TASK 72-00-43-220-003 No. 4 Bearing And Rear Compartment Assembly - Examine The No. 4 Bearing And Rear Compartment For Leaks, Inspection-003

DMC:V2500-A0-72-00-4300-00A-364A-B|Issue No:001.00|Issue Date:2014-05-01

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 72-00-43-220-003 No. 4 Bearing And Rear Compartment Assembly - Examine The No. 4 Bearing And Rear Compartment For Leaks, Inspection-003

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
IAE 1P16088 Leak check adapter0AM53IAE 1P160881
IAE 1P16089 Leak check cap0AM53IAE 1P160891
IAE 6F10030 Vacuum test cart0AM53IAE 6F100301

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-43-720-001 Do a Check of the No. 4 Front and Rear Bearing Compartments for Leaks

    1. Refer to Figure

    2. Install the IAE 1P16089 Leak check cap 1 off in the coupling nut of the pressure tube.

    3. Install the IAE 1P16088 Leak check adapter 1 off in the scavenge tube.

    4. Connect the IAE 6F10030 Vacuum test cart 1 off to the adapter.

    5. Adjust the vacuum on the cart to 20 in. Hg and evacuate the bearing compartment. Based on the ambient pressure, refer to the table below for the vacuum pressure in psia.

      Ambient Pressure of the Day (psia)

      Vacuum Pressure (psia)

      14.7

      4.9

      14.5

      4.7

      14.3

      4.5

      14.1

      4.3

      13.9

      4.1

      13.7

      3.9

      13.5

      3.7

      13.3

      3.5

      13.1

      3.3

      Vacuum pressure (psia) = Ambient pressure of the day (psia) - 9.8 psia

      6. Check the air flow on the No. 4 bearing front and rear compartment.

        1. Airflow.

          1. Not more than 17 pph (7.71 Kgph)

          1. Accept

          2. Above 17 pph (7.71 Kgph) but no more than 21 pph (9.53 Kgph)

          1. Accept, if the engine has no weepage out of No. 4 oil weep tube during pass-off testing, the engine has no history since last shop visit of abnormal oil system indications (MOP, oil consumption, external oil leaks), and P4SCAV does not exceed limits during pass-off testing. Otherwise, reject

          3. Above 21 pph (9.53 Kgph)

          1. Reject

    7. Decrease the vacuum to 0 in. Hg and disconnect the cart from the fixture.

    8. Remove the leak check cap from the pressure tube.

    9. Remove the leak check adapter from the scavenge tube.

    2. Figure: Check the No. 4 Front and Rear Bearing Compartment for Leaks

    Check the No. 4 Front and Rear Bearing Compartment for Leaks

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:0AM53
Tool Number:IAE 1P16088
Tool Name:IAE 1P16088 Leak check adapter
Manufacturer Code:0AM53
Tool Number:IAE 1P16089
Tool Name:IAE 1P16089 Leak check cap
Manufacturer Code:0AM53
Tool Number:IAE 6F10030
Tool Name:IAE 6F10030 Vacuum test cart