TM 1-1520-238-239-2289.63.PILOT EXT LT/INTR LT PANEL CONTROL KNOB REMOVAL/INSTALLATION – continuedc. Remove control knob (1) from EXT LT/INTR LTpanel (2).(1) Loosen two setscrews (3). Use socket headkey set.(2) Remove knob (1) from shaft (4).9.63.4. Cleaninga. Clean removed and attaching parts (para1.47).9.63.5. Inspectiona. Check removed and attaching parts for dam-age (para 9.61).b. Check knobs for cracks and damaged threads(para 9.61).c. Check removed and attaching parts for corro-sion (para 1.49).9.63.6. Installationa. Install knob (1) on panel (2).(1) Position knob (1) on shaft (4).(2) Set knob pointer (5) to OFF.(3) Tighten two setscrews (3). Use socket headkey set.b. Inspect (QA).c. Perform pilot edge-lights maintenance opera-tional check (TM 1-1520-238-T).END OF TASKFLOOBRTDIMR/CTRBATL CSLOFFREDOFOLNAVBATOFFOFF42135M04-1394-2
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