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AC 43.13-1B 9/8/98 of the life rafts, regardless of the last date of inspection, if it is considered that another in- spection is warranted. 9-41. INSPECTION RECORD. The date the inspection was completed will be stenciled on the flotation tube at the left of the cylinder. The size of lettering will not be less than 1/4-inch or greater than 1/2-inch in height. Previous inspection dates will not be removed or obliterated, but will be arranged in columnar form with the latest date at the top. After the inspection is completed, fill out the raft’s in- spection record in accordance with part 43 sec- tion 43.9, and attach the parts tag to the survival equipment. The date on the tag will reflect the same date as stenciled on the flotation tube and will be used to determine the next due date of inspection and test. 9-42. RAFT REPAIRS. a. Repairs. The service life for flotation equipment will be determined by condition rather than age. Equipment passing tests and inspections may remain in service indefinitely since the inflation tests and material inspec- tions will identify and condemn equipment having more than minor installation defects. However, the service life for life rafts operat- ing under normal usage and environmental conditions is anticipated by the manufacturers to be 8 to 10 years, and it is appropriate to base liferaft’spartsreplacementprogramsuponthis estimate. It is not considered advisable or eco- nomical to perform major repairs on life rafts. b. Life Rafts. Life rafts with any of the following conditions should be condemned rather than repaired: (1) Life rafts over 3-1/2 years of age and requiring major repair or more than two minor repairs. (2) A rip or tear across an air retaining seam. (3) Rafts on which oil, grease, or any other foreign substance has caused a deteriora- tion of the rubberized fabric. (4) Rafts on which a heavy mildew condition has caused deterioration of the rub- berized fabric. (5) Rafts on which porous flotation tubes allow diffusion of air. A porous area is located by a soap test on the inflated raft. Higher diffusion is indicated by the excessive loss of pressure after a soap test has failed to locate a specific area of injury on the raft. (6) Rafts requiring internal repair or opening of air retaining seams for repair. (7) Rafts with an excessive number of injuries that would not, in the judgment of competentinspectors,justifyrepair. c. Patches. Holes or abrasions which are 2 inches or less, in diameter (in air retaining chambers) will be repaired by the application of an outside patch. Holes exceeding 2 inches in length or diameter, will require an inside patch as well as an outside patch. Inside and outside patches should be round or rectangular and manufactured of fabric (specification MIL-C-6819). Cement should conform to Class 1 of specification MIL-C-5539. Patch as follows: (1) Outside patches. (a) With a rubber solvent thoroughly clean the area to be patched. (b) From the material referenced, fabricate a patch as shown in figure 9-13. Page 9-32 Par 9-40PDF Image | AFS-640
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