Why does part 135 require a maintenance log on board the aircraft, but part 91 does not? During a dispute within friends, it came to my attention that in 135.65 the maintenance log copies must be present in the aircraft, and that 91.407(b) and 91.417(c) have similar rules, but, meanwhile, as indicated in 91.203 the &quot;maintenance logs&quot; are not necessarily maintained and be present in the aircraft. Why is this?
Why didn't a school provide the maintenance logs in the aircraft, but only the airworthiness certificate?
I don't understand the reason behind this; if it must be present in the aircraft for 135 operations (air taxi) why it is not present in 91 operations? Safety wise speaking, I think any pilot who commands a plane, abused by many different people, would want to know what was in the maintenance logs?
I tried to understand the reasoning: maybe the regulators think that it will create another responsibility for PIC? Or maybe this added responsibility will diminish the part 91 owner/operator responsibility? If anybody can explain the underlying rationale for the legislation ıt will be great.
For the same reason truckers are required to keep logs in their trucks noting rest times, inspections, etc. but private vehicle owners do not. Part 135 is for commercial operations, part 91 is not.