AD 79-08-03    Cigar Lighter

June 6, 1979

This AD affects a group of ’67 “G’s” – ’74 “L’s” and ’70 – ’74 A150K’s and “L’s.”

The objective of this AD was to prevent electrical failure, or smoke in the cockpit, or a possible fire in the wire bundle behind the instrument panel. This one is easy. Find the wire between the ammeter and the cigar lighter, or the wire between the bus and the cigar lighter, as applicable, and disconnect it. Once the wire is disconnected you have two choices, 1) remove the wire completely, or 2) add a circuit protection device and hook it back up.

79-08-03 CESSNA: Amendment 39-3428. Applies to the following models and serial numbered airplanes certified in all categories:

120, 1408000 through 15075 and 15200 through 15724
15015065062 through 15075564
A150A15000001 through A15000480
17018000 through 20999 and 25000 through 27169
17228000 through 29999, 46001 through 47746, 17247747 through 17250572, and 17259224 through 17267584
R172R1722000 through R1722724
P172P17257120 through P17257189
17555001 through 56777 and 17556778 through 17557119
17717700001 through 17702314
177RG177RG0001 through 177RG0788
18030000 through 32999, 50000 through 50355, and 18051608 through 18052770
18233000 through 34999, 51001 through 51556, and 18254680 through 18265965
18518500968 through 18503458
188188-0001 through 188-0572 and 18800573 through 18803046
190, 1957001 through 7999 and 16000 through 16183
210-5 (205) and
210-5A (205A)
205-0320 through 205-0577
206, 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
20720700001 through 20700414 (except those aircraft with factory installed 24-volt electrical system)
210, T21021058162 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