AD 90-16-04

90-16-04 McDONNELL DOUGLAS: Amendment 39-6613. Docket No. 89-NM-198-AD.

Applicability: Model DC-10 and KC-10 series airplanes, certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent structural failure, accomplish the following:

A. Except as provided in paragraph C., below, within the threshold for inspections specified in the service bulletins listed in Table 2.1 of "DC-10/KC-10 Aging Aircraft Service Action Requirements Document," McDonnell Douglas Report No. MDC-K1571, Revision A, dated February 28, 1990 (hereafter referred to as "The Document"), or within one repetitive inspection period specified in those service bulletins after the effective date of this AD, whichever is later, inspect for cracks in accordance with those service bulletins. Repeat these inspections at intervals specified in the service bulletins listed in Table 2.1 of The Document.

1. If cracks are found during any inspection,prior to further flight, either accomplish the terminating modification in accordance with the applicable service bulletin, or repair in accordance with data approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: Detection of discrepancies other than cracking necessitates appropriate corrective action in accordance with the provisions of Part 43 of the Federal Aviation Regulations (FAR).

2. Modification in accordance with paragraph B. of this AD terminates individual inspection requirements of the applicable service bulletin.

B. Except as provided in paragraph C., below, prior to reaching the incorporation thresholds listed in The Document or within the next 4 years after the effective date of this AD, whichever occurs later, accomplish the structural modifications specified in the service bulletins listed in Table 2.1 of The Document.

NOTE: The modifications required by this paragraph do not terminate the inspection requirements of any other AD unless that AD specifies that any such modification constitutes terminating action for the inspection requirements.

C. For McDonnell Douglas Service Bulletins A30-37, 30-38, 53-16, 53-19, 53-25, 54-11, 54-27, 54-33, 55-2, and 57-7, listed in Table 2.1 of The Document, within the threshold for inspections listed in Table 2.1 of The Document under "S/B Change Required" or within one repetitive inspection period specified in Table 2.1 of The Document under "S/B Change Required" after the effective date of this AD, whichever is later, inspect for cracks in a manner approved by the Manager, Los Angeles Aircraft Certification Office. Repeat these inspections at intervals specified in Table 2.1 of The Document under "S/B Change Required."

1. If cracks are found during any inspection, prior to further flight, either accomplish the terminating modification in accordance with the applicable service bulletin, or repair in accordance with data approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

2. Modification in accordance with paragraph D., of this AD terminates individual inspection requirements of the applicable service bulletin.

D. Within 4 years after the effective date of this AD accomplish the structural modifications stipulated in the service bulletins specified in paragraph C., above.

E. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Los Angeles Aircraft Certification Office, FAA, Northwest Mountain Region.

NOTE: The request should be forwarded through an FAA Principal Maintenance Inspector (PMI), who will either concur or comment and then send it to the Manager, Los Angeles Aircraft Certification Office.

F. 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.

The inspections and modifications shall be done in accordance with the "DC-10/KC-10 Aging Aircraft Service Action Requirements Document," McDonnell Douglas Report No. MDC-K1571, dated February 28, 1990, which incorporates the following list of effective pages:

Page Number Revision Number Date Page i (Cover) Revision A February 28, 1990 Page ii (Original) September 12, 1989 Pages iii - vi Revision A February 28, 1990 Pages vii - viii Revision A February 28, 1990 Page 1 (Original) September 12, 1989 Page 2 Revision A February 28, 1990 Page 3 (Original) September 12, 1989 Pages 4 - 15 Revision A February 28, 1990 Page 16 (Original) September 12, 1989 Pages 17-20 Revision A February 28, 1990 Pages 21-22 (Original) September 12, 1989 Page 23 Revision A February 28, 1990

This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies maybe obtained from McDonnell Douglas Corporation, 3855 Lakewood Boulevard, Long Beach, California 90806, Attention: Director, Publication and Training, C1-750 (54-60). Copies may be inspected at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington; at the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California; or at the Office of the Federal Register, 1100 L Street, N.W., Room 8301, Washington, D.C.

This amendment (39-6613, AD 90-16-04) becomes effective on September 10, 1990.