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2) Trim the defect (do not increase its depth) using an extra smooth file then abrasive cloth (TB 05-916A). 3) Protect the bared metal by applying, using a pad, a mixture of protection product (TB 05-939) and water (75 % in volume). 4) Rinse with clean water. Dry and immediately apply the paint scheme. 5) Apply a coat of primer (TB 16-901). 6) Apply two coats of paint (TB 16-903). C. Repair procedure for a defect depth within 0.007 in (0.2 mm) and 0.023 in (0.6 mm) 1) Remove the rivets plugging the degassing holes. Take care not to enlarge the holes. 2) Remove the round stickers blanking the holes behind the mounting plates. 3) Using a syringe, fill the tubes with cleaning agent (TB 11-003). 4) Shake the engine mount to impregnate the protection which covers the inside of the tubes. 5) Allow the cleaning agent to act for one hour, then drain by positioning the holes downwards. 6) Repeat steps 3) to 5) three times. At the last draining, make sure the recovered product is clean. 7) Ventilate the tubes to remove residual vapors. 8) Trim the defect (do not increase its depth) using an extra smooth file then abrasive cloth (TB 05-916A). CAUTION : THIS TYPE OF REPAIR SHALL ONLY BE PERFORMED IN AN APPROVED WORKSHOP AND BY QUALIFIED PERSONNEL. 9) Perform welding (T.I.G. process). Blow argon into the tube during the entire operation, until complete cooling of the tube. 10) Check the weld by magnetic particle inspection. ABAA Validity : S / N 1 - 9999 71-20-00 Page 802 (CA) JUN 02 11) Using a syringe, protect the inside of the tubes with siccative oil (TB 05-914) - refer to 20-00-16. 12) Protect the bores and unpainted surfaces. 13) Apply one coat of primer (TB 16-901). 14) Apply two coats of paint (TB 16-903). Defects authorized on engine mount Figure 801 3. DESCRIPTION |
