It has been seen that the instrument rating of an instrument mentioned in the operating manual is different from what is mentioned in the technical manual (Not all, but few). If we disregard the typing error, what are the actual reasons accounting for this difference?
The question is not really clear to me. Can you give an example? What do you mean by a 'rating', and how do you differentiate the operating manual from the technical manual? There may simply be different specifications listed based on design vs. practical application.
Dear Steven Cooke.
This question is related to Aviation wherein the assessment of airworthiness of some instrument found to be different in Operation manuals and Technical Manual. Operational manual is used by the Pilot/Operator whereas Technical Manual is used by Maintenance Engineering/Team. The Rating of instrument means the avionics component's operating scale with tolerance limit. For more details you can refer the avionics instrument specifications issued by various avaition agencies.
Thank you.
That would indicate that any difference would be due to the intended usage. A "bench test" or maintenance criteria would likely be more stringent than the allowable tolerance in operation. WHERE such differences are observed, I would suggest that simply contacting the supplier for a clarification would give the best unambiguous answer.
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