It always amazes him why techies swear that e-data form QARs and AIMS/ACMS are the gospel truth. Years ago, a colleague had an inadvertant overspeed during descent from a warm airmass into a colder one coupled with a massive increase in headwind. It was a flight from downunder to SEL during winter where there was the ever present headwind. He reported the incident in the techlog and ASR, but the techies came out with a QAR/AIMS digital report showing tailwind and almost constant OAT!!! The safety dept declared him lax in monitoring his descent profile and accused him of deliberately increasing descent speed to get back on descent profile as he was " boosted " up above his descent profile by atmospheric factors!!! He challenged the dept. with met reports, forecast winds etc, but the techies stood their ground. He was reprimanded with no further investigation.
Later on another colleague experienced a fuel leak and informed maintenance and dispatch that he was diverting. The company tried dissuading him from diverting AS THEY CLAIM REAL TIME DATA LINK REPORTS SHOW NO ANOMALY; thankfully he stood his ground and countermanded company instructions, diverting to ANC. Flight Ops and dispatch tried to flame him for that even though a fuel leak was actually found; finally I believe some belated advice from Boeing persuaded the company to back down...the fuel leak checklist in the QRH was changed!