Working backwards from what we do know which is that, MH370 WAS apparently crippled by massive electrical failure in the Left AC Generator Main Bus Relay[1] making it unresponsive before 18:25 UTC. We know because the SDU (or satellite antenna controller) was also powered from the LEFT AC BUS Relay .

https://www.atsb.gov.au/media/5733804/Bayesian_Methods_MH370_Search_3Dec2015.pdf

Evidence of Multiple electrical faults on preceeding flight MH371

Some Insights from the Unredacted Satellite Logs

Prior to operating flight MH370 THE SAME AIRCRAFT 9M-MRO experienced a number of satellite log on requests which were not preceded by log off requests. This suggested intermittent electrical faults happened well before the aircraft took off as MH370.Maintenance messages were generated after MH371 landed in Kuala Lumpur. However, no ACARS maintenance messages were generated during that flight. [2] Oddly a number of normal ACARS signals sent by MH371 were sent via the Low Gain Antenna which are powered on a Boeing 777 from the Right AC BUS relay. Worth noting is that the high GAIN Antenna requires position data from the ADIRU (Air Data lnertial ReferenceUnit )in a BOEING 777 pairs OF ADIRU are located in Left or Right AIMS cabinets powered respectively from Left or Right AC buses. These AC BUSES THEN FEED POWER TO TWO Transformer Rectifier Units, or TRU/AIM cabinet which convert AC to DC to power respective DC buses.DURING THE PERIOD when MALAYSIAN authorities claim their radar tracked MH370 navigating waypoints in the Malacca Straits. these aims cabinets were unpowered & thus unable to navigate from IGARI TO WMKPP VAMPI & MEKAR.

ACARS signal behaviour in flight MH371 Prior to the aircraft operating MH370 raise valid speculation the aircraft was already experiencing intermittent in flight power failures in the preceeding flight

LIKELY CAUSES

In simple terms facts suggest an under performing Left engine generator blew half the fuses. Then as pilots turned back the CABIN PRESSURIZATION ASCPC system which is controlled electronically shut down without issuing SPECIFIC warning to pilots causing hypoxia. as MH370 flew back accross Malaysia.

UNBALANCED GENERATOR LOAD

I surmise The most plausible reason why this situation started is during Left engine start pilots were slow to bring up N2 RPM ON the gigantic Trent 892 engine causing the IDG generator to be too slow coming up to speed at engine start & producing below adequate voltage or below normal Amperage out of phase with 50 Hz power already produced online from the APU OR Right engine. My comments are loosely based on a fire & electrical failure on a Boeing 777 in 2007.

Aircraft Accident Report 2/2009 - Boeing 777-222, N786UA, 26 February 2007

In such a circumstance with unbalanced current the BOEING 777 has a design tolerance to ignore the fault for up to 16 minutes before there would have been a load trip, shutting down the entire L AC bus relay. Just long enough perhaps to reach IGARI before all hell broke loose. Apparently something similar also happened to United Airlines flight UA201 FROM Hawaii to Guam. in July 2014.information released about that incident ranges from vague to non existant.

[10 July, 2014] UA201 (HNL-GUM) Diverts to Midway Atoll Due to Smell of Smoke Onboard

MH370 Similarities with United Flight UA201:

UA 777 diverts to Midway with fire [Archive]

Another United BOEING 777 in 2007 Suffered extensive fire in the MEC & ELECTRICAL Shut down after MEC cooling fans shut off. at Heathrow airport after push back start

ASN Aircraft accident Boeing 777-222ER N786UA London-Heathrow Airport (LHR)

ON United 201 it was delayed at the gate with extensive unspecified electrical faults. after it finally took off LATE there was a relay tripped in the air then the MEC COOLING FANS shut down, the cockpit lost instrumentation and the cabin filled with smoke. fortunately a vigilant crew descended to low level and staggered into a disused airport on MIDWAY island with smoke in the cockpit.

Guam-bound United Airlines flight diverted to Midway

[1] DSTG REPORT:https://www.atsb.gov.au/media/5733804/Bayesian_Methods_MH370_Search_3Dec2015.pdf

rest in peace Ari

[1][https://www.atsb.gov.au/media/5733804/Bayesian_Methods_MH370_Search_3Dec2015.pdf ]