque wrench to the spanner nut (40). Install the nut (40) with the counterbored side turned to the shear pin (45).(b) Install the slotted spanner nut (35) on the shear bolt (50). TORQUE the 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 the torque wrench to the spanner nut (35). NOTE: It is recommended that you position the flat side of the nut (35) forward.
(c) Apply silicone lubricant (Material No.CP5063) on the threads of bolts (5).(d) Install the outer retainers (25) and (30) on the bracket (60) with the washers (10) below the bolts (5), and the washers (15) below the nuts (20).
(e) If the holes in the anti-rotation bracket (60) do not line up with the holes in the brackets (25) and (30), increase the torque on the nuts (35) and (40) as necessary to line up the holes. Do not TORQUE the nut (40) more than 95 lbf.ft (12.88 m.daN) or the nut (35) more than 42 lbf.ft (5.69 m.daN).
(f) TORQUE the nuts (20) to between 27 and 23 lbf.in (0.31 and 0.26 m.daN )
. (g) Install the retaining pin (85) through the shear pin (45).
PRE SB RA32071-164 and SB RA32071-174
(12) TORQUE and safety the pins of the three links, cross beam side:
(a) Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
(b) Install the pin (120) into the pin (130), and install the retainer pin (110).
(c) Install the inner retainer (100) and the nut (90).
(d) TORQUE the nut (90) to the minimum value to between 95 and 80 lbf.ft (12.88 and 10.85 m.daN )
. Increase the value as necessary to align the nut with the anti-rotation retainer (100), when the retainer is installed. (e) Temporarily install the anti-rotation retainer (70) and record the position necessary for the alignment of the nut. Then, increase the torque on the nut (90) as necessary (do not torque the nut to more than the maximum torque value) to align the nut with the retainer (70).
(f) Install the nut (80).
(g) TORQUE the nut (80) to the minimum value to between 42 and 35 lbf.ft (5.69 and 4.75 m.daN )
. Then, increase the value as necessary to align the nut with the anti-rotation retainer (70), when the retainer is installed.(h) Temporarily install the anti-rotation retainer (60) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (80) as necessary (do not torque the nut to more than the maximum torque value) to align the nut with the retainer (60).
(i) Apply silicone lubricant (Material No.CP5063) on the threads of the bolts (20).
(j) Install the outer retainers (60) and (70) on the nuts (80) and (90) with the bolts (20), washers (30) and (40) and nuts (50).
(k) TORQUE the nuts (50) to between 27 and 23 lbf.in (0.31 and 0.26 m.daN )
. NOTE: If you use the nuts (50) again, do a 2.0 lbf.in (0.02 m.daN) running torque check.
END OF PRE SB RA32071-164 and SB RA32071-174
POST SB RA32071-164
(13) Torque and safety the pins of the three links and the cross beam side:
(a) Install the left hand link as follows:
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
CAUTION:
MAKE SURE THAT THE RETAINER BRACKETS ARE INSTALLED WITH THE CORRECT ORIENTATION. IF THEY ARE NOT, DAMAGE TO THE HEATSHIELD CAN OCCUR.
4 Install the inner retainer (103) and nut (90). 5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.99 and 80.01 lbf.ft )
. Increase the value as necessary to align the nut with the anti-rotation retainer (100), when the retainer is installed. 6 Temporarily install the anti-rotation retainer (63) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (63).
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
NOTE: The lock nut (81) can only be used one time. If you removed the lock nut, discard it and replace it.
8 TORQUE the lock nut (81) to the minimum value to between 9.63 and 8.95 m.daN (71.02 and 66.00 lbf.ft ) . Increase the value as necessary to align the lock nut with the anti-rotation retainer (63) when the retainer is installed.9 Temporarily install the anti-rotation retainer (73) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (73).
10 Apply silicone lubricant (Material No.CP5063) to the threads of bolts (20).
11 Install the outer retainers (63) and (73) on the lock nut (81) and nut (90) with bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in )
. NOTE: If you use the nuts (50) again, do a 0.02 m.daN (1.77 lbf.in) running torque check.
NOTE: Before you install the retainers, make sure that the bolts and the washers are installed in the related holes.
(b) Install the right hand and center link: 1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
CAUTION:
MAKE SURE THAT THE RETAINER BRACKETS ARE INSTALLED WITH THE CORRECT ORIENTATION. IF THEY ARE NOT, DAMAGE TO THE HEATSHIELD CAN OCCUR.
4 Install the inner retainer (105) and the nut (90). 5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.99 and 80.01 lbf.ft )
. Increase the value as necessary to align the nuts with the anti-rotation retainer (105) when the retainer is installed.NOTE: For the center link, to prevent difficulty when you install the bolts (20), temporarily install the bolts (20) and the washers (45) in the holes of the retainer (105) with the set-up nuts. When you are ready to install the two outer retainers (65) and (75), remove the set-up nuts and install the required hardware.
6 Temporarily install the anti-rotation retainer (65) and record the position of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (65). 7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
NOTE: The lock nut (81) can only be used one time. If you removed the lock nut, discard it and replace it.
8 TORQUE the lock nut (81) to the minimum value to between 9.63 and 8.95 m.daN (71.02 and 66.00 lbf.ft ) . Increase the value as necessary to align the lock nut with the anti-rotation retainer (65), when the retainer is installed.9 Temporarily install the anti-rotation retainer (75) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (65).
10 Apply silicone lubricant (Material No.CP5063) on the threads of bolts (20).
11 Install the outer retainers (65) and (75) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in )
. NOTE: If you use the nuts (50) again, do a 0.02 m.daN (1.77 lbf.in) running torque check.
NOTE: Before you install the retainers, make sure that the bolts and the washers are installed in the related holes.
END OF POST SB RA32071-164
POST SB RA32071-174
(14) Torque and safety pins of the three links and cross beam side:
(a) Install the left hand link as follows:
1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
CAUTION:
MAKE SURE THAT THE RETAINER BRACKETS ARE INSTALLED WITH THE CORRECT ORIENTATION. IF THEY ARE NOT, DAMAGE TO THE HEATSHIELD CAN OCCUR.
4 Install the inner retainer (104) and the nut (90).5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.98 and 80.01 lbf.ft )
. Increase the value as necessary to align the nuts with the anti-rotation retainer (104) when the retainer is installed.6 Temporarily install the anti-rotation retainer (64) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (64).
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
NOTE: The lock nut (81) can only be used one time. If you removed the lock nut, discard it and replace it.
8 TORQUE the lock nut (81) to between 9.63 and 8.95 m.daN (71.02 and 66.00 lbf.ft ) . Increase the value as necessary to align the lock nut with the anti-rotation retainer (64) when the retainer is installed.9 Temporarily install the anti-rotation retainer (74) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (74).
10 Apply silicone lubricant (Material No.CP5063) to the threads of the bolts (20).
11 Install the outer retainers (64) and (74) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in )
.NOTE: If you use the nuts (50) again, do a 0.02 m.daN (1.77 lbf.in) running torque check.
NOTE: Before you install the retainers, make sure that the bolts and the washers are installed in the related holes.
(b) Install the right hand link:1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
CAUTION:
MAKE SURE THAT THE RETAINER BRACKETS ARE INSTALLED WITH THE CORRECT ORIENTATION. IF THEY ARE NOT, DAMAGE TO THE HEATSHIELD CAN OCCUR.
4 Install the inner retainer (106) and the nut (90).5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.98 and 80.01 lbf.ft )
. Increase the value as necessary to align the nuts with the anti-rotation retainer (106) when the retainer is installed.6 Temporarily install the anti-rotation retainer (66) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (66).
7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
NOTE: The lock nut (81) can only be used one time. If you removed the lock nut, discard it and replace it.
8 TORQUE the lock nut (81) to the minimum value to between 9.63 and 8.95 m.daN (71.02 and 66.00 lbf.ft ) . Increase the value as necessary to align the lock nut with the anti-rotation retainer (66), when the retainer is installed.9 Temporarily install the anti-rotation retainer (76) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (66).
10 Apply silicone lubricant (Material No.CP5063) on the threads of the bolts (20).
11 Install the outer retainers (66) and (76) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in )
.NOTE: If you use the nuts (50) again, do a 0.02 m.daN (1.77 lbf.in) running torque check.
NOTE: Before you install the retainers, make sure that the bolts and the washers are installed in the related holes.
(c) Install the center link:1 Install the link assembly (430) on the beam assembly (310) with the bracket (140) and the pin (130).
2 Install the pin (120) into the pin (130).
3 Install the retainer pin (110).
CAUTION:
MAKE SURE THAT THE RETAINER BRACKETS ARE INSTALLED WITH THE CORRECT ORIENTATION. IF THEY ARE NOT, DAMAGE TO THE HEATSHIELD CAN OCCUR.
4 Install the inner retainer (107) and the nut (90).5 TORQUE the nut (90) to the minimum value to between 12.88 and 10.85 m.daN (94.98 and 80.01 lbf.ft )
. Increase the value as necessary to align the nuts with the anti-rotation retainer (107) when the retainer is installed.NOTE: For the center link, to prevent difficulty when you install the bolts (20), temporarily install the bolts (20) and the washers (45) in the holes of the retainer (107) with the set-up nuts. When ready to install the two outer retainers (67) and (77), remove the set-up nuts and install the required hardware.
6 Temporarily install the anti-rotation retainer (67) and record the position necessary for the alignment of the nut. Then, increase the torque of the nut (90) as necessary (do not torque the nut more than the maximum torque value) to align the nut with the retainer (67).7 Install a new AIPC 71-22-11-01-080 LOCK NUT (81).
NOTE: The lock nut (81) can only be used one time. If you removed the lock nut, discard it and replace it.
8 TORQUE the lock nut (81) to the minimum value to between 9.63 and 8.95 m.daN (71.02 and 66.00 lbf.ft ) . Increase the value as necessary to align the lock nut with the anti-rotation retainer (67), when the retainer is installed.9 Temporarily install the anti-rotation retainer (77) and record the position necessary for the alignment of the lock nut. Then, increase the torque of the lock nut (81) as necessary (do not torque the lock nut more than the maximum torque value) to align the lock nut with the retainer (67).
10 Apply silicone lubricant (Material No.CP5063) on the threads of bolts (20).
11 Install the outer retainers (67) and (77) on the lock nut (81) and nut (90) with the bolts (20), washers (45) and nuts (50).
12 TORQUE the nuts (50) to between 0.31 and 0.26 m.daN (27.43 and 23.01 lbf.in )
.NOTE: If you use the nuts (50) again, do a 0.02 m.daN (1.77 lbf.in) running torque check.
NOTE: Before you install the retainers, make sure that the bolts and the washers are installed in the related holes.
END OF POST SB RA32071-174
Subtask 71-22-11-080-051-A ** ON A/C NOT FOR ALL
A. Remove the Bootstrap System
(1) Remove the chain pulley blocks and the dynamometers from the rear beam (9) and the forward hinge arms (4) and (5).
(2) Remove the two ball pins (8) then remove the rear beam (9) from the pylon.
(3) Remove the ball pins (1) then remove the link (2).
(4) Remove the ball pins (3) and remove the forward hinge arms (4) and (5).
(5) Release the left and right clamps (7) and remove the spacer and the center hinge clamp (6) from the pyramid.
Subtask 71-22-11-410-061-A ** ON A/C NOT FOR ALL (1) Remove the chain pulley blocks and the dynamometers from the rear beam (9) and the forward hinge arms (4) and (5).
(2) Remove the two ball pins (8) then remove the rear beam (9) from the pylon.
(3) Remove the ball pins (1) then remove the link (2).
(4) Remove the ball pins (3) and remove the forward hinge arms (4) and (5).
(5) Release the left and right clamps (7) and remove the spacer and the center hinge clamp (6) from the pyramid.
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
(3) Remove the access platform(s).
Subtask 71-22-11-440-053-A ** ON A/C NOT FOR ALL Subtask 71-22-11-410-062-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.
(3) Remove the access platform(s).