47-10-24 LOCKHEED: (Was Mandatory Note 27 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2088.
Compliance required prior to June 1, 1947.
Install thermal relief valve and bypass line in fuel crossfeed line adjacent to No. 4 cross transfer valve.
(LAC Service Bulletin 49/SB-48 covers this same subject.)