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STEC Servo
Chasing phantoms in my plane again. STEC 60 would not hold heading. Avionics shop sent out the main computer and found nothing wrong with it. Next step is to look at the servo. Maintenance shop was asking me where the servo is located and I don't know which wing it is in.
Thanks
Richard Lanning- Posts: 65
- Joined: Tue Apr 15, 2014 11:08 pm
- Location: South Florida
Re: STEC Servo
Kristin Winter- ICS member
- Posts: 1299
- Joined: Tue Aug 09, 2005 5:21 pm
- Location: Northern California
Re: STEC Servo
Thanks. I just don't want the avionics guy spending hours trying to find the thing.
Richard Lanning- Posts: 65
- Joined: Tue Apr 15, 2014 11:08 pm
- Location: South Florida
Re: STEC Servo
- Charles
Charles Schefer- Posts: 563
- Joined: Mon Mar 12, 2012 7:09 pm
Re: STEC Servo
This is the log entry:
Removed S-Tec 0111 altitude module for testing. Put unit on bench and supplied plus 10 VDC and tested module for stable and proper output. Verified module appears to work correctly. After reinstalling Altitude Module, installed S-Tec Break-Out box in aircraft for testing of a/p system. Found + 10 volts DC output from pitch computer to altitude module is good, tested voltage at module, found altitude variable input to Pitch Flight Guidance Computer good at computer, Tested for proper 14 Volts DC power at Both Pitch and Roll computers, tested for proper grounds at both pitch and roll computers found ground connections were loose , tested for proper Regulated 10 volts DC from both pitch and roll computers to Mode controller, tested good. Tested Pin tensions in Pitch Flight Guidance Computer rack Found several loose pins and replaced. Tested pin tensions at mode controller found several weak and replaced. Tested all interconnect wiring between A/P mode Controller and Pitch Flight Guidance computer. Tested Start voltage on Pitch Servo, found servo starts at 1.5 VDC, burnt motor in and re-tested motor now starts at 1.1 volts DC.
Ramp tested in accordance with S-Tec 60.2 Pilots Operating Handbook Part Number 8783, 2nd Edition Dated 1 November 2001 Section 4 Pre-Flight tests system passed.
Matt Bogard- Posts: 110
- Joined: Fri Jun 17, 2011 1:47 pm
- Location: Omaha, NE
Re: STEC Servo
To access the roll servo, you take out the baggage compartment floor and the servo is under the seat. Access to the servo and aileron cables is good.
Hope you got it fixed already!
Steve
Steve Marcozzi- ICS member
- Posts: 47
- Joined: Sat Apr 02, 2005 2:50 am
- Location: Frankfort, KY