47-10-28 LOCKHEED: (Was Mandatory Note 31 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2088.
Compliance required prior to July 1, 1947.
Enlarge holes in elevator cable seals in aft pressure bulkhead to 0.19 + 0.031-inch diameter.
(LAC Service Bulletin 49/SB-208 covers this same subject.)