63-08-03 LOCKHEED: Amdt. 553 Part 507 Federal Register April 9, 1963. Applies to All Model 188 Series Aircraft.
Compliance required as indicated.
To eliminate the possibility of fouling the deboost control systems, accomplish the following within 650 hours' time in service after the effective date of this AD, unless previously accomplished.
(a) Modify all aircraft by installing deflectors on the rudder and elevator spring cartridges and by chamfering corners of the aileron and elevator spring cartridges to eliminate sharp edges and projections in the area of the "off" branch cables in accordance with Lockheed Service Information Letter 881 SIL-30, dated December 29, 1961, or FAA approved equivalent.
(b) Modify those aircraft which incorporate the provisions of Service Bulletin 88/SB- 547, dated August 4, 1961, by inverting the screw and nut that attach the left-hand fuel dump chute locking cable conduit tube to the floor support below the pilot's lower center consolecontrol box, in accordance with the -1 PS of Lockheed Drawing 840850.
(Lockheed Service Information Letter 88/SIL-30, dated December 29, 1961, and revision to Lockheed Service Bulletin 547, dated March 28, 1962, cover this same subject.)
This directive effective May 9, 1963.