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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]  
Other Commitments Additional information regarding the Company's delivery schedule is included in the following table as of March 31, 2022:
The Boeing Company
-7 Firm Orders-8 Firm Orders-7 or -8 OptionsTotal
202272 15 27 114 
202364 — 26 90 
202430 — 56 86 
202530 — 56 86 
202615 15 40 70 
202715 15 6 36 
202815 15 — 30 
202920 30 — 50 
203015 45 — 60 
2031— 10 — 10 
276(a)145(b)211632

(a) The delivery schedule for the -7 is dependent on the FAA issuing required certifications and approvals to Boeing and the Company. The FAA will ultimately determine the timing of the -7 certification and entry into service, and the Company therefore offers no assurance that current estimations and timelines are correct. The Company entered into an agreement with Boeing in April 2022 to replace the majority of its -7 firm orders with -8 firm orders in the short-term, among other adjustments to its near-term order book.
(b) The Company has flexibility to designate firm orders or options as -7s or -8s, upon written advance notification as stated in the contract.