80-11-04: Cracked Nutplates

80-11-04 CESSNA: Amendment 39-3782. Applies to the following models and serial number airplanes certificated in all categories: \n\n\nModels\n\n\nSerial Numbers \n150F\n15061533\nthrough\n15064532\n150G\n15064533\nthrough\n15067198\n150H\n15067199\nthrough\n15069308\n150J\n15069309\nthrough\n15071128\n150K\n15071129\nthrough\n15072003\n150L\n15072004\nthrough\n15075781\n150M\n15075782\nthrough\n15079405 \nA150K\nA1500001\nthrough\nA1500226 \nA150L\nA1500227\nthrough\nA1500523 \nA150M\nA1500524\nthrough\nA1500734 \n152\n15279406\nthrough\n15284541\nA152\nA1520735\nthrough\nA1520943 \nF150F\nF150-0001\nthrough\nF150-0067\nF150G\nF150-0068\nthrough\nF150-0219 \nF150H\nF150-0220\nthrough\nF150-0389 \nF150J\nF150-0390\nthrough\nF150-0529 \nF150K\nF15000530\nthrough\nF15000658 \nF150L\nF15000659\nthrough\nF15001143 \nF150M\nF15001144\nthrough\nF15001428 \nFA150K\nFA15000O1\nthrough\nFA1500081 \nFA150L\nFA1500082 \nthrough \nFA1500120 \nFRA150L\nFRA1500121\nthrough \nFRA1500261\nFRA150MFRA1500262\nthrough\nFRA1500336\nF152\nF15201429 \nthrough \nF15201803 \nFA152\nFA1520337 \nthrough \nFA1520372 \n\n\tCOMPLIANCE: Required as indicated unless already accomplished. \n\n\tTo detect cracked NAS 1068A4 nutplates which, if allowed to go undetected, could result in separation of the vertical or vertical and horizontal tail assembly from the airplane, within 100 hours time-in-service after the effective date of this AD, and every 100 hours time-in-service thereafter, accomplish the following: \n\n\tA)\tUsing a suitable light and mirror visually inspect the eight NAS 1068A4 nutplates installed on the Part Number 0432004-9 vertical fin aft attach bracket for cracks in the threaded part (nut body) and/or base of the nutplate and replace any cracked nutplates prior to further flight. \n\n\tB)\tCompliance with this AD is no longer required if the NAS 10684A nutplates are replaced with AN365-428, MS20365-428, MS2l042L4 or MS21044N4 nuts. \n\n\tC)\tAny equivalent method of compliance with this AD must be approved by the Chief, Aircraft Certification Program, Room 238, Terminal Building 2299, Mid-Continent Airport, Wichita, Kansas 67209. \n\n\tNOTE: Cessna Single Engine Service Information Letter SE79-49, Revision # 1, dated April 28, 1980, pertains to the subject. \n\n\tThe AD supersedes AD 78-07-10, Amendment 39-3174 (43 FR 14958, 14959). \n\n\tThis Amendment 39-3782 becomes effective June 2, 1980.