AD 82-27-04

82-27-04 MCDONNELL DOUGLAS: Amendment 39-4526. Applies to McDonnell Douglas Model DC-8 Series 70 airplanes as modified by Camma Corp. STC SA1343NM which installs air cycle air conditioning systems.

Compliance required as indicated, unless previously accomplished.

To prevent moisture from freezing in the pitot lines in the turbo-compressor compartment which may result in inaccurate airspeed information, accomplish the following:

A. Within 30 days after the effective date of this AD, install pitot line strip heaters in accordance with McDonnell Douglas DC-8 Alert Service Bulletin A30-39, Revision 1, dated October 21, 1982, or later revisions approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The FAA, Director of Flight Operations has authorized an extension to the pitot heat monitoring system requirements of FAR 121.342(b) to April 12, 1983, for these airplanes.

B. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD.

C. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

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 McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90846, Attention: Director, Publications and Training, C1-750 (54-60). These documents also may be examined at FAA, Northwest Mountain Region, 17900 Pacific Highway South, C-68966, Seattle, Washington 98168, or Los Angeles Aircraft Certification Office, 4344 Donald DouglasDrive, Long Beach, California 90808.

This amendment becomes effective January 3, 1983.