Inventories

3 Months Ended

Mar. 31, 2024

Inventories consisted of the following:


	March 31 2024	December 31 2023
Commercial aircraft programs	$72,505	$68,683
Long-term contracts in progress	538	686
Capitalized precontract costs(1)	897	946
Commercial spare parts, used aircraft, general stock materials and other	9,531	9,426
Total	$83,471	$79,741

(1) Capitalized precontract costs at March 31, 2024 and December 31, 2023 included amounts related to KC-46A Tanker, Commercial Crew, and T-7A Red Hawk Production Options. See Note 9.

Commercial Aircraft Programs

At March 31, 2024 and December 31, 2023, commercial aircraft programs inventory included the following amounts related to the 737 program: deferred production costs of $6,794 and $6,011 and unamortized tooling and other non-recurring costs of $872 and $792. At March 31, 2024, $7,635 of 737 deferred production costs, unamortized tooling and other non-recurring costs are expected to be recovered from units included in the program accounting quantity that have firm orders, and $31 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

At March 31, 2024 and December 31, 2023, commercial aircraft programs inventory included the following amounts related to the 777X program: $5,337 and $4,638 of work in process, $2,160 and $1,792 of deferred production costs and $4,139 and $4,063 of unamortized tooling and other non-recurring costs. We expensed abnormal production costs of $126 during the three months ended March 31, 2023. In the fourth quarter of 2023, the 777X program resumed production, and as a result, there were no abnormal production costs during the three months ended March 31, 2024.

At March 31, 2024 and December 31, 2023, commercial aircraft programs inventory included the following amounts related to the 787 program: deferred production costs of $12,107 and $12,384, $1,606 and $1,764 of supplier advances, and $1,443 and $1,480 of unamortized tooling and other non-recurring costs. At March 31, 2024, $11,601 of 787 deferred production costs, unamortized tooling and other non-recurring costs are expected to be recovered from units included in the program accounting quantity that have firm orders, and $1,949 is expected to be recovered from units included in the program accounting quantity that represent expected future orders. We expensed abnormal production costs of $80 and $379 during the three months ended March 31, 2024 and 2023.

Commercial aircraft programs inventory included amounts credited in cash or other consideration (early issue sales consideration) to airline customers totaling $4,558 and $4,126 at March 31, 2024 and December 31, 2023.