SECTION I IDENTIFICATION AND DESCRIPTION

TB 9-4920-367-35

SECTION I

IDENTIFICATION AND DESCRIPTION

This bulletin provides instructions for the

1. Test Instrument Identification.

calibration of Spar Blade Checking and Filling Unit and Spar Blade Checking Unit,

Sikorsky, Part Numbers S1670-15000-25 and S1670-15002-2. The manufacturer's manual

was used as the prime data source in compiling these instructions. The equipment being

calibrated will be referred to as the TI (test instrument) throughout this bulletin.

a. Model Variations. None.

b. Time and Technique. The time required for this calibration is approximately 2

hours, using the physical technique.

2. DA Form 2416 (Calibration Data Card). Forms, records, and reports required for

calibration personnel at all levels are prescribed by TB 750-25-1. DA Form 2416 must be

annotated in accordance with TB 750-25-1 for each calibration performed.

3. Calibration Description. TI parameters and performance specifications which

pertain to this calibration are listed in table 1.

Table 1. Calibration Description

Test instrument

Performance

parameters

specifications

Vacuum

Range: 0 to 30 in. Hg

±0.25 in. Hg

Accuracy:

Pressure

Range: 0 to 20 psi

±0.25 psi

Accuracy:

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 2 identifies the specific equipment to be used in this

calibration procedure. This equipment is issued with Secondary Transfer Calibration

Standards Set AN/GSM-286. Alternate items may be used by the calibrating activity when

the equipment listed in table 2 is not available. The items selected must be verified to

perform satisfactorily prior to use and must bear evidence of current calibration. The

equipment must meet or exceed the minimum use specifications listed in table 2. The

accuracies listed in table 2 provide a four-to-one ratio between the standard and TI.

5. Accessories Required. The accessories listed in table 3 are issued as indicated in

paragraph 4 above and are used in this calibration procedure. When necessary, these items

may be substituted by equivalent items, unless specifically prohibited.