Nacelle Maintenance Practices [CFMB]
TASK 70-60-00-910-041-A
Nacelle Maintenance Practices
This section contains standard practices for use in maintenance and repair tasks on the engine nacelle.
Read the applicable section of this manual to become acquainted with the items to be installed and the procedures to be followed before work is done on the engine.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 70-60-00-869-054-A ** ON A/C NOT FOR ALL
Subtask 70-60-00-640-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:19:00 UTC
Nacelle Maintenance Practices
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis section contains standard practices for use in maintenance and repair tasks on the engine nacelle.
Read the applicable section of this manual to become acquainted with the items to be installed and the procedures to be followed before work is done on the engine.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | BRUSH - BRISTLED |
| No specific | 1 | BRUSH - NYLON |
| No specific | 1 | PLIERS - CONNECTOR, JAW, SOFT |
| No specific | 1 | WIRE - SOFT, FLEXIBLE |
| No specific | 1 | WRENCH - STRAP |
| REFERENCE | DESIGNATION |
|---|---|
| isopropyl alcohol | |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| REFERENCE | DESIGNATION |
|---|---|
Subtask 70-60-00-869-054-A ** ON A/C NOT FOR ALL
A. Not Applicable.
4. ProcedureSubtask 70-60-00-640-051-A ** ON A/C NOT FOR ALL
A. Lubrication
(1) Lubricate packings with petrolatum or the fluid contained in the system that is being serviced (i.e. hydraulic fluid for the hydraulic system) before installation if not specified.
(2) Apply grease or anti-seize compound to fasteners as specified.
(3) Lubricate all pneumatic duct couplings with MIL-L-23398.
Subtask 70-60-00-912-052-A ** ON A/C NOT FOR ALL (1) Lubricate packings with petrolatum or the fluid contained in the system that is being serviced (i.e. hydraulic fluid for the hydraulic system) before installation if not specified.
(2) Apply grease or anti-seize compound to fasteners as specified.
(3) Lubricate all pneumatic duct couplings with MIL-L-23398.
B. Electrical Connector Cleaning
(1) Clean the electrical connector pins and connector face as follows:
CP 1041 isopropyl alcohol to remove contamination and other unwanted materials.
(b) Clean the electrical connector pins and connector face withCP 1041 isopropyl alcohol and a natural BRUSH - BRISTLED.
(c) Flush the electrical connector again withCP 1041 isopropyl alcohol to remove the remaining contamination and other unwanted materials. If heavily contaminated, repeat the steps as necessary to remove all contamination.
(d) Remove the remainingCP 1041 isopropyl alcohol from the connector.
(e) Dry the electrical connector.
(2) Clean the electrical connector socket contacts and connector face as follows:
CP 1041 isopropyl alcohol to remove contamination and other unwanted materials from the socket contacts and connector face.
(b) Clean the electrical connector.
CP 1041 isopropyl alcohol and a miniature BRUSH - NYLON. Use a miniature nylon brush that is sized for the specific socket contact. Use a 0.031 in. (0.79 mm) brush for 20 gauge socket contacts and a 0.062 in. (1.57 mm) brush for 16 gauge socket contacts.
(c) Clean the electrical connector face withCP 1041 isopropyl alcohol and a natural BRUSH - BRISTLED.
(d) Flush the electrical connector again withCP 1041 isopropyl alcohol to remove the remaining contamination and other unwanted materials. If heavily contaminated, repeat the steps as necessary to remove all contamination.
(e) Remove the remainingCP 1041 isopropyl alcohol from the connector.
(f) Dry the electrical connector.
Subtask 70-60-00-280-051-A ** ON A/C NOT FOR ALL (1) Clean the electrical connector pins and connector face as follows:
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
CLEAN THE ELECTRICAL CONNECTORS ONLY WITH ISOPROPYL ALCOHOL (CP 1041). SOLVENT OTHER THAN ISOPROPYL ALCOHOL WILL DAMAGE THE CONNECTOR AND CAUSE POSSIBLE DAMAGE TO THE MATING COMPONENT.
(a) Flush the electrical connector with (b) Clean the electrical connector pins and connector face with
(c) Flush the electrical connector again with
(d) Remove the remaining
(e) Dry the electrical connector.
WARNING:
WHEN YOU USE COMPRESSED AIR:
1 Allow the electrical connector to fully dry. If necessary, blow the electrical connector dry with clean, filtered air at a maximum pressure of 30 psi (2.07 bar). - USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
- DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS
- DO NOT LET THE PRESSURE BE MORE THAN 30 PSIG (200 KPA).
(2) Clean the electrical connector socket contacts and connector face as follows:
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
CLEAN THE ELECTRICAL CONNECTORS ONLY WITH ISOPROPYL ALCOHOL (CP 1041). SOLVENT OTHER THAN ISOPROPYL ALCOHOL WILL DAMAGE THE CONNECTOR AND CAUSE POSSIBLE DAMAGE TO THE MATING COMPONENT.
(a) Flush the electrical connector with (b) Clean the electrical connector.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
CAUTION:
MAKE SURE YOU USE THE CORRECT SIZE MINIATURE NYLON BRUSH TO CLEAN THE ELECTRICAL CONNECTOR SOCKET CONTACTS. USE A MINIATURE NYLON BRUSH THAT IS SIZED FOR THE SPECIFIC SOCKET CONTACT. OTHERWISE, DAMAGE TO THE SOCKET CONTACT CAN OCCUR OR THE SOCKET CONTACTS WILL NOT BE SUFFICIENTLY CLEANED.
1 Clean the electrical connector socket contacts with (c) Clean the electrical connector face with
(d) Flush the electrical connector again with
(e) Remove the remaining
(f) Dry the electrical connector.
WARNING:
WHEN YOU USE COMPRESSED AIR:
1 Allow the electrical connector to fully dry. If necessary, blow the electrical connector dry with clean, filtered air at a maximum pressure of 30 psi (2.07 bar). - USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
- DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS
- DO NOT LET THE PRESSURE BE MORE THAN 30 PSIG (200 KPA).
C. Check of the Connector Socket Tension
(1) (Preferred method) Do a check of the connector socket tension using a spring scale capable of measuring 0.6 oz (17.01 g) to 1.5 oz (42.52 g) and a locally-manufactured pin.
(a) Locally manufacture the pin.
(b) Install the locally-manufactured pin in the female connector.
(c) Attach the spring scale to the pin.
(d) Pull upward on the pin with the spring scale.
(e) Measure the force required to pull the pin out of the female connector.
1 The force must be more than 1.5 oz (42.52 g) for a no. 16 wire pin.
2 The force must be more than 0.6 oz (17.01 g) for a no. 20 wire pin.
(f) Replace the female connector if the force necessary to remove the pin is less than the limits in step (1).(e). above.
(2) (Alternate method) Do a check of the connector contact tension using a weight of 0.6 oz (17.01 g) to 1.5 oz (42.52 g) and a locally-manufactured pin.
(b) Attach a weight to the pin with a WIRE - SOFT, FLEXIBLE.
1 Attach a 1.5 oz (42.52 g) weight for a no. 16 wire pin.
2 Attach a 0.6 oz (17.01 g) weight for a no. 20 wire pin.
(c) With the female connector facing down, install the locally-manufactured pin in the female connector. Let the weight hang free below the connector.
(d) Replace the connector if the weight pulls the pin out of the female connector.
(3) Replace the wiring harness if defects cannot be repaired. See the applicable removal/installation procedure for each wiring harness.
Subtask 70-60-00-420-052-A ** ON A/C NOT FOR ALL (1) (Preferred method) Do a check of the connector socket tension using a spring scale capable of measuring 0.6 oz (17.01 g) to 1.5 oz (42.52 g) and a locally-manufactured pin.
(a) Locally manufacture the pin.
(b) Install the locally-manufactured pin in the female connector.
(c) Attach the spring scale to the pin.
(d) Pull upward on the pin with the spring scale.
(e) Measure the force required to pull the pin out of the female connector.
1 The force must be more than 1.5 oz (42.52 g) for a no. 16 wire pin.
2 The force must be more than 0.6 oz (17.01 g) for a no. 20 wire pin.
(f) Replace the female connector if the force necessary to remove the pin is less than the limits in step (1).(e). above.
(2) (Alternate method) Do a check of the connector contact tension using a weight of 0.6 oz (17.01 g) to 1.5 oz (42.52 g) and a locally-manufactured pin.
NOTE: Use this method if you do not have a spring scale.
(a) Locally manufacture the pin. (b) Attach a weight to the pin with a WIRE - SOFT, FLEXIBLE.
1 Attach a 1.5 oz (42.52 g) weight for a no. 16 wire pin.
2 Attach a 0.6 oz (17.01 g) weight for a no. 20 wire pin.
(c) With the female connector facing down, install the locally-manufactured pin in the female connector. Let the weight hang free below the connector.
(d) Replace the connector if the weight pulls the pin out of the female connector.
(3) Replace the wiring harness if defects cannot be repaired. See the applicable removal/installation procedure for each wiring harness.
D. Electrical Wire Harness Installation
(1) Make sure there is a sufficient drop in the wire harness to prevent tightness on the wire harness connectors and receptacles.
(2) Make sure there is maximum clearance between adjacent wire harnesses.
(3) Make sure there is maximum clearance between wire harnesses and engine components.
(4) Make sure there is maximum clearance between wire harnesses and hot sections of the engine.
(5) Install protective covers over the open ends of connectors and receptacles.
(6) Install connectors carefully to prevent damage to connector pins.
(7) Tighten self-locking electrical connectors as follows:
(a) Make sure that the electrical connector is clean and in satisfactory condition.
(b) Align the master-key (largest key) on the connector with the master-key in the receptacle.
(c) Use light hand pressure and push the connector into the receptacle. Turn the coupling nut of the connector in a clockwise direction to engage the connector threads.
(d) Tighten the connector.
(8) Remove oil, grease, dirt, and other surface contaminants with a clean cotton cloth dampened with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(9) Remove paint and primer coatings from attach hole areas before installation of jumpers.
(10) Clamp sizes needed for installation can change from those given in a procedure.
(a) Differences in wire diameter between different vendors'wire, as well as differences in the position of the wire bundle, can change the bundle size at any given point.
(b) Installation of a wire bundle can require a different clamp size, either one size larger, or one size smaller than the size shown.
(c) If necessary, wind tape (material No. CP2208) around the harness at the location where the clamp is to be installed to make sure the clamp fits correctly.
(11) Make sure that the installation reference markers are in the correct position before you tighten the line blocks or clamps. To permit adjustment of the harness routing, the installation reference markers can be +/- 0.5 inch (12.7 mm) off-center in the clamp.
Subtask 70-60-00-420-053-A ** ON A/C NOT FOR ALL (1) Make sure there is a sufficient drop in the wire harness to prevent tightness on the wire harness connectors and receptacles.
(2) Make sure there is maximum clearance between adjacent wire harnesses.
(3) Make sure there is maximum clearance between wire harnesses and engine components.
(4) Make sure there is maximum clearance between wire harnesses and hot sections of the engine.
(5) Install protective covers over the open ends of connectors and receptacles.
(6) Install connectors carefully to prevent damage to connector pins.
(7) Tighten self-locking electrical connectors as follows:
(a) Make sure that the electrical connector is clean and in satisfactory condition.
(b) Align the master-key (largest key) on the connector with the master-key in the receptacle.
(c) Use light hand pressure and push the connector into the receptacle. Turn the coupling nut of the connector in a clockwise direction to engage the connector threads.
(d) Tighten the connector.
CAUTION:
YOU MUST NOT STOP AT THE COLORED COUPLING INDICATOR LINE ON THE RECEPTACLE WHEN YOU TIGHTEN THE CONNECTOR. IF YOU STOP AT THE COLORED LINE THE CONNECTION WILL NOT BE TIGHT. THIS CAN CAUSE MECHANICAL AND/OR ELECTRICAL FAILURE.
1 With the threads correctly engaged, continue to turn the coupling nut clockwise with your hand until the connection is tight. Make sure that the colored coupling indicator line on the receptacle cannot be seen when the connection if fully tight. NOTE: If you move the connector from side to side when you turn the coupling nut it will make it easier to tighten.
(e) Tighten the connector. CAUTION:
YOU MUST NOT USE PLIERS WITH METAL JAWS TO TIGHTEN OR LOOSEN THE CONNECTOR. THE METAL JAWS WILL CAUSE DAMAGE TO THE CONNECTOR.
1 Turn the connector ring 1/8 to 1/4 turn with PLIERS - CONNECTOR, JAW, SOFT or a WRENCH - STRAP to ensure the connector is tight. Stop before the PLIERS - CONNECTOR, JAW, SOFT or WRENCH - STRAP slip on the connector ring. (8) Remove oil, grease, dirt, and other surface contaminants with a clean cotton cloth dampened with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(9) Remove paint and primer coatings from attach hole areas before installation of jumpers.
(10) Clamp sizes needed for installation can change from those given in a procedure.
(a) Differences in wire diameter between different vendors'wire, as well as differences in the position of the wire bundle, can change the bundle size at any given point.
(b) Installation of a wire bundle can require a different clamp size, either one size larger, or one size smaller than the size shown.
(c) If necessary, wind tape (material No. CP2208) around the harness at the location where the clamp is to be installed to make sure the clamp fits correctly.
(11) Make sure that the installation reference markers are in the correct position before you tighten the line blocks or clamps. To permit adjustment of the harness routing, the installation reference markers can be +/- 0.5 inch (12.7 mm) off-center in the clamp.
E. Tubes Installation
(1) Correctly align tubes between tube components to make sure the threaded parts are connected correctly.
(2) Install protective covers over open ends of tubes.
Subtask 70-60-00-911-054-A ** ON A/C NOT FOR ALL (1) Correctly align tubes between tube components to make sure the threaded parts are connected correctly.
(2) Install protective covers over open ends of tubes.
F. Dissimilar Metals Protection
(1) Clean touching surfaces
(2) Apply one coat of primer to the mating surfaces of the bracket and the structural surface, and install.
(3) Apply wet coat of primer to bolts before installation.
Subtask 70-60-00-911-055-A ** ON A/C NOT FOR ALL (1) Clean touching surfaces
CAUTION:
DO NOT USE CHLORINATED SOLVENTS ON TITANIUM PARTS.
(a) Clean mating surfaces with a clean cloth and ethyl acetate, and make dry immediately with clean, dry cloth. (2) Apply one coat of primer to the mating surfaces of the bracket and the structural surface, and install.
(3) Apply wet coat of primer to bolts before installation.
G. Lockwire
(1) Use double-twist lockwire procedure in accordance with the operator's standard practices.
Subtask 70-60-00-869-055-A ** ON A/C NOT FOR ALL Subtask 70-60-00-869-056-A ** ON A/C NOT FOR ALL (1) Use double-twist lockwire procedure in accordance with the operator's standard practices.
I. Engine Flange Hole Identification
(1) This manual contains numerous equipment items and brackets that are installed on engine flanges at numbered bolt holes.
(2) Some fan case flanges have "absent" bolt holes. The distance from one bolt hole to another bolt hole will be double the average bolt hole distance. The absent hole must be counted as if it were an actual hole.
(3) Some flanges have two holes at the same location. The hole number is the same for each of these holes.
(4) To find the location of a hole used in an installation procedure, do the following:
(a) Count down from the first hole on the flange to the right or left of the top centerline of the engine.
(b) Count the equally spaced holes until the correct hole is reached.
Subtask 70-60-00-911-053-A ** ON A/C NOT FOR ALL (1) This manual contains numerous equipment items and brackets that are installed on engine flanges at numbered bolt holes.
(2) Some fan case flanges have "absent" bolt holes. The distance from one bolt hole to another bolt hole will be double the average bolt hole distance. The absent hole must be counted as if it were an actual hole.
(3) Some flanges have two holes at the same location. The hole number is the same for each of these holes.
(4) To find the location of a hole used in an installation procedure, do the following:
(a) Count down from the first hole on the flange to the right or left of the top centerline of the engine.
(b) Count the equally spaced holes until the correct hole is reached.
J. Torque Value Tables
(1) Torque values for hydraulic, non positional tube fittings (unions, reducers), positionable tube fittings, and AN924 jam nuts.
(2) Torque values for non hydraulic, non positional tube fittings (unions, reducers), positionable tube fittings, and AN924 jam nuts.
(3) Torque values for flared tube steel coupling nuts.
(6) Torque values for AN316 and NSA1022 shear type nuts.
(7) Torque values for screws, bolts, and studs with NAS158 bolts.
* Do not use for shear heat bolts.
* Do not use for shear head bolts.
Subtask 70-60-00-869-057-A ** ON A/C NOT FOR ALL (1) Torque values for hydraulic, non positional tube fittings (unions, reducers), positionable tube fittings, and AN924 jam nuts.
| ------------------------------------------------------------------------------- |
| ! ! OUTSIDE ! NONPOSITIONAL ! POSITIONAL FITTINGS ! |
| !NOMINAL ! DIAMETER ! FITTINGS ! AND JAMNUTS ! |
| ! ! ---------------------------------------------------- |
| ! SIZE ! INCHES ! lbf.in ! m.daN ! lbf.in ! m.daN ! |
| ------------------------------------------------------------------------------- |
| !- 2 ! 1/8 ! 75-80 ! 0.85-0.90 ! ! ! |
| ------------------------------------------------------------------------------- |
| !- 3 ! 3/16 ! 90-95 ! 1.00-1.07 ! ! ! |
| ------------------------------------------------------------------------------- |
| !- 4 ! 1/4 ! 125-135 ! 1.41-1.53 ! 110-120 ! 1.24-1.36 ! |
| ------------------------------------------------------------------------------- |
| !- 5 ! 5/16 ! 175-185 ! 1.98-2.09 ! 150-160 ! 1.70-1.81 ! |
| ------------------------------------------------------------------------------- |
| !- 6 ! 3/8 ! 300-315 ! 3.39-3.56 ! 200-210 ! 2.26-2.37 ! |
| ------------------------------------------------------------------------------- |
| !- 8 ! 1/2 ! 600-625 ! 6.78-7.06 ! 312-320 ! 3.53-3.62 ! |
| ------------------------------------------------------------------------------- |
| !- 10 ! 5/8 ! 700-730 ! 7.91-8.25 ! 600-625 ! 6.78-7.06 ! |
| ------------------------------------------------------------------------------- |
| !- 12 ! 3/4 ! 900-940 ! 10.17-10.62! 900-940 !10.17-10.62! |
| ------------------------------------------------------------------------------- |
| !- 16 ! 1.0 ! 1000-1050 ! 11.30-11.87! 1000-1050 !11.30-11.87! |
| ------------------------------------------------------------------------------- |
| !- 20 ! 1-1/4 ! 1000-1050 ! 10.30-11.87! 1000-1050 !11.30-11.87! |
| ------------------------------------------------------------------------------- |
| !- 24 ! 1-1/2 ! 1000-1050 ! 11.30-11.87! 1000-1050 !11.30-11.87! |
| ------------------------------------------------------------------------------- |
| !- 28 ! 1-3/4 ! 1000-1050 ! 11.30-11.87! 1000-1050 !11.30-11.87! |
| ------------------------------------------------------------------------------- |
| !- 32 ! 2 ! 1000-1050 ! 11.30-11.87! 1000-1050 !11.30-11.87! |
| ------------------------------------------------------------------------------- |
(2) Torque values for non hydraulic, non positional tube fittings (unions, reducers), positionable tube fittings, and AN924 jam nuts.
| --------------------------------------------------------------------------- |
| ! ! OUTSIDE ! ! ! |
| ! NOMINAL ! DIAMETER ! ! ! |
| ! SIZE ! INCHES ! lbf.in ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! - 2 ! 1/8 ! 75-80 ! 0.86-0.90 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 3 ! 3/16 ! 90-95 ! 1.00-1.07 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 4 ! 1/4 ! 100-110 ! 1.13-1.24 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 5 ! 5/16 ! 130-140 ! 1.47-1.58 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 6 ! 3/8 ! 140-150 ! 1.58-1.70 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 8 ! 1/2 ! 240-260 ! 2.71-2.94 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 10 ! 5/8 ! 400-425 ! 4.52-4.80 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 12 ! 3/4 ! 430-455 ! 4.86-5.15 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 16 ! 1 ! 900-950 ! 10.17-10.73 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 20 ! 1-1/4 ! 900-950 ! 10.17-10.73 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 24 ! 1-1/2 ! 1000-1075 ! 11.30-12.15 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 28 ! 1-3/4 ! 1000-1075 ! 11.30-12.15 ! |
| !----------!----------------!--------------------!------------------------! |
| ! - 32 ! 2 ! 1000-1075 ! 11.30-12.75 ! |
| --------------------------------------------------------------------------- |
(3) Torque values for flared tube steel coupling nuts.
| --------------------------------------------------------------------------- |
| ! ! OUTSIDE ! ! |
| ! DASH ! DIAMETER ! TORQUE VALUE ! |
| ! ! ----------------------------------------------- |
| ! SIZE ! INCHES ! lbf.in ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! - 2 ! 1/8 ! 90-100 ! 1.02-1.13 ! |
| --------------------------------------------------------------------------- |
| ! - 3 ! 3/16 ! 90-100 ! 1.02-1.13 ! |
| --------------------------------------------------------------------------- |
| ! - 4 ! 1/4 ! 135-150 ! 1.53-1.70 ! |
| --------------------------------------------------------------------------- |
| ! - 5 ! 5/16 ! 180-200 ! 2.03-2.26 ! |
| --------------------------------------------------------------------------- |
| ! - 6 ! 3/8 ! 270-300 ! 3.05-3.39 ! |
| --------------------------------------------------------------------------- |
| ! - 8 ! 1/2 ! 450-500 ! 5.09-5.65 ! |
| --------------------------------------------------------------------------- |
| ! - 10 ! 5/8 ! 650-700 ! 7.35-7.91 ! |
| --------------------------------------------------------------------------- |
| ! - 12 ! 3/4 ! 900-1000 ! 10.17-11.30 ! |
| --------------------------------------------------------------------------- |
| ! - 14 ! 7/8 ! 1000-1100 ! 11.30-12.43 ! |
| --------------------------------------------------------------------------- |
| ! - 16 ! 1.0 ! 1200-1400 ! 13.56-15.82 ! |
| --------------------------------------------------------------------------- |
| ! - 20 ! 1-1/4 ! 1200-1400 ! 13.56-15.82 ! |
| --------------------------------------------------------------------------- |
| ! - 24 ! 1-1/2 ! 1500-1800 ! 16.95-20.34 ! |
| --------------------------------------------------------------------------- |
NOTE: Tube nominal size or outside diameter is equal to the amount of torque that is given in the table.
(4) Torque values for flareless tube steel coupling nuts. - Hold the coupling hex with a wrench when you tighten or loosen the B-nut.
| ------------------------------------------------------------------------- |
| ! NOMINAL ! OUTSIDE DIAMETER ! TORQUE VALUE ! |
| ! ! ----------------------------------- |
| ! SIZE ! INCHES ! lbf.in ! m.daN ! |
| ------------------------------------------------------------------------- |
| ! - 3 ! 3/16 ! 95-105 ! 1.07-1.19 ! |
| ------------------------------------------------------------------------- |
| ! - 4 ! 1/4 ! 135-145 ! 1.53-1.64 ! |
| ------------------------------------------------------------------------- |
| ! - 5 ! 5/16 ! 170-190 ! 1.92-2.15 ! |
| ------------------------------------------------------------------------- |
| ! - 6 ! 3/8 ! 215-245 ! 2.43-2.77 ! |
| ------------------------------------------------------------------------- |
| ! - 8 ! 1/2 ! 430-470 ! 4.86-5.31 ! |
| ------------------------------------------------------------------------- |
| ! - 10 ! 5/8 ! 620-680 ! 7.01-7.68 ! |
| ------------------------------------------------------------------------- |
| ! - 12 ! 3/4 ! 855-945 ! 9.66-10.68 ! |
| ------------------------------------------------------------------------- |
| ! - 16 ! 1 ! 1140-1260 ! 12.88-14.24 ! |
| ------------------------------------------------------------------------- |
| ! - 20 ! 1-1/4 ! 1520-1680 ! 17.18-18.98 ! |
| ------------------------------------------------------------------------- |
| ! - 24 ! 1-1/2 ! 1900-2100 ! 21.47-23.73 ! |
| ------------------------------------------------------------------------- |
NOTE: Tube nominal size or outside diameter is equal to the amount of torque that is given in the table.
(5) Torque values for screws, bolts, and studs with castellated nuts (MS21042, MS21043, NAS679, Specification 48 FT) and low height nutplates. - Hold the coupling hex with a wrench when you tighten or loosen the B-nut.
| --------------------------------------------------------------------------- |
| ! THREAD ! ! |
| ! NOMINAL SIZE ! TORQUE VALUE ! |
| ! ------------------------------------------------ |
| ! INCHES ! lbf.in ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! 6-32 ! 8-10 ! 0.09-0.11 ! |
| --------------------------------------------------------------------------- |
| ! 8-32 ! 12-15 ! 0.14-0.17 ! |
| --------------------------------------------------------------------------- |
| ! 10-32 ! 20-25 ! 0.23-0.28 ! |
| --------------------------------------------------------------------------- |
| ! 1/4-28 ! 50-70 ! 0.57-0.79 ! |
| --------------------------------------------------------------------------- |
| ! 5/16-24 ! 100-140 ! 1.13-1.58 ! |
| --------------------------------------------------------------------------- |
| ! 3/8-24 ! 160-190 ! 1.81-2.15 ! |
| --------------------------------------------------------------------------- |
| ! 7/16-20 ! 450-500 ! 5.08-5.65 ! |
| --------------------------------------------------------------------------- |
| ! 1/2-20 ! 480-690 ! 5.42-7.80 ! |
| --------------------------------------------------------------------------- |
| ! 9/16-18 ! 800-1000 ! 9.04-11.30 ! |
| --------------------------------------------------------------------------- |
| ! 5/8-18 ! 1100-1300 ! 12.43-14.69 ! |
| --------------------------------------------------------------------------- |
| --------------------------------------------------------------------------- |
| ! THREAD ! ! |
| ! NOMINAL SIZE ! TORQUE VALUE ! |
| ! ------------------------------------------------- |
| ! INCHES ! lbf.ft ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! 3/4-16 ! 192-208 ! 26.11-28.29 ! |
| --------------------------------------------------------------------------- |
| ! 7/8-14 ! 208-250 ! 28.29-34.00 ! |
| --------------------------------------------------------------------------- |
| ! 1-12 ! 308-458 ! 41.89-62.29 ! |
| --------------------------------------------------------------------------- |
| ! 1-1/8-12 ! 417-583 ! 56.71-79.29 ! |
| --------------------------------------------------------------------------- |
| ! 1-1/4-12 ! 750-917 ! 102.00-124.71 ! |
| --------------------------------------------------------------------------- |
(6) Torque values for AN316 and NSA1022 shear type nuts.
| --------------------------------------------------------------------------- |
| ! THREAD ! ! |
| ! NOMINAL SIZE ! TORQUE VALUE ! |
| ! ------------------------------------------------- |
| ! INCHES ! lbf.in ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! 6-32 ! 5-7 ! 0.06-0.08 ! |
| --------------------------------------------------------------------------- |
| ! 8-32 ! 8-10 ! 0.09-0.11 ! |
| --------------------------------------------------------------------------- |
| ! 10-32 ! 12-15 ! 0.14-0.17 ! |
| --------------------------------------------------------------------------- |
| ! 1/4-28 ! 30-40 ! 0.34-0.45 ! |
| --------------------------------------------------------------------------- |
| ! 5/16-24 ! 60-85 ! 0.68-0.96 ! |
| --------------------------------------------------------------------------- |
| ! 3/8-24 ! 95-110 ! 1.07-1.24 ! |
| --------------------------------------------------------------------------- |
| ! 7/16-20 ! 270-300 ! 3.05-3.39 ! |
| --------------------------------------------------------------------------- |
| ! 1/2-20 ! 290-410 ! 3.28-4.63 ! |
| --------------------------------------------------------------------------- |
| ! 9/16-18 ! 480-600 ! 5.42-6.78 ! |
| --------------------------------------------------------------------------- |
| ! 5/8-18 ! 660-780 ! 7.46-8.81 ! |
| --------------------------------------------------------------------------- |
| --------------------------------------------------------------------------- |
| ! THREAD ! ! |
| ! NOMINAL SIZE ! TORQUE VALUE ! |
| ! ------------------------------------------------ |
| ! INCHES ! lbf.ft ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! 3/4-16 ! 115-125 ! 14.64-16.95 ! |
| --------------------------------------------------------------------------- |
| ! 7/8-14 ! 125-150 ! 16.95-20.34 ! |
| --------------------------------------------------------------------------- |
| ! 1-12 ! 185-275 ! 24.81-37.28 ! |
| --------------------------------------------------------------------------- |
| ! 1-1/8-12 ! 250-350 ! 33.90-47.45 ! |
| --------------------------------------------------------------------------- |
| ! 1-1/4-12 ! 450-550 ! 61.01-74.57 ! |
| --------------------------------------------------------------------------- |
(7) Torque values for screws, bolts, and studs with NAS158 bolts.
| --------------------------------------------------------------------------- |
| ! THREAD ! ! |
| ! NOMINAL SIZE ! *TORQUE VALUE ! |
| ! ------------------------------------------------ |
| ! INCHES ! lbf.in ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! 10-32 ! 45-50 ! 0.51-0.56 ! |
| --------------------------------------------------------------------------- |
| ! 1/4-28 ! 80-100 ! 0.90-1.13 ! |
| --------------------------------------------------------------------------- |
| ! 5/16-24 ! 145-200 ! 1.64-2.26 ! |
| --------------------------------------------------------------------------- |
| ! 3/8-24 ! 240-280 ! 2.71-3.16 ! |
| --------------------------------------------------------------------------- |
| ! 7/16-20 ! 670-720 ! 7.57-8.13 ! |
| --------------------------------------------------------------------------- |
| ! 1/2-20 ! 700-1000 ! 7.91-11.30 ! |
| --------------------------------------------------------------------------- |
| ! 9/16-18 ! 1200-1400 ! 13.56-15.82 ! |
| --------------------------------------------------------------------------- |
| ! 5/8-18 ! 1680-1860 ! 18.98-21.01 ! |
| --------------------------------------------------------------------------- |
| --------------------------------------------------------------------------- |
| ! THREAD ! ! |
| ! NOMINAL SIZE ! *TORQUE VALUE ! |
| ! ------------------------------------------------- |
| ! INCHES ! lbf.ft ! m.daN ! |
| --------------------------------------------------------------------------- |
| ! 3/4-16 ! 280-300 ! 37.96-40.67 ! |
| --------------------------------------------------------------------------- |
| ! 7/8-14 ! 300-360 ! 40.67-48.81 ! |
| --------------------------------------------------------------------------- |
| ! 1-12 ! 450-665 ! 61.01-90.16 ! |
| --------------------------------------------------------------------------- |
| ! 1-1/8-12 ! 605-845 ! 82.03-114.57 ! |
| --------------------------------------------------------------------------- |
| ! 1-1/4-12 ! 1085-1320 ! 147.10-178.97 ! |
| --------------------------------------------------------------------------- |
K. Special Tools, Fixtures, and Equipment.
The ground support equipment (GSE) that follows are used during engine and nacelle maintenance.
The ground support equipment (GSE) that follows are used during engine and nacelle maintenance.
| NAME | PART NO. | USAGE |
|---|---|---|
| Wench, spanner | RSE1098-1 | Tighten and torque the aft engine mount nuts |
| Wrench, spanner | RSE1098-5 | Tighten and torque the aft engine mount nuts |
| Sling, Inlet Cowl | RSE1112 | Lift the air intake cowl |
| Sling, Fan Cowl | RSE1113 | Lift the fan cowl door |
| Cover, Inlet Cowl | RSE1244 | Keep unwanted material from the air inlet |
| Dolly, Fan Cowl and workstand | RSE1115 | Movable workstand for the fan cowl door |
| Dolly, Inlet Cowl and workstand | RSE1116 | Movable workstand for the inlet cowl |
| Thread Protector fan cowl door bolt | RSE1117 RSE3414 | Prevent damage to bolt threads |
| Centerbody support Fixture | RSE1129 | Hold the centerbody |
| Nozzle support Fixture | RSE1130 | Hold the nozzle |
| Sling, Nozzle | RSE1133 | Lift the nozzle |
| Dolly, nozzle | RSE1134 | Movable dolly to hold the nozzle |
| Wrench, spanner, anti-ice duct | RSE1147 | Tighten and torque the anti- ice seal nut |
| Adapter tool, torque | RSE1234 | Tighten and torque the pressure relief door latch |
| Sling, handling | HIX1001-0G | Removal and install the TR half door |
| Handling bracket pivoting door | HIX1003 | Hold the upper blocker door in the open position |
| Workstand, mobile | HIX3001-0G | Movable workstand for the TR half door |
| Hold-open rod, pivoting door | HIX3002 | Hold the blocker door in the open position |
| Safety-sleeve pivoting door actuator | HIX3005 | Hold the blocker door in the deploy position |
| Hydraulic actuator rod, extension-retraction stand | HIX3007 | Extend the hydraulic actuator rod |
| Hand pump, cowl-actuator, fan reverser | HIX4001 | Extend the TR half door opening actuator |
| Hoist, accessory IDG | S387IDG | Remove and install the integrated drive generator |
Electrical Connector Socket Tension