| 1. | In 1964 the new owner, Ansett-ANA, again replaced both inner lower booms.
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| 2. | In 1958 the operator, Trans Australia Airlines, replaced both inner lower booms.
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| 3. | The three radioisotope thermoelectric generators ( RTGs ) are mounted end-to-end on the lower boom.
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| 4. | Jim Brady, Connor's navigator, has hit his head twice on Young America's slightly lower boom.
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| 5. | The mandatory retirement life of the lower boom in the inner wing was 11, 400 flights.
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| 6. | The investigation concentrated on determining why the inner lower boom had failed at 70 % of its retirement life.
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| 7. | The upper boom connects the shoulder and elbow joints, and the lower boom connects the elbow and wrist joints.
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| 8. | These two cracks grew to affect 85 % of the cross-sectional area of the inner lower boom at Station 143.
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| 9. | This crack eventually affected 45 % of the cross-section of the socket before the lower boom failed on the fatal flight.
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| 10. | Re-use of the old fittings relied on the existing holes aligning closely with the bushes in the new inner lower booms.
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