Go Back  Airline Pilot Central Forums > Pilot Lounge > Safety
Good day for GPWS >

Good day for GPWS

Notices
Safety Accidents, suggestions on improving safety, etc

Good day for GPWS

Old 02-08-2018, 01:30 PM
  #51  
Gets Weekends Off
 
galaxy flyer's Avatar
 
Joined APC: May 2010
Position: Baja Vermont
Posts: 5,136
Default

Thanks, ATCBob.. Im not, even on the internet, a .65 expert.

GF
galaxy flyer is offline  
Old 03-26-2018, 12:40 AM
  #52  
Gets Weekends Off
 
Joined APC: May 2017
Posts: 258
Default Skywest

Whats your take on this Skywest flight that descended below the minimum segment altitude?

https://www.youtube.com/watch?v=FMUJnFr99rY
TCASTESTOK is offline  
Old 03-26-2018, 04:05 AM
  #53  
Gets Weekends Off
 
Joined APC: Aug 2014
Posts: 313
Default

Already been discussed

https://www.airlinepilotforums.com/safety/110739-good-day-gpws.html
Cefiro is offline  
Old 08-05-2022, 12:28 PM
  #54  
Line Holder
 
Joined APC: Apr 2007
Posts: 36
Default NTSB weighs in

https://www.avherald.com/h?article=4b3d8f81
aaatwood is offline  
Old 08-06-2022, 12:23 AM
  #55  
Gets Weekends Off
 
joepilot's Avatar
 
Joined APC: Jul 2008
Position: 747 Captain (Ret,)
Posts: 792
Default

Many, many years ago, when I was a new Captain on the 737, I was coming from SFO to LAX. Twas a dark and stormy night, and the OAT was about 4 Degrees C. We were being vectored for the ILS 24R, and told to descend to 2,500. Presumably that was MVA. Being retired, I no longer have access to current approach charts, but at the time there was a terrain feature at 1,488 feet about 15 miles on final for 24R. If I remember correctly this was actually a quarry with rapidly rising walls.

The F/O was the PF, and he was highly experienced, (ex-TWA instructor). We briefed the approach, including the 1,488 obstruction. We got a vector to about a 22 mile final at 2,500. We were cleared to intercept the localizer, and cleared for the approach. We did NOT believe that meant that we were cleared to climb to the higher altitude depicted on the approach plate for the R24R approach plate. We both knew that LAX approach routinely vectored aircraft across the 24 runways approach at 3,500.

Predictably, we got a GPWS at the quarry. I saw the rapidly rising radar altimeter going up thru 1,000, and I said simply "do it", and the F/O did as we trained. The GPWS stopped within 100 feet, so we stopped the climb before we got 200 feet off altitude. We reported the incident to ATC, but they did not seem particularly interested.

I did do an ASRS report to the FAA, and also a safety report to the company. The company did not seem interested, but the FAA did call me back. They seemed to be most interested in what repercussions may have occurred with the company. They seemed to lose interest when I said that their were no company repercussions, but that I was most concerned that their was a potential for a midair collision if somebody followed the GPWS maneuver too far, with the aircraft performing the escape maneuver climbing into a higher aircraft being vectored for a runway 25 approach.

Joe
joepilot is offline  
Old 08-06-2022, 07:35 AM
  #56  
Prime Minister/Moderator
 
rickair7777's Avatar
 
Joined APC: Jan 2006
Position: Engines Turn Or People Swim
Posts: 36,711
Default

We get in the habit of accepting ATC descents below published MORA, route, or even arrival altitudes because ATC has min vectoring altitudes which are not published for our reference.

Also ARRIVAL crossing restrictions are usually there for airspace management reasons, ex separate departures from arrivals. ATC can waive those if there's no traffic conflicts and they often do.

But APPROACH restrictions are often there for terrain clearance purposes, especially closer in. If you're actually established on the approach course, you should question any clearance to descend below published altitudes.

If given at or above, might as well just comply with published, especially in mountains on a non-precision approach


As always, maintain terrain awareness at all times.
rickair7777 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Stimpy the Kat
Kalitta Companies
77
12-03-2016 08:24 AM
Boeing Aviator
United
9
11-25-2016 12:58 PM
CaptainCarl
Trans States Airlines
10900
12-31-2015 11:54 AM
3stripes
Regional
29
02-22-2014 08:01 PM
meloveboeing
Regional
5
10-02-2010 07:47 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Thread Tools
Search this Thread