Wiring Diagram for Cessna 140

Full document text

Cessna 140 N76600 S/N 11040 Removed Delco-Remy 15A generator P/N 1101876, S/N 9948 (datum –9.50”), Delco-Remy voltage regulator P/N 1118383, and 15A fuse holder. Installed Delco-Remy 35A generator P/N 1101898, S/N A158804 (datum –9.50”), Delco-Remy voltage regulator P/N 1118704, and Potter Brumfield 35A circuit breaker P/N W23X1A1G35. All generator control wiring replaced with MIL-W- 22759/16 Tefzel wire, wire size selection based on International Cessna 120/140 Association Technical Reference Manual, Cessna 100 Series Service Manual, and AC43.13-1B. Note: the original wiring was found sufficient to support this alteration. The original 15A generator fuse was replaced with the above 35A circuit breaker. All work was accomplished utilizing data derived from the International Cessna 120/140 Technical Reference Manual, Continental Type Certificate Data Sheet E-233 Revision 17, Cessna 140 Type Certificate Data Sheet A-768, Teledyne Continental Motors letter signed by Fred Fihe dated May 4, 1977, Teledyne Continental Motors Service Bulletin SB#95-3A, Continental Motors Corporation C85 Overhaul Manual Form X-30010, Cessna 100 Series Service Manual, Cessna Accessory Kit AK 150-23A Instructions and AC43.13-1B. Updated Aircraft and Engine Logbooks, Equipment List and Weight and Balance Report. Pilot Operating Handbook is not impacted by this alteration. This alteration is compatible with all previously approved alterations. Data for Continued Airworthiness per FAA Bulletin HBAW98-18: Section 1. Introduction: Installed Delco-Remy 35A generator P/N 1101898. This installation will enhance aircraft usability. Section 2. Description: Installed Delco-Remy 35A generator P/N 1101898, S/N A158804, voltage regulator P/N 1118704 and 35A circuit breaker Potter Brumfield P/N W23X1A1G35. All generator control wiring replaced with MIL-W-22759/16 Tefzel wire. Section 3. Control, operation information: N/A Section 4. Servicing information: Inspect generator drive coupling bushings IAW Teledyne Continental Motors Service Bulletin SB#95-3A and Continental Motors Corporation C85 Overhaul Manual Form X- 30010. Section 5. Maintenance information: Remove and inspect generator drive coupling bushings IAW Teledyne Continental Motors Service Bulletin SB#95-3A and Continental Motors Corporation C85 Overhaul Manual Form X-30010. Section 6. Troubleshooting information: Remove and inspect generator drive coupling bushings IAW Teledyne Continental Motors Service Bulletin SB#95-3A and Continental Motors Corporation C85 Overhaul Manual Form X-30010. Section 7. Removal and replacement information: Remove and reinstall generator and drive coupling IAW Continental Motors Corporation C85 Overhaul Manual Form X-30010. Section 8. Diagrams: See below. Section 9. Special inspection requirements: Remove and inspect generator drive coupling bushings IAW Teledyne Continental Motors Service Bulletin SB#95-3A. Section 10. Application of protective treatments: N/A. Section 11. Data: International Cessna 120/140 Association Technical Reference Manual pages 2400/05 and 2400/06, Continental Type Certificate Data Sheet E-233 Revision 17, Cessna 140 Type Certificate Data Sheet A-768, Teledyne Continental Motors Corporation letter signed by Fred Fihe dated May 4, 1977, Teledyne Continental Motors Service Bulletin SB#95-3A, Continental Motors Corporation C85 Overhaul Manual Form X-30010 Sections 10-30 through 10-38 pages 43 and 44, Cessna 100 Series Service Manual Section 17 pages 17-5 through 17-10 and Drawing 0410011, Cessna Accessory Kit AK 150-33A Instructions, and AC43.13-1B Figure 11-2 page 11-23. Section 12. List of special tools: N/A. Section 13. For commuter aircraft: N/A. Section 14. Recommended overhaul periods: None specified. Section 15. Airworthiness limitations: N/A. Section 16. Revision: N/A Reference: Section 8. Diagrams: Updated wiring diagram. Legend: Wire numbers from Cessna 120 and 140 Parts Catalog Form 924 Wire # Wire Gauge Wire Location 2 4 gauge Main Battery to Contactor 3 4 gauge Contactor to Starter Motor 6 18 gauge Contactor Coil to Master Switch 7 18 gauge Master Switch to Generator Field 8 10 gauge Generator Armature to Voltage Regulator (Armature) 10 10 gauge Voltage Regulator (Battery) to 35 Amp Circuit Breaker and Main Bus 12 10 gauge Starter Motor to Ammeter 13 10 gauge Ammeter to Main Bus 69 18 gauge Master Switch to Voltage Regulator (Field)