63-21-01 GENERAL DYNAMICS: Amdt. 623 Part 507 Federal Register September 26, 1963. Applies to All Model 30 Aircraft.
Compliance required within 500 hours' time in service after the effective date of this AD, unless already accomplished.
To prevent a ground fault in the landing gear ground safety switch which causes the loss of braking without a warning indication, modify the aircraft landing gear anti-skid wiring system as follows in accordance with Convair Service Bulletin No. 32-37A revised February 26, 1963, or an FAA Western Region Engineering approved equivalent:
(a) Add a test switch, relay socket, relay and harnesses;
(b) replace the antiskid and light plastic panel, circuit board and plate; and
(c) reroute the wiring.
(Convair Service Bulletin No. 32-37A pertains to this same modification.)
This directive effective October 28, 1963.