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 70-31-23-210-501 Procedure For Pressure Test Of Tube And Manifold Assemblies
General
It is important to apply a hydraulic pressure test to all tube assemblies and manifold assemblies after all braze or heat repairs.
This procedure is applicable to tube assemblies and manifold assemblies only.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
NONESafety Requirements
NONEProcedure
Make sure that nuts and threads do not show wear or damage that will cause damage to the part or that will not let the fixture hold the part correctly.
Make sure that mating surfaces and conical seals do not show galling, score marks, or nicks that will cause damage to the part or that will prevent a satisfactory seal.
Make sure that fixtures, hoses, and fittings are in serviceable condition.
Do a check of the test fixture and the fittings on the test fixture before you assemble the part on the test fixture.
Do not let fittings or ferrules move when you assemble parts on the fixture, or when you apply torque.
CAUTION
DO NOT USE AIR OR OTHER GASES FOR PRESSURE TESTS BECAUSE PART FAILURES CAN OCCUR IN AN EXPLOSIVE MANNER WHEN YOU PRESSURIZE WITH A GAS.Unless specified differently, apply the hydraulic pressures in the subsequent list to tube and manifold assemblies as applicable to the type of assembly:
Part
Test Pressure
Pressurized fuel tubes
1200 psi (8273.7 kPa)
Fuel, oil, hydraulic drain tubes
100 psi (689.5 kPa)
Oil pressure and scavenge lines
175 psi (1206.6 kPa)
Breather tubes
100 psi (689.5 kPa)
Air tubes
350 psi (2413.2 kPa)
Water tubes
500 psi (3447.4 kPa)
Flat tubes in inlet cases
175 psi (1206.6 kPa)
Round tubes in inlet cases
350 psi (2413.2 kPa)
Make sure that the part is filled with the water and that all the air in the part is removed.
If the tubes are part of a steel housing that will rust, use a water-soluble corrosion inhibitor solution from SPM TASK 70-38-05-380-501 Subtask 70-38-05-620-001-002 to pressurize the assembly.
Use clean potable tap water to pressurize the assembly.
Pressurize the part.
Let the pressure become stable.
Close the system for five minutes minimum.
If the part has areas that you cannot see during the test, do these steps:
Hold the applicable test pressure for a minimum of one minute.
The pressure decreases during the test.
There are leaks.
The test caused changes in part geometry, shape, or contour that do not agree with specified dimensions.
Reject all parts that show one or more of the conditions in the subsequent list:
Blow out with filtered air to dry.
Put caps on all openings.
SUBTASK 70-31-23-210-001 Pressure Test Procedure