Each of the survivors of the 145 Electras built to that time was modified at Lockheed's expense at the factory, the modifications taking 20 days for each aircraft; and the changes were incorporated in subsequent aircraft as they were built.
The changes were incorporated in subsequent aircraft as they were built. Each of the survivors of the 145 Electras built to that time was modified at Lockheed's expense at the factory, the modifications taking 20 days for each aircraft.
Each of the survivors of the 145 Electras built to that time was modified at Lockheed's expense at the factory, the modifications taking 20 days for each aircraft. The changes were incorporated in subsequent aircraft as they were built.
Each of the survivors of the 145 Electras built to that time was modified at Lockheed's expense at the factory, the modifications taking 20 days for each aircraft. The changes were incorporated in subsequent aircraft as they were built.