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> My understanding is that work on a non structural panel, such as > installing radios, requires only a log book entry and recording of the > new weight and balance data by an AI. If there's no 337 involved, an IA is not necessary. (In fact, technically an IA cannot sign it off. An A&P is required. Since most if not all IA's are also A&P's, it's pretty much a semantic issue, but the signer must sign it off as an A&P.) IA's can only inspect, they can't do any actual work... ;) John Cooper, A&P Skyport Services PO Box 249 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 Fax 518 797-3865 www.skyportservices.net > -----Original Message----- > From: Dan Brown [mailto:[EMAIL PROTECTED] > Sent: Saturday, March 10, 2007 7:29 AM > To: Ctech > Subject: Re: [COUPERS-TECH] TSO'd vs Non TSO'd instruments: another view > > ----[Please read http://ercoupers.com/disclaimer.htm before following any > advice in this forum.]---- > > > I think some of the confusion may be between the work that the aircraft > owner can do as preventative maintenance, the work that an AI can sign > off with a log book entry as a minor change, and the major work that > requires a 337 or FAA field approval. This is a seperate issue from the > TSO vs non TSO'd instruments. > > My understanding is that work on a non structural panel, such as > installing radios, requires only a log book entry and recording of the > new weight and balance data by an AI. > > Dan Brown > > > John Roach wrote: > > > ----[Please read http://ercoupers.com/disclaimer.htm before following > > any advice in this forum.]---- > > > > > > Lynn. > > Another view of the TSO puzzle from Bill Biggs. See below > > > > John Roach > > N 2427H > > > > > > RE: [COUPERS-TECH] Answers Re: TSO/Non-TSO > > > > WILLIAM BIGGS > > Fri, 12 Jan 2007 06:08:23 -0800 > > > > "5) You may not even need a 337. Those forms address the > > installation process, NOT the radio itself, and are only needed at all > > IF the installation involves a "major structural change." Putting the > > radio into an existing hole, or hanging it beneath the panel does NOT > > need a 337. Similarly, if you're putting a new antenna into an > > existing antenna mount location, its not a "major structural change," > > therefore no 337 needed. " > > > > Not true. Example: If you change from your cessna radio to a Michael. > > It goes in exactly the same location but we all know they require a > > 337. Hanging an additional radio beneath the panel constitutes a > > change in weight and ballance however small and must be recorded. > > > > 337s now require a provision for "continued airworthiness." Anything > > that is not in the airframe or engine specifications that is added or > > changed constitutes a major alteration unless specifically excluded in > > part 43.1. > > > > The following is considered preventative maint and is allowed but only > > of the EXACT type: > > > > (31) Removing and replacing self-contained, front instrument > > panel-mounted navigation and communication devices that employ > > tray-mounted connectors that connect the unit when the unit is > > installed into the instrument panel, (excluding automatic flight > > control systems, transponders, and microwave frequency distance > > measuring equipment (DME)). The approved unit must be > > designed to be readily and repeatedly removed and replaced, and > > pertinent instructions must be provided. Prior to the unit's intended > > use, and operational check must be performed in accordance with the > > applicable sections of part 91 of this chapter. > > (32) Updating self-contained, front instrument panel-mounted Air > > Traffic Control (ATC) navigational software data bases (excluding > > those of automatic flight control systems, transponders, and microwave > > frequency distance measuring equipment (DME)) provided no disassembly > > of the unit is required and pertinent instructions are provided. Prior > > to the unit's intended use, an operational check must be performed in > > accordance with applicable sections of part 91 of this chapter. > > > > Appendix A > > > > Sec. A43.1 > > > > (a) /Major alterations/-- > > (1) /Airframe major alterations./ Alterations of the following parts > > and alterations of the following types, _when not listed in the > > aircraft specifications issued by the FAA_, are airframe major > > alterations: > > > > Bill > > > > > > > > [EMAIL PROTECTED] wrote: > > > >> ----[Please read http://ercoupers.com/disclaimer.htm before following > >> any advice in this forum.]---- > >> > >> > >> Hey Gang: Some time ago we had a discussion about TSO'd and non > >> TSO'd instrument requirements. As I remember, one of our group came > >> up with the FAA paragraph's that specifically spelled out the use of > >> those items. I saved the message, but unfortunately for me, my > >> computer bombed last fall, and I lost all of the saved messages > >> before then. > >> I have reviewed most of last years Tech messages, and did not > >> find what I was looking for. Does anyone have the answer? I know > >> there was considerable discussion about radios. but I am specifically > >> concerned about instruments. > >> Lynn > >> > >> > >> > >> ----------------------------------------------------------------------- > - > >> AOL now offers free email to everyone. Find out more about what's > >> free from AOL at *AOL.com* > >> <http://www.aol.com?ncid=AOLAOF00020000000339>. > >> > ========================================================================== > ==== > >> > >> To leave this forum go to: http://ercoupers.com/lists.htm > >> > >> > >> > >> > > > > > > > ========================================================================== > ==== > > > > To leave this forum go to: http://ercoupers.com/lists.htm > > > > > > > > > > > > > ========================================================================== > ==== > To leave this forum go to: http://ercoupers.com/lists.htm > > > ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm
