Supply Kits, Parts, and Disposition.

TB 1-2835-208-20-2

6. Application.

a. Level of Maintenance. AVUM/AVIM.

b. Applied by. AVUM/AVIM.

c. Time Required. Not applicable.

d. Additional Information. These instructions are for use only in a sandy environment and/or during combat

operations.

7. Supply Kits, Parts, and Disposition.

a. Parts Required to Accomplished Technical Bulletin.

Nomenclature

Part Number

NSN

Barrier Filter

PSF31BH6X28

2945-01-328-9679

b. Parts Disposition. Not applicable.

c. Expendable Supplies. Not applicable.

8. Special Tools, Jigs and Fixtures Required. Not applicable.

9. Inspection Procedures.

NOTE

The T-62T-40-1 APU may be operated with the emergency barrier filter P/N PSF31BH6X28. The

barrier wrap filter shall be used to minimize engine sand ingestion in a heavy sand and dust

environment.

WARNING

Operating the APU with a clogged inlet filter can result in insufficient pressure across the APU

labyrinth seal. This will cause the seal to leak resulting in oil starvation of the APU bearings

and subsequent catastrophic failure of the unit.

a. Inspect the APU inlet screen for serviceability in accordance with TM 55-2835-208-23, Task 2-2.

NOTE

Pressure gradient across the barrier filter will cause an improperly installed (loose) screen to

collapse into the air inlet housing.

NOTE

Housing supports should be located at the 4, 8, and 12 o'clock positions.