49-43-01 CONVAIR: Applies to All Model 240 Aircraft With Muff Type Augmenter Installation.
Compliance required as noted below.
1. To be accomplished immediately and each day thereafter: To avoid a possible fire hazard inspect corrugated augmenter tube for cracks or burned areas. This inspection is to be conducted from the rear end of the augmenter by means of an extension mirror and light, or equivalent means.
2. To be accomplished at each No. 1 inspection. Inspect the augmenter tube from both the front and rear ends for cracks or burned areas as described above.
3. Cracked or burned augmenters are to be replaced immediately unless the defects fall within the following limits:
(a) Augmenter tubes which are found to have a crack, or cracks, in the outer shell may be flown in scheduled operation to a base station for replacement if the cracks are less than 3/4-inch long, no more than three cracks exist in the outer shell, and no two cracks are within 6 inches of each other.
(b) Augmenter tubes found to have small cracks at the ends of seam welds on the wear band (doubler) at the forward end of the outer shell, are considered airworthy. Such cracks, when confined to the wear band, do not affect the safety of the tube and have shown no tendency to progress to a dangerous condition.
4. The inspections specified in 1 and 2 are not necessary on the following augmenter types:
CVAC P/N 240-6220195 with any of the following forward augmenter sections: 240- 6221107, 240-622107-250, -252, -260, -262, -264, -268, -280, -290, -300, -314, -360.
This supersedes AD 48-40-03.