TASK 70-46-03-400-501 Installation Of Rigid Tubes

DMC:V2500-00-70-46-03-00A-720A-D|Issue No:001.00|Issue Date:2013-03-20

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 70-46-03-400-501 Installation Of Rigid Tubes

General

Use protective caps or other applicable material to prevent contamination of the inside of the tube and to prevent damage to the tube connectors.

Protective caps must be installed on the outside of the tube connectors. Refer to Figure for an example of the correct type of protective cap.

The protective caps must only be removed only when the tube is to have maintenance work done on it, or immediately before installation.

Before the tube is installed make sure that it is clean and has no damage.

Refer to the SPM TASK 70-41-00-400-501 for information on general torque tightening techniques and SPM TASK 70-41-01-400-501 for guidance on the use of torque wrenches and power tools.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 70-46-03-440-001 Installation of Tubes

      1. Installation of Bolted Flanges.

      1. Install the applicable seals.

      2. Put the tube assembly in the correct position on the engine or component.

      3. Put the bolts in one end flange. Make sure that the seal is correctly located.

      4. Tighten the bolts sufficiently to hold the seal.

      5. Make sure that the seal is correctly located on the other end flange.

      6. Put the end flange on the engine or component.

      7. Make sure that total flange area contact can be obtained. If total flange area contact can not be obtained investigate the cause and reject the tube if necessary.

      8. CAUTION

        DO NOT APPLY FORCE THAT CAN TWIST OR BEND THE TUBE WHILE YOU INSTALL IT. THIS WILL PREVENT DAMAGE TO THE TUBE AND ENGINE COMPONENTS.

        Install the retaining bolts. The flange clearance holes must align with the tappings in the engine or component. If they do not, investigate and reject the tube if necessary.

      9. NOTE

        Where a tube has a center connection, you must tighten the center connection first.

        Tighten the retaining bolts to the torque value specified in the Engine Manual.

      2. Installation of tubes with single nut conical sealing joints.

      1. Put the tube assembly in the correct position on the engine or component.

      2. Engage the ferrule at the one end of the tube in its conical seat. Engage the nut onto its mating thread and tighten it with your fingers. Make sure that the tube is square to the rear of the nut.

      3. CAUTION

        DO NOT APPLY FORCE THAT CAN TWIST OR BEND THE TUBE WHILE YOU INSTALL IT. THIS WILL PREVENT DAMAGE TO THE TUBE AND ENGINE COMPONENTS.

        Engage the ferrule at the other end of the tube in its conical seat. If necessary adjust the tube by hand to align it, engage the nut onto its mating thread and tighten it with your fingers. Make sure that the tube is square to the rear of the nut.

      4. CAUTION

        YOU MUST HOLD THE TUBE(S) WHEN YOU LOOSEN/TIGHTEN THE CONNECTIONS. MAKE SURE THAT THE TUBE(S) CANNOT TWIST. DAMAGE TO THE TUBES CAN OCCUR IF THEY DO TWIST.

        Make sure that the tube is in the correct position. Tighten the nuts to the torque value specified the Engine Manual.

      3. Installation of tubes with clipping points.

      1. Do Step thru Step or Step thru Step to attach the tube to the engine or component.

      2. Assemble the clipping points. Refer to the applicable assembly procedures. Do not torque the attachment nuts or bolts.

      3. Make sure that the tube is in the correct position and is not under stress.

      4. Do Step or Step to tighten the tube end fittings to the correct torque value.

      5. Gradually tighten the clipping point attachment nuts or bolts to the correct torque value. Do not let the clipping point apply force to the tube.

    2. SUBTASK 70-46-03-440-002 Check the Tube Clearance

    1. Refer to Figure.

      2. Check the clearance between the tube and other surfaces.

      1. Up to 25 mm (1 inch) from the clip center line the minimum clearance between the tube and any surface must be 1.3 mm (0.05 inch).

      2. More than 25 mm (1 inch) from the clip center line the clearance must gradually increase to a minimum of 5 mm (0.2 inch) between the tube and any surface.

    3. If the clearance is less than those in Step and Step investigate the cause. Reject the tube/or the clipping point.

    3. Figure: Fig 70-46-03-990-001

    Fig 70-46-03-990-001

    Figure: Fig 70-46-03-990-002

    Fig 70-46-03-990-002

Requirements After Job Completion

Follow-On Conditions

NONE