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Instructions for Continued Airworthiness 190-01527-15 Rev 1

for the Garmin G500H Installation in Eurocopter EC130 Page 34 of 82

Section 20-10-00 Torques Maintenance Practices

1. Torque Wrenches

a) Torque Wrench Accuracy

Torque wrenches must be of good quality and calibrated at least once a year. Any torque

wrench that has been dropped or abused should be calibrated to ensure continued

accuracy.

b) Application of Torque Wrench Loads

(1) Be sure the bolt and nut and the surface they bear on are clean and dry, unless otherwise

specified by the manufacturer.

(2) Run the nut down to near contact with the washer or bearing surface and check the friction

drag torque required to turn the nut. Add the friction drag torque to the desired torque to

arrive at the “final torque” to be registered on the torque wrench indicator.

(3) Whenever possible, apply the torque to the nut instead of the bolt. This will reduce

rotation of the bolt in the hole and reduce wear.

(4) Apply a smooth even pull when applying torque pressure.

(5) If special adapters are used which will change the effective length of the torque wrench,

the final torque indication or wrench setting must be adjusted accordingly. To determine

the torque wrench setting or indication with adapter installed reference Figure 20-01.

20-10-00

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Garmin B4 Bedienerhandbuch Seite 34