I stopped reading in the 3rd paragraph or so, when I got to this part:
'In the case of a fire, the first response is to pull the main busses and restore circuits one by one until you have isolated the bad one"
This is not the first response in large airliners. Pulling busses randomly to isolate the cause of a fire is a surefire way to cause you to plummet into the ground (or water). These are electronical, computer-driven marvels. ANY tampering with the electrics is a carefully thought-out, well-prepared and choreographed ordeal. The Boeing 777 QRH details how to handle "Smoke, fire or fumes".
1. Diversion may be needed.
2. Don oxygen masks and smoke goggles.
3. Establish crew and cabin communications.
4. IFE/PASS SEATS switch OFF (IFE is in-flight entertainment, basically turn off the TVs).
5. RECIRC FANS OFF
6. GASPER swtich OFF
7. APU BLEED AIR OFF
8. If source is obvious: isolate, extinguish and remove power from affected equipment by switch or circuit breaker.
If not obvious, go to step 10.
9. If source is VISUALLY confirmed to be extinguished and smoke/fumes are decreasing:
- Continue flight at pilot's discretions and restore unpowered items at the pilot's discretion (Blue Laser's note: "unpowered items" would be, for example, if you had to disable a bus to remove power from the source and have sense removed it from the circuit another way, you can now attempt to power on the bus)
10. Advise cabin the lighting will be switched off.
11. CABIN/UTILITY SWITCH OFF
12. INITIATE DIVERSION WHILE CONTINUING CHECKLIST.
13. LAND IMMEDIATELY IF SMOKE, FIRE or FUMES BECOME UNCONTROLLABLE.
14. DO NOT DELAY LANDING TO COMPLETE CHECKLIST.
15. C BLEED AIR ISLN SWITCH OFF
16. L PACK SWITCH OFF
17. L TRIM AIR SWITCH OFF
18. DO NOT COMPLETE PACK L or TRIM AIR L CHECKLISTS.
18. WAIT 2 MINUTES TO SEE IF SMOKE OR FUMES ARE DECREASING.
The checklist continues like this, for another 4 pages. Essentially saying, "now turn off these other handful of switches and wait another 2 minutes". At no point does the checklist say, "pull main busses". That's just not done. On small aircraft, absolutely. Flight school 101, flying a small propeller-driven Cessna or something, absolutely, the first thing you do in an electrical fire is hit your ELECTRONICS MASTER SWITCH OFF. But a Cessna 172 without electrical power still has 100% engine power, 100% flight control systems, 100% life support (or 0%, since it has no systems which is why it needs no power). The plane remains perfectly flyable. In fact, you can remove anything electrical from a Cessna 172, tell the government you did it, and STILL have them issue an airworthiness certificate for the aircraft because they aren't required systems. But a 777 is not a 172. It NEEDS electronics. Yes, there are backups and alternates and, in theory, it's "flyable" without them... But theory isn't practice. If you lose one or two of your electronic systems, you can keep the bird aloft and control the descent safely. If you lose ALL electronics, rapidly and without warning, there's a good chance you won't recover.