AD 74-12-06 ACTIVE

74-12-06 LOCKHEED: Amendment 39-1867 as amended by Amendment 39-2512 is further amended by Amendment 39-3361. Applies to all Model 382 series airplanes, Serial Numbers 3946 and 4101 through 4541 certificated in all categories.

Compliance as indicated.

a) For airplanes with 5000 or more hours total time in service on the effective date of this AD comply with paragraph (c) within the next 50 hours time in service, and thereafter at intervals not to exceed 1000 hours time in service from the last inspection.

b) For airplanes with less than 5000 hours total time in service on the effective date of the AD comply with paragraph (c) before the accumulation of 5050 hours total time in service, and thereafter at intervals not to exceed 1000 hours time in service from the last inspection.

c) Inspect outer wing lower forward beam cap, web, and skin for cracks in the area extending from outer wing stations 144 to 165 and 195 to 214, both left and right in accordance with Lockheed Hercules Airfreighter Inspection Procedures, SMP 515-A, Card SP-75, revised October 15, 1978, or in an equivalent manner approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region.

d) Repair of the beam cap shall be in accordance with Lockheed Service Bulletin A382-169, Revision 7, and repair of the beam web in accordance with SMP 583, Lockheed Hercules Structural Repair Manual, or in an equivalent manner approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region.

e) Before the accumulation of 30,000 flight hours, preventive modification shall be installed in accordance with Lockheed Service Bulletin 382-152, Revision 2, and Alert Service Bulletin A382-169, Revision 7, or in an equivalent manner approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region.

f) Recurring inspections shall be performed in accordance with the following:

1) Recurring inspections for unmodified airplanes will be in accordance with paragraphs (a), (b), and (c) of this amendment.

2) Recurring inspections for airplanes with preventive modifications shall be in accordance with Lockheed Airfreighter Inspection Procedures, SMP 515-A, Card SP-75, revised October 15, 1978, or in an equivalent manner approved by the Chief, Engineering and Manufacturing Branch, FAA, Southern Region, and a detailed visual inspection of the front beam lower cap and adjacent structure including modifications across the entire length of the outer wing dry bays from outer wing stations 144 to 214 at each "C" check.

3) In addition to the recurring inspections of paragraphs (f)(1) and (f)(2), recurring inspections for airplanes with repairs shall be a detailed visual inspection of the front beam lower cap and adjacent structure, including repairs, across the entire length of the outer wing dry bays from outer wing stations 144 to 214 at each "C" check.

g) Upon request of the operator, an FAA Maintenance Inspector, subjectto prior approval of the Chief, Engineering and Manufacturing Branch, FAA, Southern Region, may adjust the repetitive inspection intervals specified in this amendment to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator.

h) Airplanes may be flown to a base for performance of the inspections required by this amendment in accordance with Federal Aviation Regulations 21.197 and 21.199.

i) Report inspection findings to Chief, Engineering and Manufacturing Branch, FAA, Southern Region, P.O. Box 20636, Atlanta, Georgia 30320.

Lockheed-Georgia Alert Service Bulletin A382-169, dated May 30, 1974, covers this same subject.

Amendment 39-1867 became effective May 30, 1974.

Amendment 39-2512 became effective February 13, 1976.

This amendment 39-3361 becomes effective December 8, 1978.