GACFaja

And WTF is up with the zeros getting bronze stars and the smelly little E's getting a commendation medal with valor? A international incident like this really warrants more than a crappy little commendation medal.

Dan

And for the maintainers...nothing. I know the maintainers that were on that mission and they received nothing.

Another puzzler: what tech data would we use to remove/install the rescue equipment bins, forward (and above) the Benson tank on an HC-130P? I had hope when I found them mentioned in the 25GS-00-1...but there's no corresponding procedure in the 25JG-00-1. Got an LSET hitting here in less than 2 weeks and I get the feeling that the 1-1A-8 and the 1C-130H-4-25-1 ain't gonna cut it.

Thanks!

Dan,

Only 3 EC-130E aircraft were involved in the operation, 62-1809 Republic 4 (destroyed) - 62-1818, Republic 5 and 62-1857, Republic 6 (last aircraft out).

There is not an April that passes that I don't remember these guys, real American Heroes!

Check out this site: http://www.arlingtoncemetery.net/joelmayo.htm

I was in the 42nd ACCS when they closed the unit. 1818 went to the boneyard; not sure where 1857 went.

Steve, I can't imagine a time when an approximate RPM would be useful at all. So we are in agreement, the Tach Generator could not read 100% given the higher drive RPM? Has anyone ever used the Tach Generator on the front side of the SSC, and is that what the pad on it was designed for?

I've only ever had to do that once, and we definitely had to splice in more wire to do it. I don't remember it affecting the indication any, though.

I assume the trim tab is trying to drive the aircraft back and not actually causing the condition.

If I'm thinking right, if the aircraft starts to pitch up, the trim tab should go up, trying to force the elevator down. Is that what's going on?

I never did see anything after I posted something about the servo clutch. Have you changed that out, and not just swapped the servo?

The drum/bracket assy was changed out, but didn't help matters. I'm trying to get hold of the 7 lvl who flew with the acft (he's in ISO now) but I doubt he'd remember which way the trim drove. Maybe I can get the FE to watch the trim indication on the next inflight op check.

Duplicate post--can't delete it?

Zak,

GACFaja,

Does the aircraft porpoise in all modes, and at all times?

Yep. AP1/AP2, basic autopilot, and Altitude Hold. She's been doing this since she came to us from Patrick in '02 or early '03. It starts oscillating, small at first, then worse...almost like it's missing the servo feedback. No associated bit faults, wiring Ohm's out great, op checks great on the ground. We write it up for an inflight check and she fails every time. We've gotten it to go away for as much as 6 months by changing the elevator pack. A 7-lvl flew with the aircraft--when the aircraft would porpoise the elevator trim indication would follow the porpoising, which it should since the autopilot uses the elevator trim to assist the surface. If the crew put an OPPOSITE input to the flight controls the porpoising would null out and stop for a while.

Getting to the point of calling for a depot team. Or putting a grenade in the drybay.:D

Thanks for the suggestions! We're gonna give it a try--I'll keep you posted on the results.

Good morning!

We have a P model here that has a recurring porpoising issue with its AN/AYW-1 Autopilot. This aircraft has had a history of this for several years and in that time the elevator servo has been changed several times, numerous processors, air data sensor has been changed a couple of times, cable tensions checked/adjusted to the elevator servo, and at least two elevator boost packs. We have wrung the wiring out multiple times and also checked all the grounds for corrosion/paint, since another unit had a similar problem caused by painted-over grounds. The elevator trim relays were changed before the aircraft went into depot last year and the aircraft flew good for a few months and then the problem came back prior to its depot input. We got the aircraft back from depot a few months ago and the problem is still there. The TOPS panel shows no faults associated with the porpoising and we have also checked the wiring between the servo and processor, checked the ADS signals/wiring, and the MBIT 2 (ADS #1) and MBIT 19 (Elevator Sero Hyd) pass every time along with the full system operational checkout.

Has anyone seen anything like this? I'd welcome any suggestions. Thanks!