7.2.4 Calibration Standards Flashcards
What is required for all aircraft maintenance organisations regarding precision tooling?
They must regularly inspect and calibrate their precision tooling and equipment to the prescribed acceptable standards.
What should a clear labelling system indicate?
It should indicate that the tool being used is within the calibration period, showing the date of the last inspection and the date the next inspection is due.
What information should be included on a calibration label?
The date of the last test, when the next inspection or calibration is due, and the authorised person’s signature or stamp.
What should be maintained for all precision tooling and equipment?
A register should be maintained along with a record of the calibrations and standards used.
What is the purpose of an inventory control register?
It specifies the tools that need periodic calibration.
How can tools be calibrated?
Calibration can be done in-house in a controlled testing environment or sent out to an independent test company.
What must an engineer ensure regarding tools that require periodic calibration?
The engineer must ensure that calibration is performed; otherwise, the tool is deemed not suitable for use in aircraft maintenance.
What should the interval of inspections and calibrations follow?
It should be in accordance with the manufacturers’ instructions unless a different time period is justified by results.
What is common for tools that hold calibration well?
Annual calibration is common for these tools.
How are sensitive instruments calibrated?
They are calibrated by the user before each use and also require periodic calibration.
What should a written record for tools requiring calibration include?
It should detail when the last calibration was done, when the next is due, and the calibration’s requirements.
What should be checked before using a tool?
The due date of the next calibration should always be checked, and no tool should be used if it is out of calibration.
What information should calibration records or certificates contain?
Identification of equipment, manufacturers standard used, obtained results, uncertainty of measurement, assigned calibration interval, limits of permissible error, authority of the release document, limitations in use, and the date of calibration.
What should be done if an item shows signs of damage?
It should be removed from service and labelled accordingly.
What must happen before unserviceable equipment can return to service?
The reason for unserviceability must be eliminated, and its calibration must be revalidated.
