On Wed, 12 Jan 2005 01:34:34 GMT, Dave in San diego
postulated :

You had to go and do it - bring up old painful memories. The ARC-27 was
my second least favorite piece of tron gear to replace. The ARN-21 TACAN
ranked first, primarily because of its generally more difficult location
in the a/c. Can you believe they still had those boat anchors around into
the 80s?

I worked on FJ-3M, F9F, F11F, AD-6, and A4D.
The A4D was the worst for me with that damned "biscuit" which housed
it all. The ARC-27 was my bread and butter gear. Easy to diagnose
problems. Using the bicycle pump always attracted the attention of the
other shops. The only gear I never really understood was the APX-6
transponder. I always kept a wary eye on that live round .45 shell
aimed at the Top Secret cavitron.