TASK 71-00-00-700-070 Functional Test Of The P4.9 (P5) Sensor System, Testing-070

DMC:V2500-A0-71-00-0000-07A-340A-B|Issue No:003.00|Issue Date:2015-05-01

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 71-00-00-700-070 Functional Test Of The P4.9 (P5) Sensor System, Testing-070

General

Use this procedure to leak check and flow check the P4.9 (P5) system for leaks and obstructions.

There are three P4.9 (P5) pressure sensing systems located in the turbine exhaust case (TEC) struts numbers 4, 7 and 10 (located at the 3, 6 and 9 o'clock) respectively, aft looking forward. Refer to Figure.

NOTE

Gage accuracy must be within 10 percent. The equipment must have a functioning isolation shutoff valve in order to isolate the P4.9 (P5) system from the pressure source.

NOTE

To identify the consumable materials, refer to the PCI.

NOTE

This test cannot detect internal leaks in the P4.9 (P5) sensor system.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Reducer fitting: AN6-AN4LOCALReducer fitting: AN6-AN4

(commercially available hardware)

Portable gas sourceLOCALPortable gas source

Regulated Air or Nitrogen gas, 0 to 30 psi (0 to 308.1 KPa) IF AIR IS USED, THE AIR MUST BE CLEAN AND DRY IN ORDER NOT TO INTRODUCE FOD OR OTHER DEBRIS WHICH CAN OBSTRUCT THE NORMAL FUNCTIONING OF THE P4.9 (P5) SYSTEM, INCLUDING ALL PLUMBING LINES.

Torque wrenchLOCALTorque wrench

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-141 LOCKWIRELOCALCoMat 02-141
CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE03530CoMat 10-045

Spares

NONE

Safety Requirements

CAUTION

IF AIR IS USED, THE AIR MUST BE CLEAN AND DRY IN ORDER NOT TO INTRODUCE FOD OR OTHER DEBRIS WHICH CAN OBSTRUCT THE NORMAL FUNCTIONING OF THE P4.9 (P5) SYSTEM, INCLUDING ALL PLUMBING LINES.

Procedure

    1. SUBTASK 71-00-00-790-001 Perform EPR P4.9 (P5) System Leak/Flow Check

    1. Refer to Figure and Figure.

      2. Visually examine the P4.9 (P5) sensing system for damage and/or leaks as follows:

      1. Ensure all the tube connections are not loose.

      2. Ensure that the tubes are not visibly cracked or broken.

      3. Ensure that the tubes are not chafed through at clamping locations.

      4. Ensure that the brackets which support the clamp assemblies are not cracked, broken or loose.

      5. Ensure that the P4.9 (P5) flexible line attached to the P4.9 (P5) pressure inlet port on the EEC is not damaged and/or frayed.

      6. If problems are found, correct as necessary.

      3. Connect the portable gas source as follows. Refer to Figure.

      1. Locate the end of the P4.9 (P5) flexible line which is connected to the P4.9 (P5) pressure inlet port located at the bottom of the EEC.

      2. Remove the lockwire from the B-nut fitting on the P4.9 (P5) flexible line at the EEC inlet.

      3. Disconnect the P4.9 (P5) line from the EEC P4.9 (P5) inlet.

      4. Install the AN6-AN4 reducer fitting to the open end of the P4.9 (P5) flexible line.

      5. Adjust the regulator valve on the portable gas source to 0 psig (0 KPa).

      6. Connect the hose from the portable gas source to the AN6-AN4 reducer fitting.

        NOTE

        The 30 psig (308.1 KPa) must be constantly supplied throughout the proceeding leak/flow check procedure.

      7. Supply 30 psig (308.1 KPa) to the P4.9 (P5) system via the portable gas source.

      4. Perform flow check of the P4.9 (P5) system as follows: (Refer to Figure).

      1. While 30 psig (308.1 KPa) is applied to the P4.9 (P5) system, access the turbine exhaust case (TEC) strut numbers 4, 7 and 10 (located at the 3, 6 and 9 o'clock) (aft looking foward).

      2. Place un-gloved hands over each one of the TEC struts individually and check for noticeable airflow exiting the strut at the orifices (8 locations per strut) located on the strut itself. Airflow through the strut orifices should be obvious and immediately apparent.

      3. If lack of flow is noticed in one of the TEC strut assemblies, examine the P4.9 (P5) tubing assembly for potential blockage or leaks and correct as necessary.

      5. Perform leak check of the P4.9 (P5) system as follows:

        NOTE

        Leak check fluid (CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE) should be applied all around periphery of flange.

      1. With 30 psig (308.1 KPa) applied, utilize leak check fluid (CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE) by applying to all interfacing locations on external plumbing between the portable gas source at the P4.9 (P5) flexible line and the inlet of the P4.9 (P5) sense line at the TEC.

      2. If a leak is found during this process, remove all pressure from the P4.9 (P5) system prior to troubleshooting.

      3. Resolve leaks in fittings by torquing/tightening subject fittings to limits specified in the engine manual. If leaks were found elsewhere such as in the tube body or flange interface at turbine exhaust case, isolate the leak location, and remove and replace hardware as necessary.

    2. Figure: P4.9 Flow Check and Leak Check-Connection Sequence

    P4.9 Flow Check and Leak Check-Connection Sequence

    Figure: P4.9 (P5) Sensor Strut Locations

    P4.9 (P5) Sensor Strut Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:
Change Type:

Revised format. (editorial change)

Manufacturer Code:03530
Enterprise Name:AMERICAN GAS AND CHEMICAL CO LTD
BU Name:AMERICAN GAS AND CHEMICAL CO LTD
Street:220 PEGASUS AVE
City:NORTHVALE
State:NJ
Zip Code:07647
Country:USA
Phone Number:1-201-767-7300, 1-800-526-1008
Fax Number:1-201-767-1741
Internet:www.amgas.com
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 02-141
Type:sp01
Supply Short Name:CoMat 02-141 LOCKWIRE
Supply Name:CoMat 02-141 LOCKWIRE
Specification Groups:
Doc NumberType
AS3214-02 (0.8 mm)AMS 5689
Suppliers:
ManufacturerRemarks
LOCAL
81343
IE508
58401
Manufacturer Code:03530
Supply Number:CoMat 10-045
Type:sp01
Supply Short Name:CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE
Supply Name:CoMat 10-045 LEAK CHECK FLUID, BUBBLES-TYPE
Specification Groups:
Doc NumberType
LEAK TEC 372E
Suppliers:
ManufacturerRemarks
03530
Manufacturer Code:LOCAL
Tool Number:Portable gas source
Tool Name:Portable gas source
Manufacturer Code:LOCAL
Tool Number:Reducer fitting: AN6-AN4
Tool Name:Reducer fitting: AN6-AN4
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