MAIN ROTOR

“FOD REMINDER” Check work area for tools and parts after completion of maintenance and inspection TM 1-1520-238-PMS C 7 69 Seq. No. Location Item and Procedure 8.4 4 MAIN ROTOR HEAD AND LINKS FOR CRACKS, DISTORTION, SECURITY, AND ALINEMENT BLADE STRUCTURE FOR CRACKS, SURFACE DAMAGE OR BONDING SEPARATION LOOSE OR MISSING HARDWARE 5 BLADE FEATHERING BEARING HOUSINGS – (4 HOUSINGS) ATTACH HOLES FOR CRACKS TOP AND BOTTOM WEBS FOR CRACKS. Use 10 power magnifier DEICING CABLES FOR CHAFING OR DAMAGED INSULATION AND CONNECTION SECURITY 6 BLADE ROOT UPPER AND LOWER BOLT BUSHINGS FOR CRACKS – (8 BUSHINGS EACH BLADE) 7 ROTOR HUB STRAP PACKS FOR CRACKED, BUCKLED, BROKEN, OR HORIZONTAL DISPLACEMENT – CHECK INBOARD AND OUTBOARD ENDS OF 4 STRAP PACKS 8 DAMPERS FOR CRACKS, SECURITY, AND ALINEMENT 9 BLADE ATTACH PINS FOR LOCKED POSITIONS (HANDLES CLIPPED DOWN) – (8 ATTACH PINS) 10 STATIC GROUND BRUSH ASSEMBLIES FOR EVIDENCE OF EVEN CONTACT WITH THE HUB LINER LOWER FLANGE 8.5 11 UPPER CONTROLS (MIXER) SWASHPLATES, LINKS, AND BELLCRANKS FOR CRACKS, DISTORTION, SECURITY, ALINEMENT, AND LOOSE OR MISSING HARDWARE. SWASHPLATE SEAL AREA FOR EVIDENCE OF GREASE LEAKAGE. SWASHPLATE PITCH CHANGE LINK RODS FOR WEAR OR CHAFING AND SLIDER BEARINGS THAT HAVE CHROMIUM OXIDE-COATED (DARK BROWN) SPHERICAL BALLS FOR FLAKING. 8.6 12 MAST PHYSICAL DAMAGE AND SECURITY LOOSE OR MISSING BASE FLANGE NUTS OR WASHERS BASE FLANGE FOR CRACKS – IMPORTANT: DETAIL CHECK ALL 18 BOLT HOLES