Hello, I was looking at a pic of the real 767 pedestal and noticed a test button on the ILS box. Is this test button pushed on the fist flight of the day? Or is this for maintenance use only? Thank you :-wave

Hi,Not sure. The ILS Box is a 3rd NAV receiver on the 757/767 specifically for the ILS Nav frequency and radial. Due to a limitation of FS only allowing 2 Nav radios, the NAV1 Radio also controls the ILS Stuff.

"The ILS Box is a 3rd NAV receiver on the 757/767 specifically for the ILS Nav frequency and radial. Due to a limitation of FS only allowing 2 Nav radios, the NAV1 Radio also controls the ILS Stuff."Here's some further info on the subject ;-)The real aircraft (767-200/300) does not allow the tuning of ILS frequencies via the VOR control panels on the glareshield. Neither does the FMC have the facililty to tune ILS frequencies. The (single) ILS control panel on the real aircraft pedestal allows the tuning of three ILS receivers simultaneously (triple redundancy required for CAT III Autoland).I don't believe the pilots use the test button, but I do ;-) It generates an ILS display sequence (flags in view for three seconds, NCD (No computed data) for three seconds, then a fly up/left (one dot) for three seconds, then a fly down/right (one dot) indication until the end of the test).Hope this helps.Cheers.Ian.

Interesting indeed! I've always set ILS on the glareshield in PIC though, if not already set by FMC.

"I've always set ILS on the glareshield in PIC though, if not already set by FMC."When I first started working on the 767 (many years ago), Preston, I thought the glareshield Nav Control panels were broken.... When I was cycling through the frequencies, every now and then, some of the digits seemed to be missing. Then I realized that the ILS frequency combinations were omitted ("odd decimals below 112MHz"). The logic for the LCD display in the control panel automatically deleted the ILS frequencies.767 FMC Pegasus modifications introduced remote tuning of Nav Radios via the CDU Nav Rad Page. However, as far as I know, only VOR tuning is available. The Bulfer manual shows that ILS tuning is available also, for 747-400, 777 and Pegasus FMC's, but I believe this to be an oversimplification (in the case of the 767). Note that the FMC can use the manually tuned (via the pedestal control panel) ILS signals for Map position updating.Unfortunately, Microsoft forces programmers to develop these workarounds (at the expense of reality).Anyway... I believe this has already been mentioned in the dim/dark past on the PIC forum.Cheers.Ian.