AD 90-13-09

90-13-09 BOEING: Amendment 39-6615. Docket No. 90-NM-85-AD.

Applicability: Certain model 747-100, -100B, -200B, -200C, -300, and 747SR series airplanes; equipped with BFGoodrich door 3 lower door cover Part Number (P/N) 5A2789, installed in accordance with Supplemental Type Certificate (STC) SA886GL or STC SA887GL; certificated in any category.

Compliance: Required as indicated, unless previously accomplished.

To prevent failure of the door 3 evacuation system, accomplish the following:

A. Within 60 days after the effective date of this AD, accomplish the following: 1. Modify the BFGoodrich door 3 lower door cover P/N5A2789, in accordance with Paragraph 2.A. of the "Accomplishment Instructions" of BFGoodrich Alert Service Bulletin No. 25-229, dated February 28, 1990.

NOTE: This AD does not require the replacement of door boost actuators.

2. Inspect the door 3 lower liner bungee cord assembly, P/N 3A3382-1, for proper dimensions, 32.00 plus/minus .50 inches long and 1/4 inch in diameter. Bungee cords which do not meet these dimensions should be replaced prior to further flight.

B. After accomplishment of paragraph A.1., above, identify the reworked lower door cover by rubber ink stamping "SB-25-229" on the inside of the lower door liner, in accordance with BFGoodrich Alert Service Bulletin 25-229, dated February 28, 1990. Do not obliterate the existing part number.

C. 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, FAA, Northwest Mountain Region.

D. 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.

All persons affected by this directive who have not already received the appropriate service information from the manufacturer may obtain copies upon request to BFGoodrich Company, Aircraft Evacuation Systems, 3414 South 5th Street, Phoenix, Arizona 85040. This information may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 17900 Pacific Highway South, Seattle, Washington, or the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California.

This amendment (39-6615, AD 90-13-09) becomes effective on June 29, 1990.