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| # | Letters of Interpretation |
|---|---|
| 1 | - 1926.551 - Hooking and Unhooking Loads with a Helicopter During Work on Electric Transmission Systems |
| 2 | - 1926.551 - Line maintenance on a de-energized transmission line. |
| 3 | - 1926.551(l) - Using a helicopter to set an electrical transmission tower. |
| 4 | - 1926.551(i) - "Hooking and Unhooking Loads from Hovering Helicopters". |
| # | Regulations |
|---|---|
| 1 | - 1926.551 - Helicopters. |
| # | Federal Register |
|---|---|
| 1 | - 1926.551 - 37:24880 - Helicopters |
