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Search: Posts Made By: Educated Airman
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Forum: Rumours & News
1st Apr 2019, 14:58
Replies: 920
Views: 2,316,444
Posted By Educated Airman

My theory is that the jackscrew did not fail, but...

My theory is that the jackscrew did not fail, but rather that the fuselage attach hardware for the jackscrew fell out. The picture of the jackscrew shows the hardware missing, not failed structure.
Forum: Rumours & News
29th Mar 2019, 20:03
Replies: 920
Views: 2,316,444
Posted By Educated Airman

About the loud thump heard in the CVR, the...

About the loud thump heard in the CVR, the following is from the transcript of the Alaska Air crash due to tail plane jackscrew integrity.
1619:36.6 CAM [sound of extremely loud noise] [increase in...
Forum: Rumours & News
23rd Mar 2019, 00:37
Replies: 920
Views: 2,316,444
Posted By Educated Airman

This latest discussion supports my theory of the...

This latest discussion supports my theory of the stab actuator jackscrew fuselage attach bolt falling out. As the bolt worked its way out to the point where only the threads were engaged with the...
Forum: Rumours & News
16th Mar 2019, 03:11
Replies: 920
Views: 2,316,444
Posted By Educated Airman

The hinge line is aft of the center of lift, but...

The hinge line is aft of the center of lift, but forward of the planform area center. Once the stab stalls out, the air force on the top of the surface will push the stab back to a stab nose down...
Forum: Rumours & News
16th Mar 2019, 02:51
Replies: 920
Views: 2,316,444
Posted By Educated Airman

Having experienced a severe windshear that was...

Having experienced a severe windshear that was some what anticipated in cavu on approach to Sedona Arizona, I can tell you that it is instinctive to push the yoke and throttles when the nose drops...
Forum: Rumours & News
15th Mar 2019, 20:10
Replies: 920
Views: 2,316,444
Posted By Educated Airman

I am still thinking about the missing bolt on the...

I am still thinking about the missing bolt on the horizontal stab actuator theory. If this happened the stab would most likely have moved beyond the design limits and could possibly have caused...
Forum: Rumours & News
11th Mar 2019, 14:39
Replies: 920
Views: 2,316,444
Posted By Educated Airman

I noticed the jackscrew attachment lug appears to...

I noticed the jackscrew attachment lug appears to be intact without the bolt in it. Attachment hardware is usually designed to be stronger than the structures they are installed in. I would have...
Forum: Rumours & News
9th Mar 2019, 22:43
Replies: 920
Views: 2,316,444
Posted By Educated Airman

I used to fly skydivers in an old Cessna 182 that...

I used to fly skydivers in an old Cessna 182 that used stab trim. The only "locking" device for the jackscrew was the ball and spring detents on the trim wheel. The pivot point was at the aft spat...
Forum: Rumours & News
5th Mar 2019, 18:09
Replies: 920
Views: 2,316,444
Posted By Educated Airman

jackscrew obsevations

I am a commercial pilot and A&P and was an inspector at a major repair station with a B.S. degree in Aeronautical Science. We did freighter conversions on Boeing 727s that had been pulled out of...
Showing results 1 to 9 of 9


 
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