Fighter Aircraft:

Better Cost Estimates Needed for Extending the Service Life of Selected F-16s and F/A-18s

GAO-13-51: Published: Nov 15, 2012. Publicly Released: Nov 15, 2012.

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John H. Pendleton
404-679-1816
pendletonj@gao.gov

 

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What GAO Found

The Air Force plans to upgrade and extend the service life of 300 F-16 aircraft and the Navy 150 F/A-18 aircraft, at a combined cost estimated at almost $5 billion in fiscal year 2013 dollars.

  • The Air Force plans to extend the service life of selected F-16s by 2,000 flying hours each as well as install capability upgrades such as an improved radar. The Air Force estimates that it will complete this work by 2022 at a cost of $2.61 billion. About 28 percent of the projected costs are included in the Air Force's spending plans through 2017, with the remainder expected to be incurred in 2018-2022.

  • The Navy plans to extend the service life of selected F/A-18s by 1,400 flying hours each and may install capability upgrades on some of the 150 aircraft--such as adding the ability to integrate with newer aircraft. The Navy projects that it will complete the life extension by 2018 at a cost of $2.19 billion, with most of these costs included in its spending plans through 2017, but costs associated with any upgrades are not included in the Navy estimate or in its spending plans.

Air Force and Navy officials told GAO that they could ultimately extend the service life of up to 650 F-16s and 280 F/A-18s if needed to attain desired inventory levels.

The Air Force's and Navy's cost estimates to upgrade and extend the service life of selected fighter aircraft exhibit some characteristics of a high-quality cost estimate but do not reflect all potential costs. The estimates were: well-documented since they identified data sources and methodologies; accurate since they accounted for inflation and were checked for errors; and mostly comprehensive since they included the work planned and identified key assumptions. However, the estimates were not fully credible in part because they did not assess the extent to which the total costs could change if additional work is done or more aircraft are included in the programs. Another factor affecting the credibility of the estimates is that they have not been compared to an independently developed estimate. GAO's past work has shown that such an independent cost estimate is one of the best validation methods since an independent cost estimate tends to be higher and more accurate than a program office estimate. Air Force and Navy officials told GAO that they use Department of Defense and military department guidance that allows for some variation in how the estimates are developed depending on the dollar value and maturity of the program. However, these programs--which are critical to maintain fighter capability and capacity as current inventory ages--total almost $5 billion and the costs will increase if program quantities and scope increase. Without fully credible cost estimates, including an analysis of how much total costs may increase, decision makers will not have visibility into the range of potential costs, which could hinder their ability to formulate realistic budgets and make informed investment decisions.

Why GAO Did This Study

Fighter aircraft are important to achieve and maintain air dominance during combat operations as well as to protect the homeland. DOD plans to replace many of its current fighter fleet with the F-35; however, the F-35 program has experienced numerous delays and cost increases. To maintain fighter capabilities and capacity, the Air Force and Navy have decided to upgrade and extend the service life of selected F-16 and F/A-18 aircraft. In this context, two subcommittees of the House Armed Services Committee asked GAO to (1) describe the Air Force and Navy plans to upgrade and extend the service life of selected F-16 and F/A-18 aircraft; and (2) assess the extent to which cost estimates for these upgrades and life extensions exhibit characteristics of a high-quality cost estimate. GAO obtained documentation of the plans and estimates, compared the estimates to best practices outlined in the GAO Cost Estimating Guide, and assessed factors that could affect total costs.

What GAO Recommends

GAO recommends that the Air Force and Navy follow all best practices to enhance the credibility of the cost estimates for the F-16 and F/A-18 upgrades and life extensions including an assessment of the potential range of costs and seeking independent cost estimates.

For more information, contact John H. Pendleton at 404-679-1816 or pendletonj@gao.gov.

Status Legend:

More Info
  • Review Pending-GAO has not yet assessed implementation status.
  • Open-Actions to satisfy the intent of the recommendation have not been taken or are being planned, or actions that partially satisfy the intent of the recommendation have been taken.
  • Closed-implemented-Actions that satisfy the intent of the recommendation have been taken.
  • Closed-not implemented-While the intent of the recommendation has not been satisfied, time or circumstances have rendered the recommendation invalid.
    • Review Pending
    • Open
    • Closed - implemented
    • Closed - not implemented

    Recommendations for Executive Action

    Recommendation: To improve future updates of Air Force and Navy cost estimates for upgrading and extending the service life of selected F-16s and F/A-18s and to improve the ability of decision-makers to assess the potential total costs, the Secretary of Defense should direct the Secretary of the Air Force to update its cost estimates, and in doing so: (1) include in its sensitivity analysis an assessment of the range of possible costs if the capability-upgrade and service-life extension programs are expanded to more than 300 aircraft including up to the maximum of 650 aircraft, and (2) obtain an independent review of the updated cost estimates.

    Agency Affected: Department of Defense

    Status: Open

    Comments: DOD concurred with the recommendations. In July 2014, DOD canceled the capability upgrade program as part of the fiscal year 2015 budget development process. Regarding the service life extension program, Air Force officials stated that the planned program review was delayed until mid-fiscal year 2015 and planned to conduct a sensitivity analysis and independent review of the cost estimates for the program review. When we confirm the actions taken, we will provide updated information.

    Recommendation: To improve future updates of Air Force and Navy cost estimates for upgrading and extending the service life of selected F-16s and F/A-18s and to improve the ability of decision-makers to assess the potential total costs, the Secretary of Defense should direct the Secretary of the Navy to update its cost estimates and in doing so: (1) include in its sensitivity analysis an assessment of the range of possible costs for extending the service life of other nonstructural components that are becoming obsolete and capability upgrades that may be required for some of the 150 aircraft, and (2) obtain an independent review of the updated cost estimates.

    Agency Affected: Department of Defense

    Status: Open

    Comments: DOD concurred with these recommendations. In January 2014, DOD stated that the Naval Air Systems Command conducted six sensitivity analyses and planned to update its estimates with additional analyses in the annual programming and budgeting cycle. Additionally, according to DOD, the Naval Air Systems Command was consolidating and validating strike fighter requirements in its internal cost review as of January 2014. We are working with DOD to obtain additional information so we can confirm these actions taken by the Navy meet the intent of our recommendations.

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