47-10-11 LOCKHEED: (Was Mandatory Note 13 of AD-763-3.) Applies to All Model 49 Serials Up to and Including 2088.
Compliance required not later than 200 hours of operation after March 1, 1947.
Replace all Fenwall Type S-2223 fire detector units on fire seals and firewalls and in nacelles and cabin heater compartments with Type 17343-3-450 fire detector units (100 units for each Model 49-51 aircraft, 116 units for each Model 49-46 aircraft.)
(LAC Service Bulletin 49/SB-65 covers this same subject.)