If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Pitot Static 411 413 followup post
Well, I finally got my plane to another place to get my .411 and 413 pitot
static / transponder check, and it went from bad to worse..... First person inspecting said everything was fine except for the VSI not being hooked into the static system. I take it to the new place (where I had it done 2 years ago) and they said my transponder altitude encoder was off, and could not be adjusted, either needs an overhaul or replacement, altimeter needs adjustment and overhaul. I am just amazed at the wide differences of opinions. My choices were, overhaul what I have, replace with an overhauled unit or a brand new transponder. This is in order of expense with the first being the lowest expense. After talking with a couple of people, I decided to go with overhaul what I got, as replacing it with another overhauled unit may be buying somebody else's problem. For the Altimeter, I kinda expected it, since it was about 40 feet off when I compared field elevation to the altimeter setting, so no surprises with that. Transponder and Altimeter sent to Wichita for the overhaul, hope to be back in the air early next week. Total cost, probably $1000.00 after all is said and done. Allen |
#2
|
|||
|
|||
A new encoder is only $160.
Mike MU-2 "A Lieberman" wrote in message ... Well, I finally got my plane to another place to get my .411 and 413 pitot static / transponder check, and it went from bad to worse..... First person inspecting said everything was fine except for the VSI not being hooked into the static system. I take it to the new place (where I had it done 2 years ago) and they said my transponder altitude encoder was off, and could not be adjusted, either needs an overhaul or replacement, altimeter needs adjustment and overhaul. I am just amazed at the wide differences of opinions. My choices were, overhaul what I have, replace with an overhauled unit or a brand new transponder. This is in order of expense with the first being the lowest expense. After talking with a couple of people, I decided to go with overhaul what I got, as replacing it with another overhauled unit may be buying somebody else's problem. For the Altimeter, I kinda expected it, since it was about 40 feet off when I compared field elevation to the altimeter setting, so no surprises with that. Transponder and Altimeter sent to Wichita for the overhaul, hope to be back in the air early next week. Total cost, probably $1000.00 after all is said and done. Allen |
#3
|
|||
|
|||
On Fri, 17 Jun 2005 03:56:36 GMT, Mike Rapoport wrote:
A new encoder is only $160. Mike MU-2 Mike, Is the encoder a separate component of the transponder? Or am I paying labor for it to be installed into the transponder? If I remember correctly, the estimate was about $400 for the overhaul of the transponder, which I thought the encoder was inside the unit? I just remember something like $600 for both, and I figured labor would jack it up to $1000. Allen |
#4
|
|||
|
|||
Bend over, grab ankles...
Next time check with the group before spending money... From my POV, the best solution would have been to purchase a new encoder (per Mike) and a new altimeter (per me - never, never, never OH an instrument that can kill you, when brand new is jsut a few bucks more!) and pay the mechanic 'one time' to pull the old and replace with the new... Then the old items can probably be sold to an instrument overhaul shop as cores, recovering a few bucks... or on ebay ;() Incidently, my encoder (ACK) older than the hills, mounted in a junker Apache, with a ham fisted, incompetent, for a pilot, was adjusted and passed the IFR check just fine a few weeks back... The altimeter was brand new... It passed the check also... denny |
#5
|
|||
|
|||
A Lieberman wrote:
I take it to the new place (where I had it done 2 years ago) and they said my transponder altitude encoder was off, and could not be adjusted, either needs an overhaul or replacement, altimeter needs adjustment and overhaul. Older encoders (especially certain manufacturers) have good days and bad days. Oddly, I'm still using the same ancient TransCal that came with my airplane (I thin this and the ASI is the only piece of original instrumetnation I have) and it's still going strong. My altimeter was progressively wonky at higher altitudes until one money hungry FBO ripped me off for a new one (and oddly the core, which I got no credit for disappeared). Particularly galling in that incident was that they quoted me a price to pull everything out and bench test it (which I've never had any other shop do). After the altimeter failed they wanted an additional $200 to put the new one in. I figured if the thing was on the bench already in the initial estimate, the only thing additional that needed to be done an extra line in the log book (which generally is covered when you pay list price for things). The only thing that I can say is that I've dissed these guys baddly enough in local forums (along with the local traffic reporting plane company owner) that we've taken a good chunk of their business away. |
#6
|
|||
|
|||
The encoder is indeed separate from the transponder. It is a little box
attached to the static system that converts pressure information to an electrical format that the transponder can understand. Mike MU-2 "A Lieberman" wrote in message ... On Fri, 17 Jun 2005 03:56:36 GMT, Mike Rapoport wrote: A new encoder is only $160. Mike MU-2 Mike, Is the encoder a separate component of the transponder? Or am I paying labor for it to be installed into the transponder? If I remember correctly, the estimate was about $400 for the overhaul of the transponder, which I thought the encoder was inside the unit? I just remember something like $600 for both, and I figured labor would jack it up to $1000. Allen |
#7
|
|||
|
|||
Transpondets typically don't have any bearing on what altitude is being
sent out. Most probably its a encoder problem. 90% or more can be adjusted back into spec. You can have a 125ft difference between the encoder and what the altimeter is indicating. Come to Dallas and I'll do a realistic ifr certification for you. Did the shop tell you to send in your transponder? Altimeters can be adjusted also. There is a little Kollsman window adjustment which can change the barometer set ie 29.92 and what the altimeter reads. It's not legal to adjust unless your certified to do it. But Stevie Wonder could do it in his sleep. Dave A Lieberman wrote: Well, I finally got my plane to another place to get my .411 and 413 pitot static / transponder check, and it went from bad to worse..... First person inspecting said everything was fine except for the VSI not being hooked into the static system. I take it to the new place (where I had it done 2 years ago) and they said my transponder altitude encoder was off, and could not be adjusted, either needs an overhaul or replacement, altimeter needs adjustment and overhaul. I am just amazed at the wide differences of opinions. My choices were, overhaul what I have, replace with an overhauled unit or a brand new transponder. This is in order of expense with the first being the lowest expense. After talking with a couple of people, I decided to go with overhaul what I got, as replacing it with another overhauled unit may be buying somebody else's problem. For the Altimeter, I kinda expected it, since it was about 40 feet off when I compared field elevation to the altimeter setting, so no surprises with that. Transponder and Altimeter sent to Wichita for the overhaul, hope to be back in the air early next week. Total cost, probably $1000.00 after all is said and done. Allen |
#8
|
|||
|
|||
Transpondets typically don't have any bearing on what altitude is being
sent out. Most probably its a encoder problem. 90% or more can be adjusted back into spec. You can have a 125ft difference between the encoder and what the altimeter is indicating. Come to Dallas and I'll do a realistic ifr certification for you. Did the shop tell you to send in your transponder? Altimeters can be adjusted also. There is a little Kollsman window adjustment which can change the barometer set ie 29.92 and what the altimeter reads. It's not legal to adjust unless your certified to do it. But Stevie Wonder could do it in his sleep. Dave Mike Rapoport wrote: The encoder is indeed separate from the transponder. It is a little box attached to the static system that converts pressure information to an electrical format that the transponder can understand. Mike MU-2 "A Lieberman" wrote in message ... On Fri, 17 Jun 2005 03:56:36 GMT, Mike Rapoport wrote: A new encoder is only $160. Mike MU-2 Mike, Is the encoder a separate component of the transponder? Or am I paying labor for it to be installed into the transponder? If I remember correctly, the estimate was about $400 for the overhaul of the transponder, which I thought the encoder was inside the unit? I just remember something like $600 for both, and I figured labor would jack it up to $1000. Allen |
#9
|
|||
|
|||
"Mike Rapoport" wrote in message ink.net... The encoder is indeed separate from the transponder. It is a little box attached to the static system that converts pressure information to an electrical format that the transponder can understand. How does it correct for variations in pressure, say, from 29.80 to 30.50HG? |
#10
|
|||
|
|||
|
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Sharing static and pitot line | Istvan Csonka | Soaring | 13 | March 12th 05 03:00 AM |
So I invested my US$6°°.....GUESS WHAT!!!... less than ten days later, I received money | [email protected] | Owning | 1 | January 16th 05 06:48 AM |
Re; What do you think? | Kelsibutt | Naval Aviation | 0 | September 29th 03 06:55 AM |
Pitot and static couplings for a TTU-205 | B2431 | Home Built | 0 | August 15th 03 07:25 AM |