Important: To keep the spreadsheet from growing too large, I plan to only keep the updates from the current year and the previous two calendar years. This means that in the version to be released on 1/31/24, the 2021 updates tab will be gone. If you care about those updates, make sure you save a copy of this month's spreadsheet!

The December update is up! Here are the key highlights:

• There is a new sheet: Ship #s and seat counts, for those who like to geek out about those things.
• 10 new planes were delivered: 3 A223s, 3 A321neos, 2 A339neos, and 2 E75s owned by OO that will be placed into DL connection service.
• 9 planes flew their first revenue flight for DL: 3 new A223s, 3 new A321neos, 1 new A339neo, and 2 used B739ERs.
• 3 previously unretired B712s re-entered revenue service.
• 1 B763ER exited PS mods.
• The last B763ER entered PS mods.
• 1 B763ER was retired. This is the first mainline plane retired since 2020.
• A couple of OO CR2s did end up flying revenue flights for DL in December besides what was supposed to be their last flight (EKO-SLC on 12/1). I'm assuming they're all retired now and 5 have December retirement dates in the sheet.
• 3 OO-owned CR7s switched from AA to DL.

Details are in the spreadsheet. The link is the same as before and the same as in the Wiki, but here it is for completeness:

https://drive.google.com/file/d/1ifw...ew?usp=sharing

Enjoy, and happy New Year!