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9/8/98 AC 43.13-1B 9-37. LIFE RAFTS. Inflatable life rafts are subject to general deterioration due to aging. Experience has indicated that such equipment may be in need of replacement at the end of 5 years due to porosity of the rubber-coated material. Wear of such equipment is acceler- ated when stowed on board aircraft because of vibration which causes chafing of the rubber- ized fabric. This ultimately results in localized leakage. Leakage is also likely to occur where the fabric is folded because sharp corners are formed. When these corners are in contact with the carrying cases or with adjacent parts of the rubberized fabric, they tend to wear through due to vibration (Ref: TSO-C70a). a. When accomplishing maintenance, repair, and inspection of unpacked rafts, per- sonnel should not step on any part of the raft or flotation tubes while wearing shoes. Rafts should not be thrown or dropped, since dam- age to the raft or accessories may result. Par- ticular care should be exercised at all times to prevent snagging, cutting, and contact with gasoline, acids, oils, and grease. High stan- dards of performance for proper maintenance, inspection, and repair cannot be overempha- sized, since the lives of passengers could be involved. b. Inspection and inflation tests, when applicable, will be accomplished during stor- age and after installation in an aircraft in ac- cordance with the manufacturer’s specifica- tions and/or FAA-approved procedures. Ac- cessory items will be installed during these in- spections. A raft knife will be attached by a 24-inch nylon lanyard to the mooring eye lo- cated above the CO2 cylinder case to enable rapid cutting of the mooring line. 9-38. LIFE RAFT INSPECTIONS. In- spection of life rafts should be performed in accordance with the manufacturer’s specifications. General inspection procedures to be performed on most life rafts are as fol- lows. CAUTION: Areas where life rafts are inspected or tested must be smooth, free of splinters, sharp projections, and oil stains. Floors with abrasive characteristics, such as concrete or rough wood, will be covered with un- treated tarpaulins or heavy clean pa- per. a. Inspect life rafts for cuts, tears, or other damage to the rubberized material. If the raft is found to be in good condition, remove the CO2 bottle(s) and inflate the raft with air to a pressure of 2 psi. The air should be intro- duced at the fitting normally connected to the CO2 bottle(s). After at least 1 hour, to allow for the air within the raft to adjust itself to the ambient temperature, check pressure and ad- just, if necessary, to 2 psi and allow the raft to stand for 24 hours. If, after 24 hours, the pres- sure is less than 1 psi, examine the raft for leakage by using soapy water. In order to eliminate pressure variations due to tempera- ture differences at the time the initial and final reading are taken, test the raft in a room where the temperature is fairly constant. If the pres- sure drop is satisfactory, the raft should be considered as being in an airworthy condition and returned to service after being fitted with correctly charged CO2 bottles as determined by weighing them. Rafts more than 5 years old are likely to be unairworthy due to deteriora- tion. It is suggested that serviceable rafts be marked to indicate the date of inspection and that soapstone be used when folding them pre- paratory to insertion into the carrying case. Take care to see that all of the raft’s required equipment is on board and properly stowed. If the raft lanyard, used to prevent the raft from floating away from the airplane, is in need of Par 9-37 Page 9-27 SECTION 3. EMERGENCY EQUIPMENTPDF Image | AFS-640
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