- Model
- 49-46
- Data sheet
- TCDSA-763
- Registered aircraft
- 1 matched by model
- Product
- Aircraft · Large airplane
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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|---|---|---|---|
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On this page
The airworthiness directive
47-10-36 LOCKHEED: (Was Service Note 7 of AD-763-3.) Applies to All Model 49 Serial Numbers Up to and Including 2088.
Between the edges of the inboard and outboard nacelle attach angles, the rivets used to attach the leading edge lower skin to the front beam should be inspected for looseness at periods not to exceed 200 hours of operation. When loose rivets are found the following corrective action should be taken:
Add stiffener to lower surface of leading edge skin between Stations 287 and 299, install 5/32-inch rivets in place of existing 1/8-inch rivets used to attach lower leading edge skin to front beam between Station 287 and outboard nacelle, and install six 10-32 screws in place of six rivets in this same rivet line (two each at Stations 263, 287, and 312). After this rework has been accomplished, no further periodic inspections will be required.
(LAC Service Instruction 49/SI-121 covers this wing leading edge reinforcement and rivet replacement.)
Affected TCDS · 1
The type certificate data sheets for the models this AD names, matched by model and maker.
Registered aircraft · 1
Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.