AD 75-07-07

75-07-07 SIKORSKY AIRCRAFT: Amendment 39-2139. Applies to S-58B, S-58D, S- 58E, S-58F, S-58H, S-58J, S-58BT, S-58DT, S-58ET, S-58FT, S-58HT, S-58JT helicopters certificated in all categories, including Military Type HSS-1, HSS-1F, HSS-1N, HUS-1, HUS- 1A, HUS-1AN, HUS-1G, HUS-1Z, H-34A, H-34C, H-34J, CH-34A, CH-34C, HH-34F, SH-34G, SH-34H, SH-34J, UH-34D, UH-34E, UH-34G, UH-34J, VH-34C, VH-34D, equipped with P/N S14-50-1015 luminescent markers, used to help locate emergency hatch handles in an emergency.

Compliance required within the next 30 calendar days after the effective date of this AD, unless already accomplished.

To prevent operation with leaking luminescent markers, accomplish the following:

(a) Visually inspect emergency hatches in accordance with Section 2., Paragraph A.(1) of Sikorsky Service Bulletin No. 58B50-1A, dated January 14, 1975, to determine if P/N S14-50-1015 luminescent markers are installed. If P/N S14-50-1015 luminescent markers are installed, accomplish paragraphs (1) through (4) below utilizing authorized personnel. Contact one of the following Energy Research and Development Administration (formerly U.S. Atomic Energy Commission, AEC now ERDA) Regional Coordinating Offices for radiological assistance and sources of authorized personnel:

Regional Coordinating Office Post Office Address Telephone for Assistance

Brookhaven Area Office Upton, L.I. New York 11973

516-345-2200

Oak Ridge Operations Office P.O. Box E Oak Ridge Tennessee 37830

615-483-8611, Ext. 3-4510

Savannah River Operations Office P.O. Box A Aiken, S.C. 29801 N. Augusta, S.C. 803-824-6331, Ext. 3333

Albuquerque Operations Office P.O. Box 5400 Albuquerque, New Mexico 57115

505-264-4667

Chicago Operations Office 9800 S. Cass Ave. Arconne, Illinois 60439

312-739-7711 Ext. 2111

Idaho Operations Office P.O. Box 2108 Idaho Falls, Idaho 83401

208-526-0111 Ext. 1515

San Francisco Operations Office 1333 Broadway Oakland, California 94612

415-273-4237

Richland Operations Office P.O. Box 550 Richland, Washington 99352

509-942-7381

(1) Conduct radiation survey for contamination and leakage in accordance with Section 2., Paragraph A(2) of the above service bulletin.

(2) Remove markers in accordance with Section 2., Paragraph A(3) of the above service bulletin.

(3) If contamination is found, decontaminate aircraft in accordance with Section 2., Paragraph A(4) of the above service bulletin.

(4) Dispose of markers and contaminated material, if any, in accordance with Section 2, Paragraph A(5) of the above service bulletin.

(b) Replace luminescent marker P/N S14-50-1015 with a new luminescent U.S. Radium Corp. Luminescent Marker LAB 659(S)-1, or Military Standard Marker MS39099-1 or an FAA approved equivalent part. Install the aforementioned markers at Fuselage Stations 176.0 and 210.0, in accordance with Figure 2, of the above service bulletin. Trim upholstery around the part for adequate clearance. Other equivalent markers and installations may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, New England Region.

(c) 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 persons affected by this directive who have not already received these documents from the manufacturer may obtain copies upon request to Sikorsky Aircraft, Stratford, Connecticut 06602. These documents may also be examined at the Office of Regional Counsel, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803.

This amendment becomes effective April 8, 1975.