A37575
2nd Jul 2011, 12:50
During recent training in a B737-300 flight simulator, both engine driven generators were switched off to simulate loss of both engine driven gens prior to practice instrument flying on standby instruments. In this particular simulator, this leaves among other things, the standby ADI (with ILS needles), altimeter and ASI. Also the captains RMI and No 1 ADF. The Vol 2 shows which systems are not available.
It was noticed that despite the first officer's RMI being inoperative as published, the No. 1 ADF needle on that instrument worked normally but with relative bearings. If the captain's No. 1 ADF frequency was changed to bring up another NDB and it's needle pointed to the new station, the first officer's RMI needle also pointed in the relative direction.
My understanding was that no ADF information is available to the first officers defunct RMI. In other words, only the captain's No 1 ADF works normally.
Of course it may have been a simulator defect or even a company option.
Appreciate opinions.
It was noticed that despite the first officer's RMI being inoperative as published, the No. 1 ADF needle on that instrument worked normally but with relative bearings. If the captain's No. 1 ADF frequency was changed to bring up another NDB and it's needle pointed to the new station, the first officer's RMI needle also pointed in the relative direction.
My understanding was that no ADF information is available to the first officers defunct RMI. In other words, only the captain's No 1 ADF works normally.
Of course it may have been a simulator defect or even a company option.
Appreciate opinions.