AUtopilot

This is a public forum for 737 maintenance related questions, requests and experience exchange discussions for every Boeing 737.


AUtopilot

Postby SKK » 17 Jul 2016, 13:47

SCNARIO

Condition

# 1. A/P (A) Engaged
# 2. With pitch mode LVL CHG or VNAV ENGAGED & Roll mode LNAV or HDG SEL engaged
# 2. Now with little force applied Autopilot DISENGAGES instead of reverting to CWS (p) or CWS (r). Which should not happen.


Can anyone help to tell why is this happening as it is completely opposite to FCOM or AMM information.
SKK
 
Posts: 14
Joined: 12 Apr 2013, 13:05

Re: AUtopilot

Postby SKK » 07 Aug 2016, 07:42

no takers for this
SKK
 
Posts: 14
Joined: 12 Apr 2013, 13:05

Re: AUtopilot

Postby slacker » 10 Aug 2016, 20:01

Ok, I will try and help if I can. Some things that will draw a response might include what type of 737, NG, Classic. What types of bite checks you have done, I might want to know if a DFCS bite showed anything. Which axis of force is being applied, pitch, roll or both. Anything you may have read that confused you, that would be nice to know. General and vague question are no fun for some people to ponder, details makes it more fun to play in the game. I may just be speaking for myself, I don't know, try it out and see what you get.
slacker
 
Posts: 52
Joined: 14 Aug 2012, 06:57

Re: AUtopilot

Postby SKK » 27 Dec 2016, 00:17

Both pitch & roll as per AMM 10lbs of force. Type NG DFCS bite does not show anything. Sorry, for delayed reply....
SKK
 
Posts: 14
Joined: 12 Apr 2013, 13:05

Re: AUtopilot

Postby slacker » 28 Dec 2016, 01:14

Are you still having the problem? Has anything been changed? Running off the top of my head, I would do some DFCS library tests on the Mode Control Panel and if you have a spare available I would like to swap it out and see what happens. I don't have a system schematic in front of me, but the MCP seems common to all things you list. Let me know if the problem is still active and I can dig into some books when I get time.
slacker
 
Posts: 52
Joined: 14 Aug 2012, 06:57

Re: AUtopilot

Postby SKK » 31 Jan 2017, 13:16

Yes problem is still existing no change in status
SKK
 
Posts: 14
Joined: 12 Apr 2013, 13:05


Return to - 737 technical questions & requests -

Who is online

Users browsing this forum: No registered users and 11 guests

cron