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
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.
may be substituted by equivalent items, unless specifically prohibited.
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