81-24-04 SWEARINGEN: Amendment 39-4261. Applies to the following airplane models approved for flight into known icing: Model SA226-T (Serial Numbers T-205E; T-215E, T-201 through T-275 and T-277 through T-291); Model SA226-T(B) (Serial Numbers T-276; T-303E; and T-292 through T-419); Model SA226-AT (Serial Numbers AT-003E, AT-038E, AT-062E, AT-064E, and AT-001 through AT-419); and Model SA-226-TC (Serial Numbers TC-211E, TC-211EE, TC-211EEE, TC-211EEEE, TC-202E, TC-208E, TC-215E, TC-222E, TC-222EE, TC-227E, TC-228E, TC-229E, TC-234E, TC-237E, TC-238E, TC-239E, TC-255E, TC-246E, and TC-201 through TC-419) airplanes. (Airworthiness Directive Docket No. 81-ASW-37.)
Compliance is required within the next 10 hours' time in service after the effective date of this AD unless already accomplished.
To prevent operation in icing conditions wherein ice shed from the propeller spinner could be ingested into the engine inlet, resulting in flameout and subsequent total loss of engine power, accomplish the following:
(a) Strike from the Type of Operations paragraph in the Operation Limitations Section of the FAA approved Airplane Flight Manual the words, "and icing conditions."
(b) Install a placard, minimum 1/4 inch lettering, on the instrument panel in plain view of the pilot stating, "Flight into known icing conditions prohibited."
NOTE: Installation of an auto ignition system in accordance with Fairchild Swearingen Corporation Service Bulletin SB 74-002 dated October 22, 1981, removes the limitations in (a) and (b) above.
(c) Any alternate equivalent method of compliance with this airworthiness directive must be approved by the Chief, Engineering and Manufacturing Branch, Flight Standards Division, Southwest Region, Federal Aviation Administration.
The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All personsaffected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Director of Product Support, Fairchild Swearingen Corporation, P.O. Box 32486, San Antonio, Texas 78284. These documents may also be examined at the Office of the Regional Counsel, Southwest Region, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas, and at the FAA Headquarters, 800 Independence Avenue, SW., Washington, D.C. A historical file on this AD, which includes the incorporated material in full, is maintained by the FAA at their headquarters in Washington, D.C., and at the Southwest Regional Office in Fort Worth, Texas.
This amendment becomes effective November 19, 1981.