Preliminary Requirements

Safety Requirements

CAUTION

YOU MUST NOT KEEP THE ENGINE IN STORAGE FOR LONGER THAN THE TIMES GIVEN IN THIS PROCEDURE. THESE ARE THE MAXIMUM FOR WHICH THE ENGINE CAN BE PRESERVED.

CAUTION

YOU MUST DO ALL THE APPLICABLE PROCEDURES WHEN AN ENGINE IS PUT INTO STORAGE. IF THEY ARE NOT, CORROSION AND GENERAL DETERIORATION OF THE CORE ENGINE AND THE FUEL SYSTEM CAN OCCUR.

Procedure

1. Find the Applicable Preservation Procedure

   1. Identify the local climate conditions in which the engine is to be stored and the anticipated storage time. Compare this with Figure to Figure to get the correct procedures for Noncompliance preservation refers to Figure and Figure.

2. Prepare the Engine for Storage

   1. Refer to TASK 72-00-00-500-002 (STORAGE-002).

      NOTE

      The use of VMI bags affords maximum protection to the engine/QEC unit and must be used wherever possible, regardless of the storage environment and time period.

      NOTE

      Desiccant must be used in accordance with TASK 72-00-00-500-005 (STORAGE-005) SUBTASK 72-00-00-550-053 , and the integrity of the engine covers must be checked. Refer to TASK 72-00-00-500-005 (STORAGE-005), SUBTASK 72-00-00-210-054.

   2. Refer to TASK 72-00-00-500-004 (STORAGE-004), SUBTASK 72-00-00-620-058, Inhibit the Engine Fuel System in the Transportation Stand, will not fully inhibit the fuel system. Where possible the engine is to be inhibited on wing or in a test cell. Refer to TASK 72-00-00-500-004 (STORAGE-004), SUBTASK 72-00-00-620-060.

   3. Refer to TASK 72-00-00-500-003 (STORAGE-003), SUBTASK 72-00-00-620-056, Preservation of Mainline Bearings can only be done with the engine or QEC unit installed in a test cell or on wing. This procedure is only applicable to engines that are stored directly after a period of service operation. It is not applicable to new engines or overhauled engines.

   4. Refer to the V2500 Illustrated Tool and Equipment (ITEM) Pub.ref. ITE-V2500-1IA, for the illustrations of the special tools given in this procedure.

   5. Lubricate all threads and abutment faces of nuts and bolts with CoMat 10-077 APPROVED ENGINE OILS unless other lubricants are referred to in the procedure.

   6. Make sure that all flange faces and tool faces that touch are very clean.

   7. For standard torque data and procedures, refer to SPM TASK 70-41-01-400-501.

3. Preserve the Engine

   1. Storage for not more than 24 months:

      1. Do the applicable preservation procedures identified in Step and Figure to Figure.

      2. After 12 months of storage, open the VMI bag and replace the desiccant as per TASK 72-00-00-500-005 (STORAGE-005).

   2. The preservation counter can be reset to zero if a successful engine test is completed with subsequent preservation at any time until the 24 months storage limit.

   3. Storage for more than 24 months and not more than 36 months:

      If the engine was stored for not more than 24 months in accordance with Step, the storage time can be extended for not more than 36 months without an engine test and with the steps that follow:

      NOTE

      If the engine is sent back to service after a storage period of more than 24 months, do an inspection of the master MCD again at regular intervals as per TASK 72-00-00-500-007 (STORAGE-007). Refer to TASK 72-00-00-200-008 (INSPECTION-008) for MCD check.

      1. Make sure the storage procedure mentioned in Step was completed.

      2. Remove the engine from storage after 24 months as per TASK 72-00-00-500-007 (STORAGE-007).

      3. NOTE

         Do not do the procedures for engine fuel inhibition and main line bearing preservation.

         Do a visual inspection of the engine for signs of external corrosion. If corrosion is found, contact IAE for more recommendations.

      4. Replace the desiccant for the anticipated further storage time as per TASK 72-00-00-500-005 (STORAGE-005), SUBTASK 72-00-00-550-053. The inspection of the humidity indicators must be started with the initial frequency again as per TASK 72-00-00-500-005 (STORAGE-005).

      5. Do the preservation procedure again.

         NOTE

         Do not do the procedures for engine fuel inhibition and main line bearing preservation.

      6. If the engine has been stored for more than 24 months but less than 36 months, the preservation can be reset to zero if the following requirements are met:

         1. The engine must be stored in accordance to Step.

         2. Before performing engine testing, do a Karl Fischer as per ASTMD-6304-04ae1.

            1. Collect and analyze oil sample from the accessory gearbox prior to any oil servicing. Confirm water content is <1000ppm for continued service; if greater than 1000ppm, further action may be required. Contact IAE Tech Services.

               NOTE

               If the Karl Fischer test is not successful contact IAE Tech Services.

         3. Following the successful Karl Fischer test, do a successful engine performance test.

         4. When the engine is sent back to service after a storage period of more than 24 months, do an inspection of the master MCD at regular intervals as per TASK 72-00-00-500-007 (STORAGE-007). Refer to TASK 72-00-00-200-008 (INSPECTION-008) for MCD check.

   4. Storage for more than 36 months:

      1. Reject the engine for disassembly and detailed inspection of the No. 1, No. 2, No. 3, No. 4 and No. 5 bearing compartments and level 1 maintenance inspection of all modules as a minimum.

4. Regular Checks During Storage

   1. Check the humidity indicators regularly in accordance with TASK 72-00-00-500-005 (STORAGE-005), SUBTASK 72-00-00-230-052.

   2. Check the integrity of the engine covers regularly at the times of the humidity indicator checks, refer to TASK 72-00-00-500-005 (STORAGE-005), SUBTASK 72-00-00-210-054.

5. Accessory Removal During Storage

   1. If an accessory is removed from a stored engine, the adjacent pipe connections must be blanked using a suitable cover to prevent the ingress of dirt and moisture and prevent drainage of further inhibiting fluid.

   2. Replacement of the accessory before the end of the storage period is not required.

   3. After closure of the VMI bag or engine cover for any access to the engine, the inspection of the humidity indicators must be started with the initial frequency again, refer to TASK 72-00-00-500-005 (STORAGE-005), SUBTASK 72-00-00-210-054.

Figure: Additional Storage Requirements

Additional Storage Requirements



Figure: Off-wing Inside Preservation Procedure

Off-wing Inside Preservation Procedure



Figure: Off-wing Outside Preservation Procedure

Off-wing Outside Preservation Procedure



Figure: Nonconforming Preservation within the First 31 Days of Storage

Nonconforming Preservation within the First 31 Days of Storage



Figure: Nonconforming Preservation Greater Than the First 31 Days of Storage

Nonconforming Preservation Greater Than the First 31 Days of Storage