| AD Number | 81-01-03 | Status | Active |
| Effective Date | January 05, 1981 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-4002 |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Lockheed Martin Corporation |
| Model(s) | L-1011-385-1 L-1011-385-1-14 L-1011-385-1-15 L-1011-385-3 |
81-01-03 LOCKHEED-CALIFORNIA: Amendment 39-4002. Applies to Model L-1011-385- 1, L-1011-385-1-14, L-1011-385-1-15, and L-1011-385-3 series airplanes certificated in all categories.
Compliance required as indicated, unless already accomplished.
To prevent crack development, which could result in flutter, accomplish the following:
I. Aircraft with Extended Span Wing.
A. Inspect all aircraft within 300 hours' time in service, after the effective date of this Airworthiness Directive, by accomplishing the following:
1. At OWS440 and 476, visually inspect the Hi-Tigues attaching outboard aileron support fittings to wing box lower skin, and rear spar web and caps, for cracks in accordance with Lockheed Service Bulletin 093-57-143, dated November 7, 1980. Pay particular attention to the fitting at the necked-down area near the top.
a. If cracks are found, repair or replace parts before further flight.
b. If Hi-Tigues are 3/16-inch diameter, replace with 1/4- inch diameter Hi-Tigues before further flight.
2. If Hi-Tigues are 1/4-inch or larger diameter, repeat inspection of (1.) above at intervals not to exceed 800 hours' time in service until the outboard aileron support fitting PN 1529413 is replaced with fitting PN 1633849 in accordance with Service Bulletin 093- 57-144 dated October 30, 1980.
II. Aircraft with Standard Span Wing.
A. Inspect all aircraft within 800 hours' time in service, after the effective date of this Airworthiness Directive, by accomplishing the following:
1. At OWS440 and 476, visually inspect Hi-Tigues attaching outboard aileron support fitting to wing box lower skin, and rear spar web and caps, for cracks in accordance with Lockheed Service Bulletin 093-57-143, dated November 7, 1980. Pay particular attention to the fitting at the necked-down area near the top.
a. If cracks are found, repair or replace parts before further flight.
b. If Hi-Tigues are 3/16-inch diameter, replace with 1/4- inch diameter Hi-Tigues in accordance with Lockheed Service Bulletin 093-47-143 dated November 7, 1980, or modify in accordance with Service Bulletin 093-47-144, within 3,000 hours' time in service, after the effective date of this Airworthiness Directive.
2. Upon accumulation of 10,000 or more hours time in service, repeat the inspection of (1.) above at intervals not to exceed 4,000 hours time in service until the outboard aileron support fitting PN 1529413 with fitting PN 1633849 in accordance with Service Bulletin 093-47-144, dated October 30, 1980.
III. Alternative inspections, modifications, or other actions which provide an equivalent level of safety may be used when approved by the Chief, Los Angeles Area Aircraft Certification Office, FAA Northwest 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 may obtain copies upon request to Lockheed-California Company, Post Office Box 551, Burbank, California 91520, Attention: Commercial Support Contracts. These documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108 or 15000 Aviation Boulevard, Hawthorne, California 90261, Room 6W14.
This amendment becomes effective January 5, 1981.