80-12-14 PIPER (TED SMITH): Amendment 39-3801. Applies to Aerostar Model 600, 601, 601P Serial Nos. 0001 through 0799 airplanes certificated in all categories.
Compliance required as indicated, unless already accomplished.
To prevent the reentry of an engine fire into the underwing structure behind the engine nacelle, accomplish the following:
(a) Within the next 300 hours' time in service, or ninety days after the effective date of this AD, whichever occurs sooner, install a metal fairing, P/N 230090-1 and -2, in place of the existing fiberglass fairing, P/N 230023-501 and 502, in accordance with Piper Service Bulletin So 600-83, dated November 21, 1979.
(b) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of the modification required by this AD.
(c) Alternative inspections, modifications or other actions which provide an equivalent level of safety may be used when approved by the Chief, Aircraft Engineering Division, FAA Western Region.
This amendment becomes effective June 19, 1980.