Go Back  Airline Pilot Central Forums > Pilot Lounge > Safety
Stalls with the AP engaged >

Stalls with the AP engaged

Search
Notices
Safety Accidents, suggestions on improving safety, etc

Stalls with the AP engaged

Thread Tools
 
Search this Thread
 
Old 12-04-2012, 08:36 AM
  #1  
Gets Weekends Off
Thread Starter
 
USMCFLYR's Avatar
 
Joined APC: Mar 2008
Position: FAA 'Flight Check'
Posts: 13,837
Default Stalls with the AP engaged

I was just discussing AC 120-109 and this article ( Stall Training Issue Addressed by FAA, Aviation Industry | Aviation International News )
with a fellow pilot and we got into a discussion of the stall training during our intial and recurrent checks.
He mentioned that at a recent training event at Simuflite for the L60, the instructor had them training for recovery from stalls with the autopilot engaged and you recovered when the autopilot first disengaged (not to the sticker shaler or fully developed stall). I've only been to this type of training twice (1 initial and 1 recurrent for the King Air), but have not seen this approach to the training.

After our discussion I came across this paragraph from the article linked above:
"The AC goes into much more detail on how training providers should update their stall training procedures, but two emphasized items are worth examining further. In one, the FAA discusses “abrupt pitch up and trim change commonly associated when the autopilot unexpectedly disconnects during a stall event. This dramatic pitch and trim change typically represents an unexpected physical challenge to the pilot when trying to reduce AOA. In some airplanes, this may be exacerbated by an additional pitch up when the pilot increases thrust during stall recovery.” This is the conspiracy of factors for not only the Colgan accident but also the February 2005 Circuit City Cessna Citation 560 crash, in which pilots failed to add power after leveling off during an approach. (The NTSB seemed more concerned with icing in the Citation accident, but the level-off without power and the autopilot disconnect during the stall were factors in both accidents.)"
This would seem to be directly related to some of the related auto-pilot / stall mishaps"
I recently watch a program called 'Air Diasters' which features a mishap of West Carribean Airlines Flt 708 which is the same type of stall at cruise scenario which was also mishandled by the crew who did not recognize that they were actually in a full stall yet kept full backstick in until impact.
West Caribbean Airways Flight 708 - Wikipedia, the free encyclopedia

I guess my question to the forum would be are you seeing this type of set-up during your training/recheck events and are training providers / check airmen still focusing on minimal altitude loss?

USMCFLYR
USMCFLYR is offline  
Old 12-04-2012, 10:01 AM
  #2  
Gets Weekends Off
 
Senior Skipper's Avatar
 
Joined APC: Jan 2008
Position: the correct seat
Posts: 1,422
Default

We do initial entry into the maneuver with the AP. Our training dept. still wants us to maintain altitude though.
Senior Skipper is offline  
Old 12-04-2012, 11:54 AM
  #3  
Gets Weekends Off
Thread Starter
 
USMCFLYR's Avatar
 
Joined APC: Mar 2008
Position: FAA 'Flight Check'
Posts: 13,837
Default

I go to recurrent again next week. I'm not expecting to fly into the entry on the AP but at least I won't be surprised now if it were briefed.
As for the expectations on stall recovery - that is disappointing since this AC has been around for 6 months or so.
Anyone else?

USMCFLYR
USMCFLYR is offline  
Old 12-04-2012, 12:37 PM
  #4  
Gets Weekends Off
 
TheFly's Avatar
 
Joined APC: Feb 2006
Position: Seat 0B
Posts: 2,300
Default

minimal loss
TheFly is offline  
Old 12-04-2012, 01:55 PM
  #5  
Gets Weekends Off
 
Joined APC: Aug 2009
Posts: 396
Default

We do stall training with the AP engaged both in the simulator and in the aircraft in the Lear 60. The AP disengages early in this aircraft so it's really more of a stall avoidance maneuver than a stall recovery. I usually do the AP stalls in a turn when in the aircraft to amplify the pitch changes.

In the last year as others have said the FAA has changed it's criteria for recovery, basically saying you may need a significant AOA reduction to recover correctly, as shown in the AF447 accident. We do this in the sim with high altitude stalls, where power available is significantly less and you must unload the wing to recover
PW305 is offline  
Old 12-04-2012, 07:39 PM
  #6  
Gets Weekends Off
 
LowSlowT2's Avatar
 
Joined APC: Aug 2011
Posts: 484
Default

I've long said the "approach to stall" recovery training with no/minimal altitude loss was a bad idea. Good to see the FAA finally reverse their stance and go back to full stall recovery.

I saw this AC several months ago and brought it to the attention of my training dept - haven't heard what guys are doing in recurrent yet, but I expect to go in a couple months, so we'll see.
LowSlowT2 is offline  
Old 12-04-2012, 07:43 PM
  #7  
Gets Weekends Off
 
KC10 FATboy's Avatar
 
Joined APC: Jun 2007
Position: Legacy FO
Posts: 4,096
Default

Previous company. We did stalls the old fashioned way, max relax roll. They also demonstrated a stall while on the ILS with the autopilot on and autothrottles off. The procedure was just push the throttles up at the first sign of an impending stall. The aircraft recovered nicely. Stalls were not part of the line check in the sim.

Current company. Stalls were part of the check and you could only have 100 feet of altitude gain or loss. Autopilot was off. Included a takeoff, traffic pattern, and final approach configuration stall.
KC10 FATboy is offline  
Old 12-04-2012, 08:24 PM
  #8  
Banned
 
Joined APC: Aug 2011
Posts: 1,134
Default

Originally Posted by USMCFLYR View Post
I guess my question to the forum would be are you seeing this type of set-up during your training/recheck events and are training providers / check airmen still focusing on minimal altitude loss?

USMCFLYR
Originally Posted by USMCFLYR View Post
Anyone else?

USMCFLYR
Do 2 types of stalls with the AP on;

1) In high alt cruise. Takes a pretty (relatively) long time with a few thousand feet to recover.

2) On an approach.

In both cases, I believe it's with "minimal loss of altitude". But the training department stresses recovering aircraft control and speed above all else. IOW, as long as the plane doesn't crash or you didn't make the situation WORSE they don't seem to care about altitude loss.
.
Which is light years ahead, as well as more realistic than the old/outdated PTS of stalls that were taught to have little, if ANY alt loss and didn't really do much to train stall recovery.

Originally Posted by KC10 FATboy View Post
Previous company.....

.........Current company.
You get the FX job or what?
xjtguy is offline  
Old 12-05-2012, 02:19 AM
  #9  
Gets Weekends Off
 
Twin Wasp's Avatar
 
Joined APC: Oct 2007
Position: Sr. VP of button pushing
Posts: 2,730
Default

Current job has been stalling with the autopilot on since at least 08. Ignore the airspeed tape turning yellow and the AIRSPEED LOW EICAS, wait for the shaker. They've lightened up on the altitude loss in the last couple years.
Twin Wasp is offline  
Old 12-05-2012, 05:59 AM
  #10  
Working weekends
 
satpak77's Avatar
 
Joined APC: Jul 2005
Position: Left Seat
Posts: 2,384
Default

guys what about entries. I have been at FSI a few times where they nickel and dime the entry procedure and sometimes seem to care more about that then they do the recovery. "hold altitude, ok you gained 100 feet, lets hold altitute, watch your speed, let it bleed off, center the ball ! center the ball....hold altitude". uh ?

my opinion the plane can stall itself (well, if allowed to do so....), and the recovery is much more important
satpak77 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
withthatsaid182
Flight Schools and Training
24
04-27-2009 01:34 PM
jsfBoat
Flight Schools and Training
6
04-21-2009 11:14 AM
mcartier713
Flight Schools and Training
20
09-26-2007 07:55 AM
HIREME
Regional
23
06-11-2007 08:40 AM
Longbow64
Flight Schools and Training
10
04-22-2007 06:38 PM

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



Your Privacy Choices