On 6/8/2010 6:41 PM, [email protected] wrote: > Meaning we can replace a faulty one with another SW gage. Correct?
Yes and no. When the manufacturer (e.g. ERCO) Purchases gauges from a supplier and passes them through their FAA approved QA system, they become certified aircraft parts. If you purchase an identical part from, say, NAPA, it is not a certified aircraft part. Your mechanic can determine it is a suitable part and install it on your aircraft with a log book entry, but it is his signature that makes it legal and his butt in the sling if it doesn't work out! For this reason, many A&P's prefer to install parts that have some basis for approval, such as TSO'd or PMA'd parts. -- John Cooper Skyport East www.skyportservices.net
