Originally posted by Dispatch Dog
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The dispatcher is supposed to be the 'independent' authority. Used to be in my early days, but even with SQ, there was a pressure to avoid the optional fuel stop on marginal flights without offloading cargo or pax.
About 15% of SQ flights LHR-SIN were marginal and every kg of under-load was used to top the tanks before push back.
What I never did in 5000 dispatched flights was sign a loadsheet over to the pilots with anything like Evan posted on his fuel planner. We obviously had to operate at the margins but we did not bite into the safety margins. Even if the pilot requested that we increase the taxi fuel to overcome 100kgs overload, we opted to offload some cargo and re-trim, much to the disgust of the station manager.
I left LHR just as centralised load planning was becoming the norm and management attitudes were tending towards the " aircraft are so safe that we don't really need to trim and check" phase.
I have no idea what the operational organisation of this company was or any of the specifics of this flight, but I would wager that there are a lot of companies, large and small, that regularly operate outside of the limits of legal dispatch relying on the superior design of aircraft and the talents of pilots to get home.
Speak to any BA engineer at T3 LHR in the 90s and he would tell you scary stories of Asian 744s arriving on stand with less than 5 minutes fuel remaining. I think it hit the fan on a Malaysian flight once, but they were largely unreported.
I can almost picture the scene: Pilots ready to push and waiting for the loadsheet... dispatcher says that range, payload and fuel are marginal... pilots/dispatcher agree a 'fudge' to produce loadsheet (because the dispatcher wants to get home or has another flight scheduled)... pilots (or in this case THE pilot and poor inexperienced spectator) convince themselves that they'll make it as long as it all goes well... ground delays push the margins and they still convince themselves its ok, probably because they've done it before... anyway, these aircraft have huge safety margins... fuel gauges are notoriously inaccurate so there's probably loads more fuel than they are showing... we're so close, we will surley make it, but don't let anyone know how far over the limits we are...
I kinda know about this crap having landed a C152 at Stevenson Al after a 300m x-country having used most of my 'unusable' fuel (by side slipping left and right for the final 40 miles). The list of errors, inexperience, bad judgement and over-confidence is familiar to the 19 year old fresh PPL I was in those days (1981).
I learned the lesson then, but have dispatched more than a few flights with serious concerns over the judgment and over confidence of some pilots along with the company culture of "we can't afford to follow all the regulations all the time... the authorities are well aware of this... just do it".
The consequence of killing so many people is obviously not enough of a threat to many people in the industry and regulation oversight is getting more relevant today. I'm waiting for an Easyjet or Ryanair flight to come down one day, based on an ATC friend's accounts of the number of times they refuse an instruction due to fuel constraints.
These are avoidable accidents, but I would really like to know how often companies and individuals are taking avoidable risks.
About 15% of SQ flights LHR-SIN were marginal and every kg of under-load was used to top the tanks before push back.
What I never did in 5000 dispatched flights was sign a loadsheet over to the pilots with anything like Evan posted on his fuel planner. We obviously had to operate at the margins but we did not bite into the safety margins. Even if the pilot requested that we increase the taxi fuel to overcome 100kgs overload, we opted to offload some cargo and re-trim, much to the disgust of the station manager.
I left LHR just as centralised load planning was becoming the norm and management attitudes were tending towards the " aircraft are so safe that we don't really need to trim and check" phase.
I have no idea what the operational organisation of this company was or any of the specifics of this flight, but I would wager that there are a lot of companies, large and small, that regularly operate outside of the limits of legal dispatch relying on the superior design of aircraft and the talents of pilots to get home.
Speak to any BA engineer at T3 LHR in the 90s and he would tell you scary stories of Asian 744s arriving on stand with less than 5 minutes fuel remaining. I think it hit the fan on a Malaysian flight once, but they were largely unreported.
I can almost picture the scene: Pilots ready to push and waiting for the loadsheet... dispatcher says that range, payload and fuel are marginal... pilots/dispatcher agree a 'fudge' to produce loadsheet (because the dispatcher wants to get home or has another flight scheduled)... pilots (or in this case THE pilot and poor inexperienced spectator) convince themselves that they'll make it as long as it all goes well... ground delays push the margins and they still convince themselves its ok, probably because they've done it before... anyway, these aircraft have huge safety margins... fuel gauges are notoriously inaccurate so there's probably loads more fuel than they are showing... we're so close, we will surley make it, but don't let anyone know how far over the limits we are...
I kinda know about this crap having landed a C152 at Stevenson Al after a 300m x-country having used most of my 'unusable' fuel (by side slipping left and right for the final 40 miles). The list of errors, inexperience, bad judgement and over-confidence is familiar to the 19 year old fresh PPL I was in those days (1981).
I learned the lesson then, but have dispatched more than a few flights with serious concerns over the judgment and over confidence of some pilots along with the company culture of "we can't afford to follow all the regulations all the time... the authorities are well aware of this... just do it".
The consequence of killing so many people is obviously not enough of a threat to many people in the industry and regulation oversight is getting more relevant today. I'm waiting for an Easyjet or Ryanair flight to come down one day, based on an ATC friend's accounts of the number of times they refuse an instruction due to fuel constraints.
These are avoidable accidents, but I would really like to know how often companies and individuals are taking avoidable risks.
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