SERVICE BULLETIN NO. 1139A

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1139A Date: April 9, 2004 (S)(M) SB1139A supersedes SB 1139. This revision adds a screw retaining clip to the control wheel installation and adds aircraft models and serial numbers to the effectivity. SUBJECT: CONTROL WHEEL ATTACHMENT INSPECTION & RETAINER CLIP INSTALLATION This is a two part service bulletin: Aircraft in Group A require accomplishment of Part I and Part II. Aircraft in Group B require accomplishment of Part II only. Aircraft listed in Group A that were modified in accordance with the original issuance of this service bulletin are considered in compliance with Part I. Proceed to Part II. MODELS AFFECTED: SERIAL NUMBERS AFFECTED: Group A PA-28-161 Warrior III 2842026 through 2842180 PA-28-181 Archer III 2843112 through 2843565 PA-28R-201 Arrow 2844014 through 2844099 PA-32R-301 Saratoga II HP 3246098 through 3246214 PA-32R-301T Saratoga II TC 3257028 through 3257327 PA-34-220T Seneca V 3449042 through 3449292 PA-44-180 Seminole 4496020 through 4496173 & 4496175 PA-46-350P Mirage 4636132 through 4636344 PA-46-500TP Meridian 4697001 through 4697162 Group B PA-28-161 Warrior III 2842181 through 2842203 PA-28-181 Archer III 2843566 through 2843588 PA-28R-201 Arrow 2844100 through 2844104 PA-32R-301 Saratoga II HP 3246215 through 3246219 PA-32R-301T Saratoga II TC 3257328 through 3257340 PA-32-301FT Piper 6X 3232001 through 3232013 PA-32-301XTC Piper 6XT 3255001 through 3255014 PA-34-220T Seneca V 3449293 through 3449301 PA-44-180 Seminole 4496174 & 4496176 through 4496180 PA-46-350P Mirage 4636345 through 4636348 PA-46-500TP Meridian 4697163 through 4697174 COMPLIANCE TIME: Part I - Within the next 25 hrs of operation. Part II - Within the next 100 hrs of operation. The New Piper Aircraft, Inc. 2926 Piper Drive Vero Beach, Florida, U.S.A. 32960 TM (OVER) ATA: 2701 APPROVAL: The technical content of this Service Bulletin has been shown to comply with the applicable Federal Aviation Regulations and is FAA approved. PURPOSE: A report from the field has been received of a pilot side control wheel separating from the control wheel shaft resulting in loss of control of the aircraft from the pilot seat location. The incident occurred on a 2002 model, PA-28-181 Archer III aircraft that utilizes the modern control wheel introduced in all New Piper production models in early 1998. The method of attachment of the control wheel to the shaft was changed at the time of introduction of the new control wheel and this publication is applicable only to those aircraft that utilize this new type of control wheel. This Service Bulletin requires a one time inspection of the control wheel attaching hardware for proper installation, addition of Loctite thread locking compound to the screw installation, and installation of a secondary mechanical locking device (a retainer clip) to the control wheel attachment. INSTRUCTIONS: PART I (Reference Figure 1) NOTE: Steps 1 through 4 are to be accomplished on both the left hand and right hand control wheel installations. 1. Inspect the control wheel attachment screw for proper thread engagement as follows: a) Remove the Piper logo medallion, P/N 474-364, from the front of the control wheel by removing the 4 allen head cap screws, P/N 520-025 (NAS1352-06-12), from the back side of the control wheel to gain access to the inside diameter of the control wheel and control wheel shaft. b) Inspect the end of the screw, P/N 410-046, (MS24694-S59) that secures the control wheel to the shaft for proper thread engagement through the nut plate (minimum 1 thread showing past the end of the nut plate). c) If insufficient thread engagement is found, replace the screw with the next longer screw, P/N 410-047 (MS24694-S60) during re-assembly. 2. Check the nut plate for sufficient locking characteristics as follows: a) Remove the screw, P/N 410-046, (MS24694-S59) and the spacer, P/N 101105-002 (Ref Section View "A") from the control wheel column. b) Remove the control wheel from the shaft. c) Re-install the screw into the nut plate located within the control wheel shaft and attempt to fully tighten the screw by hand (without the aid of a screwdriver). If the screw can be fully inserted into the nut plate by hand (one thread past the end of nut), then replacement of the nut plate is required. The nut plate is part of the spacer assembly P/N 101118-002 (On PA-46-350P & PA-46-500TP) or P/N 101118-003 (on all other models). If replacement is required, carefully drill out the rivet, P/N 420-706 (AN426-AD3-7), securing the spacer assembly to the control wheel shaft to remove the spacer assembly. Order and install a new spacer assembly P/N 101118-002 (On PA-46-350P & PA-46-500TP) or P/N 101118-003 (on all other models) and secure to the control wheel shaft using rivet, P/N 420-706 (AN426-AD3-7). SERVICE BULLETIN NO. 1139A PAGE 2 OF 5 SERVICE BULLETIN NO. 1139A PAGE 3 OF 5 Control Wheel Attachment Inspection Figure 1 SERVICE BULLETIN NO. 1139A PAGE 4 OF 5 INSTRUCTIONS: (Continued) 3. Re-assemble the control wheel onto the control wheel shaft as follows: a) Thoroughly clean the nut plate on the spacer assembly (P/N 101118-002 or -003), the screw (P/N MS24694-S59 or -S60), and the spacer (P/N 101105-002) with acetone or similar solvent to ensure the parts are thoroughly degreased for application of Loctite thread locking compound. b) Re-install the control wheel onto the control wheel shaft and line up the screw hole in the wheel to the hole in the shaft. Note: The screw installation must be completed promptly after application of the Loctite thread locking compound due to the short cure time of the compound. c) Apply Loctite Primer #7649 and Loctite thread locking compound #271 to the screw threads per the manufacturer's instructions and install the screw, 410-046 (MS24694-S59) or 410-047 (MS24694-S60) and the spacer, P/N 101105-002. Tighten the screw until fully seated.