Battery installation for a Champ

[pmanton]

I am getting ready to submit a field approval for a battery only installation in my Champ. I am running scared.  I haven’t had much luck getting field approvals through my present PMI. I found out that “Shopping around” isn’t going to be an option.
I now have 2 approved 337s for “acceptable data” N84096 and N83729. If anyone has a battery only 337 in their Champ via field approval I’d really appreciate a copy of the 337 with the approval stamp in Block 3. I’d like to overwhelm my inspector with acceptable data.

The last field approval I tried to get through I included 4 approved 337s. 3 were mine from my previous PMI and the 4th was another IA’s 337. Guess what disapproved.

Thanks much
Paul
N2426E

[Paul Agaliotis]

Paul,
The battery installation is an approved item on the TCDS item 304 a&b. There is also an AC for installation of differing batteries, also an approved document. Check with your IA and see what he needs.
Paul

[pmanton]

I am my IA
That's interesting.
I hadn't considered that. Call out the TCDS for the installation, and change the battery to 12 volts citing AC 23-27
You're a clever fellow.

Thanks

Paul Anton
Salome, AZ

[pmanton]

I

[pmanton]

.

[pmanton]

I have no idea how the multiple messages happened. I tried editing them but cannot delete the extra messages. My apologies

[pmanton]

I am my IA
That's interesting.
I hadn't considered that. Call out the TCDS for the installation, and change the battery to 12 volts citing AC 23-27
You're a clever fellow.

Thanks

Paul Anton
Salome, AZ

[pmanton]

I am my IA
That's interesting.
I hadn't considered that. Call out the TCDS for the installation, and change the battery to 12 volts citing AC 23-27
You're a clever fellow.

Thanks

Paul Anton
Salome, AZ

[pmanton]

I am my IA
That's interesting.
I hadn't considered that. Call out the TCDS for the installation, and change the battery to 12 volts citing AC 23-27
You're a clever fellow.

Thanks

Paul Anton
Salome, AZ

[Paul Agaliotis]

Paul,
Most of this stuff has been done a thousand times. I don't know why the FAA hasn't created a standard template for some of these installations. In your case a log entry and W/B calculations is all I see needed. The battery and its substitutions are all approved.
It's been my experience that when you ask the FAA for approval they decline. Not right away but make it an onerous journey that most try, but few succeed.
Paul

[vintageair]

I am in the process of putting an Odyssey SBS-J12 battery in my Champ. Right now it has a Gil G-25 installed behind the rear seat. I want to install the Odyssey on the firewall (fwd side) and I was going to do a 337 but after doing my research I have come to the conclusion that it is not necessary, at least not for me but my case is somewhat unique. My Champ was originally a 7FC that was converted to tailwheel (like most of them) so it is essentially an EC but still registered as an FC.

So, as Paul A. noted above it states in the TCDS A-759, Note 307(b) that the battery location for a 7FC is at Sta -27 on the forward side of the firewall. This is also shown in the Champion Aircraft Operating and Service Manual for models 7EC and 7FC in the Electrical System Installation drawing on page 52, the Electrical System Schematic Drawing on page 55 and the Battery Installation 7FC photograph on page 64. Furthermore the Odyssey SBS-J16 is FAA/PMA for aircraft installation. I have done all of the W&B calcs and I am inside the envelope for any possible loading configuration I can dream up.

I am also an IA and despite the fact that I see this as a bulletproof submission it is my conclusion that this installation can be done with a logbook entry.

[brink]

Some IA's approach this as a gray area. If your model Champ did not come with a battery, or electrical system, and your wanting to install a battery? you must legally submit a 337, and possibly a DER. If your doing a complete system, a more modern Champ that had an electrical system may be used as reference, for your approval, If your operating as a light sport aircraft, be ware of the catch 22, Many DC and AC models just use a battery to power radios, and charge in the hanger, this allows your Champ to maintain your Light sport Weight. and still have radios, I personally use a hand held unit and a hand held GPS,there are Several champs in our area, with all kinds of configurations, I as an IA return to service approved installations only, and sometimes assist owners to get there approval, some I have walked away from. If you use the battery only in an AC/or DC Model your best choice of location is the fire wall and a jell cell, there small, kinda lite and in a battery box are very safe. good luck just my 2 cents, A fellow Aviator Sunny