ATSB Aviation Disaster Relief Loan Guarantee Program

The ATSB Aviation Disaster Relief Loan Guarantee Program was the federal government's emergency credit backstop for U.S. airlines after the September 11, 2001 terrorist attacks — a one-time, closed program that guaranteed up to $10 billion in private loans to financially distressed air carriers, administered by the Air Transportation Stabilization Board (ATSB) under rules codified at 14 CFR Part 1300. The program is now closed, but it remains the clearest template the U.S. has for sector-specific emergency airline credit — and its design directly shaped the CARES Act aviation loans of 2020.

Congress passed the Air Transportation Safety and System Stabilization Act (ATSSA), Pub. L. 107-42, within ten days of 9/11 — one of the fastest major legislative responses to a national emergency in modern history. ATSSA did two things simultaneously: it sent up to $5 billion in direct cash compensation to airlines for losses from the FAA-ordered ground stop (Title I, § 101), and it authorized the ATSB to guarantee up to $10 billion in private loans to carriers that needed additional liquidity (§ 102). The guarantee program was not a bailout in the colloquial sense — airlines still had to borrow from private lenders and repay in full — but the federal guarantee dramatically lowered the interest rates they could access.

Current Rule (2026)

What This Rule Does

Part 1300 established the framework under which the ATSB received applications, evaluated financial need and creditworthiness, negotiated guarantee terms, and documented loans. The program was explicitly emergency and temporary — ATSSA codified it as a note to 49 U.S.C. § 40101 rather than making it a permanent addition to aviation statutes, signaling that Congress did not intend to create a standing federal credit facility for airlines.

The key design choice was that the guarantee ran to the private lender, not to the airline. The government did not lend money directly; it promised to make the lender whole if the airline defaulted. This preserved private-market discipline — lenders still had to agree on terms and retained some credit risk — while removing enough risk to allow distressed carriers to borrow at all.

Between 2001 and 2003, the ATSB approved guarantees for seven carriers: America West, US Airways, ATA Airlines (American Trans Air), Aloha Airlines, Frontier Airlines, Evergreen International Airlines, and World Airways. Total guaranteed principal was approximately $1.18 billion — roughly 12 cents on the dollar of the $10 billion ceiling. The Board rejected or declined to act on substantially more applications, including several from major network carriers. Airlines that could access credit on reasonable private terms (or that were too financially distressed to meet ATSSA's criteria) did not receive guarantees.

The program is now fully wound down. Most guaranteed loans were repaid in full. A small number of carriers — including ATA and Aloha — subsequently failed; the government bore losses on those guarantees. The net cost to taxpayers is difficult to isolate precisely because it depends on how you value the government's recovery of warrant proceeds versus losses on failed carriers.

Key Mechanics

To receive a federal loan guarantee under Part 1300, a carrier had to clear three hurdles that the ATSB evaluated on a case-by-case basis:

Eligibility (§ 1300.11): The applicant had to be an "air carrier" as defined in 49 U.S.C. § 40102 — a U.S. citizen operating aircraft in air transportation. More importantly, the carrier had to demonstrate that its financial distress was caused by the 9/11 attacks, not by pre-existing problems. The ATSB examined each applicant's financial condition before September 11 to establish a baseline, then evaluated whether the attacks were the but-for cause of the liquidity crisis. Carriers that were already struggling — as several legacy airlines were, given the difficult years before 9/11 — had to show that the attacks materially worsened an otherwise viable business. This was a genuinely contested judgment call, and several high-profile applications failed on this criterion.

The three-part standard (§ 1300.10): Even eligible carriers had to satisfy three additional findings before the ATSB would approve a guarantee:

1. Credit was not reasonably available from conventional commercial sources on reasonable terms
2. The guarantee was sufficiently secured by collateral the carrier could offer
3. The guarantee was necessary to maintain a safe, efficient air transportation system

The third criterion — necessity for the air transportation system — gave the Board substantial discretion to consider whether a particular carrier's failure would harm consumers or leave routes underserved. Small regional carriers serving remote communities had a different argument to make than large network carriers operating routes served by multiple competitors.

Terms and equity warrants (§ 1300.15): Guaranteed loans had to require full repayment of principal and interest. More consequentially, the ATSB could — and did — require carriers to grant the government warrants or other equity instruments as compensation for the guarantee. America West, for example, issued warrants for approximately 5.3% of its fully diluted common stock. When America West merged with US Airways in 2005 and the combined company's stock recovered, the government was able to sell those warrants at a profit. This warrant requirement became a model for later emergency lending debates: it answers the political question of "why should taxpayers backstop private companies?" by giving the public an upside if the company recovers.

The companion rule at 14 CFR Part 1310 governed the ATSB's internal procedures — Board composition (Federal Reserve Chairman as chair, with Treasury and DOT as voting members; the Comptroller General as a nonvoting observer), quorum requirements (two voting members), and the Board's authority to modify outstanding guaranteed loans through covenant waivers, maturity extensions, or collateral substitutions.

How It Affects You

If you fly frequently or work in aviation: This program directly shaped which airlines survived the post-9/11 crisis and which did not. America West — which received a $380 million guarantee — survived and eventually merged into today's American Airlines. Aloha Airlines received a guarantee but still failed in 2008; its closure affected inter-island Hawaii routes significantly. If you traveled in the mid-2000s, the airline market you were booking into was partly a product of which carriers the ATSB decided to backstop.

If you invest in airline stocks or airline debt: The ATSB program established that the federal government views the airline industry as systemically important enough to warrant emergency credit support in a national crisis — but it is not a standing backstop. Each intervention requires new statutory authority (as the CARES Act demonstrated in 2020). This means airline bondholders and equity investors should factor in both the possibility of emergency federal support and the reality that support is politically contingent, typically comes with equity dilution (warrants), and is conditioned on the carrier demonstrating it was viable before the crisis. Airlines with weak pre-crisis balance sheets are less likely to qualify.

If you study emergency credit programs or policy design: The ATSB program is the canonical domestic template for sector-specific emergency loan guarantees. Its core design choices — guarantee runs to lender not borrower, borrower must prove private credit unavailability, equity warrants as government compensation, explicit temporary and emergency character — were explicitly referenced in the design of CARES Act aviation support in 2020. The CARES Act ultimately chose a mix of grants (for worker payroll via the Payroll Support Program) and direct Treasury loans rather than reactivating the ATSB guarantee structure, but the ATSSA framework informed those choices. If Congress faces another aviation emergency, Part 1300 will be the first document analysts pull.

If you are a researcher tracking government losses on emergency programs: The ATSB program's fiscal outcome is genuinely mixed and somewhat difficult to measure. The warrant proceeds from America West and other carriers that recovered offset some costs, but ATA Airlines (which failed in 2008) and others resulted in losses. GAO reviewed the program's administration multiple times. The net government position likely came out close to cost-neutral or with modest losses — far better than critics predicted during the program's controversy — but the precise figure depends on discount rates and warrant valuation methodology.

Legal Authority

• Air Transportation Safety and System Stabilization Act (ATSSA), Pub. L. 107-42, § 102 (Title I) — authorized the ATSB to provide loan guarantees to air carriers suffering financial losses directly resulting from the September 11 attacks; established Board composition (DOT Secretary, Federal Reserve Chairman, Treasury Secretary, Comptroller General) and the $10 billion ceiling
• 49 U.S.C. § 40101 — general statement of aviation policy; ATSSA's loan guarantee provisions were codified as a note to § 40101 rather than as a permanent addition to the title, reflecting the program's emergency character
• 14 CFR Part 1300 — implementing regulations for the guarantee program (eligibility, standards, application process, loan terms)
• 14 CFR Part 1310 — administrative regulations governing ATSB governance, Board procedures, and authority to modify outstanding guaranteed loans

Recent Rulemakings

No amendments. Part 1300 was adopted as an emergency rule in October 2001 and was never amended — the program closed as guaranteed loans were repaid or resolved over the 2002–2007 period. The ATSB has not held formal meetings or taken formal actions since approximately 2007.

The most significant development since the program wound down was the CARES Act (2020), which Congress designed in part by studying ATSSA's architecture. The CARES Act chose not to reactivate the ATSB; instead, it created the Aviation Manufacturing Jobs Protection program and authorized Treasury to make direct loans under § 4003(b) to passenger air carriers, cargo carriers, and related businesses. The direct-loan structure (rather than a guarantee-to-lender structure) reflected lessons from ATSSA: direct loans are administratively simpler and give the government more direct leverage over borrower conduct.

Pending Action

No pending legislation or rulemaking. The ATSB is not active and Part 1300 has not been amended since its 2001 emergency adoption. Any future aviation emergency credit program would likely require new statutory authority modeled on — but not amending — ATSSA. The CARES Act (2020) established a separate Aviation Manufacturing Jobs Protection program and Treasury direct loans under § 4003(b) rather than reactivating the ATSB framework.

The question of whether the United States should have a standing aviation emergency credit facility — rather than improvising one every crisis — has been discussed in aviation policy circles but has not advanced legislatively. The 2001 and 2020 experiences suggest Congress prefers to authorize emergency aviation support case-by-case rather than create a permanent lending facility analogous to the Export-Import Bank.