It seems important that the FAA standards only apply, not TWA SOP's for the rest of us.
The FD's we had in our 737's at Aircal were pretty worthless as were the autopilots for approach. Sometimes the autopilot didn't work and another day the FD going to ONT stuck in pitch down and my FO got low and told her to level out below 1,000 feet and she insisted by staring at the FD saying she was high so said look out the window at the runway angle. Of course she blamed it on the FD sticking and stomped off after landing because it wasn't her fault the FD stuck. Glideslope obviously was not part of her crosscheck.