Jump to content

tinyclark

Members
  • Posts

    1,119
  • Joined

  • Last visited

  • Days Won

    15

Posts posted by tinyclark

  1. It is named the Pressure test fitting in the TO and I can't find any real info on using it. The old 1C-130B-2-10 shows the fitting, but the book is not specific about hooking it up. This was back in the day when knowledge was handed down. It says to use an air cart though.

    "d. Start the MA-1A and pressurize the bleed air manifold."

    Suffice it to say, it was probably put there for manufacturing purposes to check the aircraft before any power was put on it to run the GTC.

     

    image.png.08669af1f96bf22732d0788838d30e32.png

    • Like 1
  2. I would ensure the 28V is getting to the power supply on pin B, as well as the ground on pin A, which is aircraft bonded.

    Also, the ground for the transmitter and indicators are tied to one aircraft ground. Since all four are affected, I would insurepower is good to everything before I started with anything else.

     

    Screenshot 2023-02-23 215452.jpg

  3. While I appreciate the kind input of my helpfulness, it has been a while. Definitely do what n1dp said, check the altitude inputs. Antenna lines have cause very weird problems. They can be checked using a RFLTS. If the problem seems at exactly 10k feet, it really would be an altitude malfuntion. I need to look at some old books to see if there is a missing signal on one of the inputs that would cause this.

    • Like 1
  4. On 10/29/2022 at 4:53 AM, Metalbasher said:

    Anyone know the approximate timeline the USAF transitioned to the two blade antennas mounted on the vertical at the approximate same VOR antenna location?  I think the mid to late 1990s but not sure.

    Thanks

    Scott

    Late 90's or early 2000's. I know it came out when I was in Alaska, 98-01. There wasn't a TCTO issued for it that I know of, it was just used as an alternate antenna. It was mounted in the same holes that the old antenna used. It got rid of the corrosion problem caused by the copper band on the old antenna mounting surfaces. 

    • Like 1
  5. I am still looking at the books. Can't see power causing this since everything works unless the ALT Hold is set to ON.

     

    A few more questions...

    When this started 4-5 months ago, was any peculiar work done on the aircraft right before it started happening?

    Were all boxes swapped between two aircraft or from supply?

    Was the Acceleration sensor changed out? Doesn't that feed both systems? 

  6. Yes, that antenna is no longer available. The aircraft was modified using two blade antennae. The information is in 1C-130H-4-34-1, section 4 Fig 9. It may be easier to get some from a retired aircaft in AMARG. If you need more info, let me know.

    image.png.550c94e91e3514f5cfe1a4fd1e6a5b78.png

    • Like 1
×
×
  • Create New...