# AD 79-08-03: Electrical System - Type: Airworthiness directive - Status: Current - Products: Cessna 120, 140, 140A, 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H and 143 more - Effective: June 6, 1979 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-3428 - Registered aircraft: 57,022 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D175D2296B42FCD686256A34006AA97C.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/79-08-03 ## The airworthiness directive 79-08-03 CESSNA: Amendment 39-3428. Applies to the following models and serial numbered airplanes certified in all categories: MODELS SERIAL NUMBERS 120, 140 8000 through 15075 and 15200 through 15724 150 15065062 through 15075564 A150 A15000001 through A15000480 170 18000 through 20999 and 25000 through 27169 172 28000 through 29999, 46001 through 47746, 17247747 through 17250572, and 17259224 through 17267584 R172 R1722000 through R1722724 P172 P17257120 through P17257189 175 55001 through 56777 and 17556778 through 17557119 177 17700001 through 17702314 177RG 177RG0001 through 177RG0788 180 30000 through 32999, 50000 through 50355, and 18051608 through 18052770 182 33000 through 34999, 51001 through 51556, and 18254680 through 18265965 185 18500968 through 18503458 188 188-0001 through 188-0572 and 18800573 through 18803046 190, 195 7001 through 7999 and 16000 through 16183 210-5 (205) and 210-5A (205A) 205-0320 through 205-0577206, U206, TU206, P206, TP206 206-0001 through 206-0275, U206-0276 through U206-1444, U20601445 through U20604074, P206-001 through P206-0603, and P20600604 through P20600647 207 20700001 through 20700414 (except those aircraft with factory installed 24-volt electrical system) 210, T210 21058162 through 21061039 and T210-0001 through T210-0454 COMPLIANCE: At the next appropriate inspection prescribed by Federal Aviation Regulation 91.169 following the effective date of this AD, unless previously accomplished. To prevent an inflight electrical system failure, smoke in the cockpit, and/or fire in the wire bundle behind the instrument panel, accomplish the following: A) Disconnect the wire, at the ammeter or at the electrical system bus as applicable, that connects the bus to the cigar lighter receptacle. (The wire is connected to either the bus side or equipment side of a circuit breaker or to the ammeter.) Following the disconnection of this wire either:1) Reconnect the wire to the electrical bus by using an existing or newly installed circuit protection device that is properly rated to protect the wire gauge used for this circuit, or 2) Disconnect the wire from the lighter receptacle at the opposite end and remove it from the airplane, or 3) Protect the wire by insulating its disconnected end, fold this wire end back against the wire bundle in which it is routed and secure it to that bundle. NOTE: For those installations reconnected in accordance with paragraph A 1 the proper rated circuit protection device to be used may be determined by consulting FAA Advisory Circular 43.13-1A. B) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. Amendment 39-3428 became effective May 21, 1979. This correction becomes effective June 6, 1979. ## Affected data sheets (16) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A4CE](https://openairdocs.org/tcds/A4CE): Textron Aviation Inc.; names 28 of 29 models: TP206B, TP206C, TU206A, U206, P206C, P206E, TP206A, 206… - [TCDS 3A21](https://openairdocs.org/tcds/3A21): Textron Aviation Inc.; names 26 of 28 models: 210J, 210D, 210R, T210M, 210, 210M, 210-5A (205A), 210H… - [TCDS 3A13](https://openairdocs.org/tcds/3A13): Textron Aviation Inc.; names 19 of 23 models: 182D, 182A, 182J, 182P, 182B, 182L, 182G, 182Q… - [TCDS 3A12](https://openairdocs.org/tcds/3A12): Textron Aviation Inc.; names 18 of 18 models: 172F (USAF T-41A), 172M, 172Q, 172R, 172K, 172G, 172A, 172L… - [TCDS 3A19](https://openairdocs.org/tcds/3A19): Textron Aviation Inc.; names 16 of 18 models: 150L, 150B, 150D, A150L, A150K, 150E, A150M, 150M… - [TCDS 3A17](https://openairdocs.org/tcds/3A17): Textron Aviation Inc.; names 12 of 12 models: R172H, R172G, R172K, R172F, 172RG, R172J, 175, 175B… - [TCDS 5A6](https://openairdocs.org/tcds/5A6): Textron Aviation Inc.; names 11 of 11 models: 180E, 180J, 180F, 180H, 180A, 180, 180B, 180D… - [TCDS 3A24](https://openairdocs.org/tcds/3A24): Textron Aviation Inc.; names 6 of 8 models: 185B, 185E, 185C, 185A, 185D, 185 - [TCDS A-790](https://openairdocs.org/tcds/A-790): Textron Aviation Inc.; names 4 of 4 models: 195A, 190, 195B, 195 - [TCDS A-799](https://openairdocs.org/tcds/A-799): Textron Aviation Inc.; names 3 of 3 models: 170, 170A, 170B - [TCDS A13CE](https://openairdocs.org/tcds/A13CE): Textron Aviation Inc.; names 3 of 3 models: 177, 177A, 177B - [TCDS A9CE](https://openairdocs.org/tcds/A9CE): Textron Aviation Inc.; names 3 of 7 models: 188A, 188, 188B - [TCDS A-768](https://openairdocs.org/tcds/A-768): Textron Aviation Inc.; names 2 of 2 models: 140, 120 - [TCDS A16CE](https://openairdocs.org/tcds/A16CE): Textron Aviation Inc.; names 2 of 4 models: 207, 207A - [TCDS 5A2](https://openairdocs.org/tcds/5A2): Textron Aviation Inc.; names 1 of 1 models: 140A - [TCDS A20CE](https://openairdocs.org/tcds/A20CE): Textron Aviation Inc.; names 1 of 1 models: 177RG ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 57,022 (57,022 by airframe model, 0 by engine model) - Makers: Cessna 55,429, Textron 1,586, P Z L Koliber 4, Cessna Wren 3 Models with the most aircraft: - [Cessna 172M](https://openairdocs.org/model/cessna-172m): 3,573 aircraft (airframe model) - [Cessna 172N](https://openairdocs.org/model/cessna-172n): 3,138 aircraft (airframe model) - [Cessna 182P](https://openairdocs.org/model/cessna-182p): 2,099 aircraft (airframe model) - [Cessna 172S](https://openairdocs.org/model/cessna-172s): 1,914 aircraft (airframe model) - [Cessna 172](https://openairdocs.org/model/cessna-172): 1,805 aircraft (airframe model) - [Cessna 140](https://openairdocs.org/model/cessna-140): 1,603 aircraft (airframe model) - [Cessna 182Q](https://openairdocs.org/model/cessna-182q): 1,565 aircraft (airframe model) - [Cessna 150L](https://openairdocs.org/model/cessna-150l): 1,447 aircraft (airframe model) - [Cessna 150M](https://openairdocs.org/model/cessna-150m): 1,439 aircraft (airframe model) - [Cessna 170B](https://openairdocs.org/model/cessna-170b): 1,299 aircraft (airframe model) - [Textron 172S](https://openairdocs.org/model/textron-172s): 1,239 aircraft (airframe model) - [Cessna 180](https://openairdocs.org/model/cessna-180): 1,177 aircraft (airframe model) - [Cessna 172P](https://openairdocs.org/model/cessna-172p): 1,111 aircraft (airframe model) - [Cessna 150F](https://openairdocs.org/model/cessna-150f): 1,063 aircraft (airframe model) - [Cessna 172K](https://openairdocs.org/model/cessna-172k): 1,026 aircraft (airframe model) - [Cessna 150G](https://openairdocs.org/model/cessna-150g): 977 aircraft (airframe model) - [Cessna 182T](https://openairdocs.org/model/cessna-182t): 968 aircraft (airframe model) - [Cessna 172L](https://openairdocs.org/model/cessna-172l): 857 aircraft (airframe model) - [Cessna 177B](https://openairdocs.org/model/cessna-177b): 843 aircraft (airframe model) - [Cessna 177RG](https://openairdocs.org/model/cessna-177rg): 787 aircraft (airframe model) All 171 models: https://openairdocs.org/ad/79-08-03/models.md Every aircraft: https://openairdocs.org/ad/79-08-03/aircraft.md ## Related documents - [AC 43.13-1B CHG 1 Ed Update](https://openairdocs.org/ac/43.13-1): Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair. Cited as AC 43.13-1A in the AD's requirements --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.