Certo che da come viene spiegato ci sono due tipi di sicurezza proprio per evitare uno spostamento accidentale. A pensar male non è che la manutenzione a fronte di un pezzo usurato ha fatto una riparazione volante...Jon Ostrower, di Air Current - un ottimo giornalista di settore, se posso dire - avrebbe uno scoop.
In sostanza, le investigazioni si starebbero concentrando su un movimento inaspettato dei fuel control switches.
dal suo articolo:
Air India crash investigation focuses on movement of engine fuel control switches
Data from the Dreamliner’s black box points investigators towards improper, inadvertent or intentional pilot actionstheaircurrent.com
Precipita Volo Air India diretto a Londra AI 171
- Autore Discussione kenyaprince
- Data d'inizio
Il buon Gregory riflette...
"Tuesday afternoon thoughts:
As we wait for the prelim about the Air India accident, one thing that must be considered along with the mechanical malfunction/failure and/or operational issues is “an intentional act” by one or both crew members.
Simultaneous engine shutdowns due to a mechanical malfuntion or fuel contamination is truely an unusual, and more of an unlikely event. If it holds up that the India AAIB is focused on the fuel control switches, then an intentional act must be considered. Fuel contamination is a consideration but not likely since the fuel is not drawn at the same rate. If there was a FADEC issue it usually happens to one engine but typically not both at the same time.
I have investigated several intentional act type accidents and this type of event should always be examined and considered until proven otherwise. Silkair, Egypt Air, and German Wings were intentional acts event.
If the AAIB is focusing on the fuel controls, which are only a two- position switch “Run” and “Cutoff” - those switches don’t move by themselves so if they are in the cut-off position, someone had to move them there.
This is not a conclusion - just thinkin!"
"Tuesday afternoon thoughts:
As we wait for the prelim about the Air India accident, one thing that must be considered along with the mechanical malfunction/failure and/or operational issues is “an intentional act” by one or both crew members.
Simultaneous engine shutdowns due to a mechanical malfuntion or fuel contamination is truely an unusual, and more of an unlikely event. If it holds up that the India AAIB is focused on the fuel control switches, then an intentional act must be considered. Fuel contamination is a consideration but not likely since the fuel is not drawn at the same rate. If there was a FADEC issue it usually happens to one engine but typically not both at the same time.
I have investigated several intentional act type accidents and this type of event should always be examined and considered until proven otherwise. Silkair, Egypt Air, and German Wings were intentional acts event.
If the AAIB is focusing on the fuel controls, which are only a two- position switch “Run” and “Cutoff” - those switches don’t move by themselves so if they are in the cut-off position, someone had to move them there.
This is not a conclusion - just thinkin!"