74-18-15 LEIGH SYSTEMS: Amendment 39-1942 as amended by Amendment 39-2068. Emergency Locator Transmitter Leigh Systems Sharc 7 Series. Applies to Leigh Systems Sharc 7 Series Serial Nos. 1000-24000 Emergency Locator Transmitter.
Compliance required as indicated:
As a result of magnesium battery gassing and the possibility of lightning strike or static electricity buildup igniting the mixture resulting in the rupture and activation of the Emergency Locator Transmitter accomplish the following:
(a) Unless already accomplished, within the next 90 days after the effective date of this A.D. disconnect the ELT antenna at the ELT electronic unit. Install Leigh Systems Part No. 04 05 002 Static Electricity Suppresser in the coaxial line between the antenna and the electronic unit. Units equipped with magnesium batteries may be determined by weight shown on unit identification tag as 2.3 pounds.
(b) Aircraft may be flown to a base where the maintenance required by this A.D. may be performed as permitted by FAR 91.52(e)(2).
(c) Upon request with substantiating data submitted through an FAA inspector the compliance time specified in this A.D. may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.
Amendment 39-1942 was effective September 3, 1974.
This amendment 39-2068 is effective January 23, 1975.