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maintenance training manual: United Air Lines, Lyle A. Dringenberg, training
| Date: | 1966-1979 |
| Medium: | Paper, ink |
| Credit Line: | In memory of Lyle A. Dringenberg |
| Accession Number: | 2024.079.112 |
| Dimensions: | 11 x 10 x 2 inches (27.9 x 25.4 x 5.1 cm) |
| Collection: | Aviation Archive |
| Category: | Employee Career History |
| Subcategory: | Other, Employee Career History |
| airline: | United Air Lines |
| airport: | San Francisco International Airport |
| company: | United Airlines |
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<div id="sfomuseum-image-1930921585" class="sfomuseum-image" style="max-width:640px; margin:auto 0;">
<a href="https://collection.sfomuseum.org/objects/1930797619/"><img src="https://static.sfomuseum.org/media/193/092/158/5/1930921585_ohJN9J5B5bedt8mopNr1nZUh3pxY80aR_z.jpg" alt="maintenance training manual: United Air Lines, Lyle A. Dringenberg, training" /></a>
<div id="sfomuseum-image-caption-1930921585" class="sfomuseum-image-caption" style="margin-top:1rem; font-style:italic;">
<div><strong>Maintenance training manual: United Air Lines, Lyle A. Dringenberg, training</strong> 1966-1979</div>
<div>In memory of Lyle A. Dringenberg</div>
<div>Collection of SFO Museum <a href="https://collection.sfomuseum.org/objects/1930797619/">2024.079.112</a></div>
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</div>
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{{cite web |url=https://collection.sfomuseum.org/objects/1930797619/ |title=maintenance training manual: United Air Lines, Lyle A. Dringenberg, training |author=San Francisco International Airport Museum |accessdate=11 January 2026 |publisher=San Francisco International Airport Museum}}
















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