| AD Number | 48-27-03 | Status | Active |
| Effective Date | Not specified | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | N/A |
| Product Type | ["Aircraft"] | Product Subtype | ["Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Lockheed Aircraft Corporation |
| Model(s) | 649-79 749-79 |
48-27-03 LOCKHEED: Applies to 649 and 749 Series Airplanes Equipped With Curtiss C632S-A/850-4C2-0 Propellers.
Compliance required by August 1, 1948, and February 1, 1949.
To increase the ability of the propeller hubs to withstand excessive stresses under certain operating conditions the hubs must be returned to Curtiss-Wright Corp., Propeller Division for shotpeening of the threaded portion of the hub barrels. Effective August 1, 1948, hubs not peened before accumulating 2,500 hours of operating time are to be permanently removed from Constellation operation. Hubs not peened before accumulating 2,000 hours of operating time are to be temporarily withdrawn from operation until shotpeened. Peening must be accomplished on all hubs by February 1, 1949, regardless of accumulated operating time.