PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
Search: Posts Made By: Graybeard
Showing results 1 to 20 of 20
Search took 0.00 seconds.
Forum: Rumours & News
20th Dec 2011, 21:39
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

I read the report, and made notes. It lacked. ...

I read the report, and made notes. It lacked. Nowhere did the author distinguish between the gravity of an annunciated failure, and an undetected error, which was the case with the radalt.
...
Forum: Rumours & News
5th Aug 2010, 03:17
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

The radio altimeter indication was not a failure,...

The radio altimeter indication was not a failure, as in flagged invalid, but erroneous altitude with no indication it was invalid. That is quite different, and most disturbing.

Engineers at the...
Forum: Rumours & News
9th May 2010, 16:19
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

No, a serviceable RA may have just delayed this...

No, a serviceable RA may have just delayed this crew's accident to another day, another situation.

Radio Altimeters, ILS receivers, and IRUs, being part of a Cat III autioland system, are...
Forum: Rumours & News
6th Feb 2010, 17:32
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Framing the Facts

PJ2

Not wanting to pick on you, PJ2, but your post was most handy. Would it not be more better to say? "For whatever reason, the salient fact here is, over a time period of 100 seconds, the...
Forum: Rumours & News
6th Feb 2010, 03:48
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Thanks, PJ2. I wasn't trying to critique the...

Thanks, PJ2. I wasn't trying to critique the crews as much as seeing a reason to rethink the autopilot that fails to preserve energy in the rare case of insufficient power - for whatever reason....
Forum: Rumours & News
5th Feb 2010, 23:04
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

With insufficient power, you sacrifice altitude...

With insufficient power, you sacrifice altitude rate or airspeed. If you're already near the drag bucket, which should be on the order of 1.3 Vs, sacrificing airspeed to maintain glideslope will...
Forum: Rumours & News
5th Feb 2010, 13:27
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Autopilot Pitch Trim

Should pitch trim be allowed to continue to run nose up when below bug speed, just to stay on the glideslope?

Sure, the THY crew had stall protection in the form of shaker; that's a bit late...
Forum: Rumours & News
23rd Sep 2009, 15:18
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

I heard once that Eastern Airlines (US) had 13...

I heard once that Eastern Airlines (US) had 13 major accidents in its lifetime. In each case, the FO was flying. They concluded the FOs were not so much to blame as the Captains who were lousy at...
Forum: Rumours & News
20th Sep 2009, 13:58
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

The LRRA mfr bears responsibility for false...

The LRRA mfr bears responsibility for false altitude with no warning flag. However, the likelihood of a defect in the installation or maintenance shifts at least some of that responsibility to Boeing...
Forum: Rumours & News
25th Jun 2009, 14:49
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

New News, Thanks

Nearly everybody posting on this thread had jumped to the conclusion that the #1 Radio Altimeter had begun indicating -8 feet only after they descended below 2000 feet on the approach. This was...
Forum: Rumours & News
11th Apr 2009, 06:15
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

And of all the lack of SA, nobody has mentioned...

And of all the lack of SA, nobody has mentioned the deck angle at vref-40. There had to be a mighty distraction.

Doesn't anybody remember the Lauda 767? IIRC, the reverser was not securely...
Forum: Rumours & News
8th Apr 2009, 15:48
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

There was a leakage path in the radio altimeter...

There was a leakage path in the radio altimeter antenna system that caused the -8 feet indication. At some point on the approach, valid ground return would have been enough to overcome the signal...
Forum: Rumours & News
24th Mar 2009, 04:27
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

I think speculation about the causes and...

I think speculation about the causes and circumstances of accidents are good. They inspire one to think about all the possibilities, tricks and traps.

One person cannot know as much as everyone...
Forum: Rumours & News
17th Mar 2009, 16:25
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

The radalt is a pretty good corrosion detector...

The radalt is a pretty good corrosion detector when it comes to that type of failure. Antenna to fuselage corrosion provides a signal leakage path direct from transmit to receive antenna; hence, the...
Forum: Rumours & News
13th Mar 2009, 14:56
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Comparator Warning Monitors, which included Rad...

Comparator Warning Monitors, which included Rad Alt, have been around since the 707 and DC-8. Does the 737 NG really lack a RadAlt comparator warning, as stated repeatedly in this thread?

GB
Forum: Rumours & News
10th Mar 2009, 14:13
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Too Many Straws

We all have heard of the straw the broke the camel's back. This appears to be another case of too many straws:

Rushed approach in IMC.

Turned onto final approach above glidepath, requiring...
Forum: Rumours & News
8th Mar 2009, 21:28
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

RadAlt Problems Noted? Quoting me in prior...

RadAlt Problems Noted?
Quoting me in prior post:

"If a sensor, such as the radio altimeter, is giving you erroneous information, you have the option to disengage its circuit breaker."
...
Forum: Rumours & News
8th Mar 2009, 18:24
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Better a Fail Warn in View than a False Indication

I'll be posting a fairly thorough explanation of the Radio Altimeter within a few days. Meanwhile, consider this:

If a sensor, such as the radio altimeter, is giving you erroneous information,...
Forum: Rumours & News
6th Mar 2009, 16:46
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Expecting Turkish, or Boeing to accept any blame...

Expecting Turkish, or Boeing to accept any blame for this accident at this time is stupid. Blame will be apportioned in accident reports and courts of law. Only then may admission of blame be...
Forum: Rumours & News
26th Feb 2009, 14:12
Replies: 2,906
Views: 1,450,462
Posted By Graybeard

Autothrottle Retard

In 1986 I was involved with a situation at a small airline with 747-200 who had a rash of autothrottle retards at about 250 feet on approach. Turns out the radio altimeters were spiking down to 0...
Showing results 1 to 20 of 20


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.