TM 5-5420-278-24&P0018 000018 00-12Table 1. Unit Preventive Maintenance Checks and Services for Ramp Bay (Contd).ITEM TOITEMCHECK/EQUIPMENT NOTNO.INTERVALSERVICEPROCEDUREREADY/AVAILABLE IF:219Semi-Left front annuallyinner ponton end skin surface (1)a. Inspect surface area for punctures,holes, tears, seam ruptures, cracks, andbroken welds.b. Inspect seams for cracked or brokenwelds.a. Damage whichcumulatively addsup to a holeapproximately .26 in. (.66 cm) indiameter (the size ofa typical pen orpencil).b. Cracked orbroken welds noted.1~~20Semi-Left front annuallyunfolding mechanism (2)Inspect torsion bar, stabilizer lever,retaining pins, and turnbuckle forstructural damage or missing or loosemounting hardware.Turnbuckle isbinding, cracked, ordeformation isnoted, or mountinghardware is missingor loose.
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