59-04-02: Pilot's Direct-Vision Window

59-04-02 CONVAIR: Applies to All Model 240/340/440 Series Aircraft Through Serial Number 485. Compliance required as indicated. Several instances have been reported wherein the pilot's direct-vision window has swung inward beyond the normal stop and has interfered with the movement of the control column. One such instance resulted in a crash landing and a fire which destroyed the aircraft. (1) Within the next 50 hours of operation inspect the DV window and ascertain that the stop is secure. Also,install a placard in the vicinity of the DV window cautioning the pilots against deliberately opening the window past the stop as an interim measure pending compliance with item (2). (2) Not later than September 1, 1959, the following must be accomplished to provide a positive stop for restricting the amount of travel of the DV window to eliminate possible interference between the window and the control column. For model 240 aircraft install a secondary DV window stop such as the safety chain described in Convair Service Engineering Report No. 26/440-28 dated 16 January 1959 or equivalent. For models 340 and 440 aircraft, install either the redesigned positive stop P/N 340-3110303-65 and -66 described in Convair Service Newsletter No. 411 or the secondary DV window stop safety chain described in Convair Service Engineering Report No. 26/440-28 dated 16 January 1959 or equivalent.