Comments by "Guinness" (@GuinessOriginal) on "Taking Off" channel.

@noah8260really? That’s worrying. AD 2018-20-15 ordered a retrofit and bug fix relating to the potential loss of all AC power when to a 787 is powered on for 248+ days (integer overflow causing GCU failsafe). The DGCA said 24 of Air India's 33 Boeing 787 aircraft had completed this, it didn’t say whether this one had or not which is telling. I wonder if they’re . Can you remember when those 2 days were?
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@shanewoods1980 engineer and pilot here. The Airworthiness Directives relating to the potential loss of all AC power due to an aircraft being powered on for 248+ days (integer overflow causing GCU failsafe) should have been rectified under AD 2018-20-15 by the end of November of 2019. For those not in the know, Airworthiness Directives are mandatory. Similar ADs relating to software bugs have occurred in other aircraft such as the A350, but pertaining to the 787 specifically include AD 2020-20-09 and AD 2020-06-14. Another AD relates to water leakage into the E&E bay. The Directorate General of Civil Aviation (DGCA) said on Tuesday 24 of Air India's 33 Boeing 787 aircraft had completed AD 2018-20-15. It did not say whether this aircraft was one of them. Shockingly, none of the media have picked this up, and I can only assume this is due to interference, since this was a major overhaul of the electrical systems software (think Y2K) that should have been completed in 2019
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@crooney82 the software running the engines and the electrical systems are the same in both, therefore if there’s a software bug that’s time/parameter dependent, it’s likely to hit them both at the same time. There’s an argument that true redundancy would entail separate software each engine and electrical system independently, but of course that would increase software costs at a time when Boeing are doing everything they can to drastically reduce them
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@markcity1343 you are incorrect. There have been numerous cases of software glitches appearing after 10 or 15 years in service. For example, in 2019 an ANA 787 had an unexpected dual engine shutdown just before landing, activated by a system called the TCMA (Thrust Control Malfunction Accommodation), intended to shutdown runaway engines on the ground. Its logic should only activate it on the ground with weight on wheels if it senses the thrust lever is at idle but the engine is not. In this case, a software glitch caused it to malfunction. There are many other examples of these glitches on the 787 and other aircraft
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@SinergiaAlUnisono yeah I thought that. They’re claiming that the dust cloud was nothing but it didn’t look like nothing and I’ve not seen other planes take off from that airport do the same. Cover up maybe
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@joeg5414 this is definitely an issue, more so at high altitudes and in space, very hard to shield against. A lot less common than software bugs though (remember MCAS? That was just a fatal one nobody caught in time. There’s been plenty of near misses)
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@pcbondart they also save lives. The problem isn’t computers; it’s using cheap, inexperienced developers thousands of miles away from the engineers and in a completely different time zone and culture. This is fine for website development; not for avionics software
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@markcity1343 right, it’s a feature to retract the flaps in the middle of a take off when there’s no reverse thrust. Only an eegit would swallow that corporate BS. Why did an AD get issued for it then dumbo?
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@lumailisa it wasn’t $115k, it was 115k rupees (about $1.5k)
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@kelzangjinpa962 lol. Tata is corrupt af and has a very lax attitude to Heath and safety l
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@artgreen6915 yes because Boeing have never covered their asses by putting pressure on people in closed doors meetings before 😂
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@KevinAlvarado-n2u and who are you? Some random Indian? There’s a billion others like you mate, you’re irrelevant
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⁠ @lisahicks8186 it’s a good bet that planes with excellent cabin maintenance have even better engine maintenance, and planes with poor or non existent cabin maintenance have inferior engine maintenance. First place I go to in a restaurant and hotel is the toilets. If the toilets are pristine and top quality, it’s a good bet the kitchen and food will be too. If the toilets are awful, I wouldn’t bet on the kitchen being too pristine
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