Section II. GENERAL FAULT ASSESSMENT TABLES

TM 5-4120-394-BD

Section II. GENERAL FAULT ASSESSMENT TABLES

2-4. General. This section provides an overall damage assessment procedure to evaluate the operability of individual

equipment.

a. Assessment References. The assessment procedures are designed to assure that all necessary aspects of an

ECU's capability are evaluated during the assessment process. The procedures refer you to:

(1) Procedures in this manual if a "quick-fix" is possible.

(2) The standard TM if the best repair is covered in the system TM.

(3) A higher maintenance level if access to devices or materials to do the quick-fix are available only at those

levels.

b. Procedure Content. Each procedure:

(1) Contains general information about the problem.

(2) Lists materials and/or tools required other than those commonly available to the crew, MT, and MST (If the

listed items are not available, improvise. Anything that will do the job is acceptable.)

(3) Lists the estimated number of persons needed and the estimated time required to complete the repair.

(4) States the operational limitations

caused

the

repair

action

before

experiencing

further

damage/degradation to the ECU.

(5) The third is assessment of where and how to repair the damage.

(6) Provides other expedient options you can use depending on the availability of personnel, materials, tools,

and/or time (this does not include standard maintenance procedures or recovery)

c. Procedure Index. Following each assessment procedure is an index of the procedures contained in that chapter.

If you know exactly what your problem is you can use the index to find the proper expedient repair procedure.

d. Additional Data. Additional data is contained in the Appendices.

(1) Appendix A lists references including foreign ownership of U.S. Environmental Control Units (ECU).

(2) Appendix B lists special or fabricated tools used in performing BDAR repairs.

(3) Appendix C lists Expendable & Durable Supplies and Materials that are available for BDAR repairs.

(4) Appendix D lists Substitutes Materials/Parts.

(5) Appendix E lists Training Procedures.

2-5.

Assessment Process. The assessment procedures are structured using the logic process. (See Table 2-1.)

a. Procedure Sequence. All assessment procedures follow the sequence:

(1) Visually inspect (repair, if necessary).

(2) Functionally test (repair, if necessary).

(3) Assess the performance.

2-2