Retiring a combat aircraft before its replacement is fully ready is not always a planning failure. It is often a deliberate trade-off: short-term capability risk weighed against long-term budget savings, industrial consolidation, or strategic redirection. But good intentions do not close the gap on the flight line, and across multiple branches of the US military, those gaps have ranged from manageable inconveniences to genuine vulnerabilities that analysts are still writing about today.
This article ranks five cases where the United States military retired a proven combat aircraft before its designated successor had achieved full operational capability, drawing from the United States Air Force, US Navy, and MarineCorps.
The Weasel’s Last Hunt: Lockheed Martin F-16CJ Fighting Falcon
The Block 50/52’s Dedicated Wild Weasel Role Was Phased Out Before The F-35A Had Fully Proven It Could Replace It
The General Dynamics (later Lockheed) Martin F-16CJ, the Block 50/52 “Wild Weasel” variant of the Fighting Falcon, equipped with the AN/ASQ-213 HARM Targeting System (HTS) pod, held one of the most hazardous and irreplaceable roles in American tactical aviation for nearly 30 years. Its mission was to fly directly at enemy surface-to-air missile batteries, detect their targeting radars, and suppress them before they could threaten the strike packages following behind. The F-16CJ assumed this Wild Weasel lineage from the retired McDonnell Douglas F-4G Phantom in 1996, continuing a tradition of dedicated radar-killing that stretches back to the skies over North Vietnam in 1965.
The two primary F-16CJ Wild Weasel wings were the 35th Fighter Wing at Misawa Air Base, Japan, and the 52nd Fighter Wing at Spangdahlem Air Base, Germany, both positioned at the geographic frontline of potential peer conflict. But the community’s heart sat stateside. Shaw Air Force Base, South Carolina hosts three active-duty SEAD-postured squadrons under the 20th Fighter Wing — the 55th, 77th, and 79th Fighter Squadrons — and just down the road at McEntire Joint National Guard Base, the South Carolina Air National Guard’s Wild Weasel squadron trains alongside them, sharing the specialized electronic-warfare ranges the mission demands. As documented by Air & Space Forces Magazine, the 35th Fighter Wing currently flies two squadrons of F-16CMs, the Block 50/52 variant outfitted with anti-radiation missiles and radar-tracking targeting pods, and the plan calls for the wing’s 36 F-16CMs to eventually be replaced by 48 F-35As. Notably, unlike the temporary rotational F-35s and F-22s offsetting the retired F-15Cs elsewhere in Japan, these Wild Weasel F-35As are slated for permanent overseas basing.
Capable of exceeding Mach 2 (approximately 1,500 mph / 2,414 km/h) and armed with the AGM-88 HARM missile— weighing 800 pounds (363 kg) with a pre-briefed range of up to 90 miles (145 km) — the F-16CJ could sprint toward a threatening radar site and destroy it faster than the site operator could shut down. The F-35A’s SEAD capability is genuinely different in character: it relies on stealth and the AGM-88G AARGM-ER rather than the Wild Weasel’s high-speed direct engagement model. Per Air & Space Forces Magazine, validating that F-35A Block 4 software could fully replicate the Wild Weasel’s time-critical, reactive SEAD role took considerably longer than the originally assumed transition timeline.
The transition away from the dedicated Wild Weasel model is gradual enough to avoid a single dramatic retirement moment — which is partly why it sits at number five on this list. But its significance is easy to underestimate: SEAD is the mission that makes every other strike mission possible, and approximately 25–30% of all US combat sorties in recent conflicts have involved some form of air defense suppression. The F-35A will ultimately be the superior SEAD platform, but as Simple Flying recently reported, the broader F-16-to-F-35A transition has left the Air Force managing several overlapping capability gaps simultaneously, and the Wild Weasel handover is among the least-discussed of them.
The Tomcat That Couldn’t Be Replaced: Grumman F-14D
Retired In 2006: The Navy’s Long-Range Interceptor Left A Gap That Persists To This Day
The Grumman F-14 Tomcat was retired by the US Navy on September 22, 2006, and what followed was one of the most deliberately irreversible aircraft retirements in American military history. Nearly every single airframe was shredded at Davis-Monthan Air Force Base in Arizona, a decision driven by a very specific security concern: Iran had purchased 80 F-14As in the 1970s and was known to be actively seeking spare parts on the black market. Destroying the retired fleet made that impossible. It also meant there was absolutely no going back, even as analysts later questioned whether the retirement had been premature.
At its peak, the F-14D combined a top speed of Mach 2.34, approximately 1,544 mph (2,485 km/h), with the AN/AWG-9 radar system capable of tracking 24 targets simultaneously and engaging six at ranges exceeding 100 miles (161 km) using the AIM-54 Phoenix missile. No carrier-based aircraft in service today replicates that long-range intercept envelope. Its replacement in the carrier air wing was the Boeing F/A-18E/F Super Hornet, which is an excellent multirole platform but tops out at approximately Mach 1.8 and carries a combat radius roughly 20 percent shorter than the Tomcat’s, as reported by Simple Flying in a detailed head-to-head comparison of the F-14 Tomcat and the F/A-18 Super Hornet. The F-35C Lightning II, which provides the closest thing to a true fifth-generation successor, did not reach Initial Operational Capability until February 2019, 13 years after the Tomcat’s retirement, per Naval Air Systems Command.
The debate over whether the F-14’s retirement was premature has only grown louder as the strategic environment has shifted. The Pacific theater, specifically the threat posed by Chinese long-range anti-ship missiles and H-6 bomber formations operating at extended range from the Chinese mainland, is, in fundamental terms, exactly the threat the F-14 and Phoenix combination was designed to counter. As the Naval History and Heritage Command has documented, no subsequent carrier-based system has fully replicated the fleet air defense capability the Tomcat provided. As documented by Simple Flying, in May 2026, Congress even passed the “Maverick Act”, voting to restore one F-14D to airworthy condition, a symbolic gesture, but one that speaks to how acutely the gap is felt.
The Jammer That Left No Successor: Northrop Grumman EA-6B Prowler
When The USMC Retired The Prowler In 2019, The Corps Lost Its Organic Electronic Warfare Capability — And Has Never Replaced It
The Northrop Grumman EA-6B Prowler was the US military’s primary dedicated electronic warfare aircraft for nearly five decades, entering service in 1971 and finally being retired by the last US Marine Corps squadron, VMAQ-2 “Death Jesters” at MCAS Cherry Point, North Carolina, in March 2019. The Prowler was a four-seat platform carrying one pilot and three Electronic Countermeasures Officers (ECMOs), capable of loading up to five AN/ALQ-99 tactical jamming pods simultaneously and suppressing enemy radar and communications across an entire theater. It was loud, subsonic at Mach 0.99 (approximately 735 miles per hour or 1,185 km/h), and unglamorous, but it was irreplaceable in denied airspace operations, and nothing the Marines currently operate does what it did.
The Navy’s replacement for the Prowler is the Boeing EA-18G Growler, a highly capable electronic attack derivative of the F/A-18F Super Hornet that entered service in 2009 and has proven itself a generational leap over the EA-6B in speed, range, and avionics. As examined by Simple Flying in its detailed comparison of the EA-6B Prowler and EA-18G Growler, examining what changed, the problem is that the EA-18G is exclusively a Navy asset: it is catapult-launched, carrier-based, and has never been procured by the Marine Corps. The USMC, which conducts expeditionary operations from amphibious assault ships and austere forward bases, has no fixed-wing electronic warfare aircraft whatsoever. When the Prowler retired, the Corps’ answer was that the F-35B’s internal electronic warfare suite would provide self-protection, and Navy Growler support would handle offensive jamming in joint operations.
The critical flaw in that logic is the word “joint.” In a truly independent USMC expeditionary scenario, which is precisely the operational concept the Marine Corps exists to execute, Navy EA-18G support is not guaranteed. The F-35B’s electronic warfare suite is optimized for self-protection, not the offensive, theater-wide suppression of enemy air defenses that the Prowler provided. Analysts at Breaking Defense and the Government Accountability Office have flagged this gap in multiple assessments since 2019, and the Marine Corps has yet to announce a credible organic replacement program.
The Combat Ghost: Lockheed Martin F-22A Raptor Block 20
Some Raptors Were Never Combat-Capable — And Their Sixth-Generation Successor Is Still Years Away
The Lockheed Martin F-22 Raptor is the most capable air-superiority fighter ever built, but within that fleet, not all aircraft are equal. Thirty-three Block 20 Raptors were delivered to the USAF without the avionics software, radar modes, or weapons integration required for combat operations. They have served their entire lives as dedicated training aircraft, absorbing maintenance resources and flying hours while contributing nothing to the USAF’s current combat strength. With operating costs running at approximately $85,000 per flight hour, as reported by Simple Flying, they are among the costliest trainers ever operated.
The Block 20 aircraft are progressively being stood down as the USAF’s 186 combat-coded Block 30/35 Raptors take on a broader range of training duties. Their intended successor in the air-superiority mission is the sixth-generation Boeing F-47 — formerly the Next Generation Air Dominance (NGAD) fighter — publicly unveiled in 2024 and not expected to reach Initial Operational Capability before the early 2030s at the earliest. As the Government Accountability Office has consistently noted in its annual defense acquisition assessments, the USAF’s total F-22 procurement of 187 aircraft, capped far below the 381 originally requested, leaves the air-superiority mission structurally exposed for the remainder of this decade.
The core problem is that the United States’ air-superiority posture rests on an F-22 fleet that was capped at 187 total aircraft due to cost and post-Cold War procurement logic that now looks deeply flawed. The Block 20 retirement removes 33 of those aircraft from any conceivable combat-support role, narrowing the active air-superiority fleet further at precisely the moment when peer competition with China and Russia demands the largest possible credible deterrent. The F-47’s arrival cannot come quickly enough, and current program timelines, which remain classified in their specifics, offer little reassurance that it will arrive before the F-22’s own structural and software limitations begin to close the gap from the other direction.
Jump Jet’s Last Jump: McDonnell Douglas AV-8B Harrier II
The Last Operational Harrier Landed On June 3, 2026 — Its F-35B Replacement Won’t Be Fully Combat-Ready Until 2031
On June 3, 2026, VMA-223 — the “Bulldogs,” the last remaining Harrier squadron in the United States Marine Corps — touched down at Marine Corps Air Station Cherry Point, North Carolina, and parked for the last time. The AV-8B Harrier II had served the Corps since January 1985, and its operational record was exceptional: during Operation Desert Storm alone, AV-8Bs flew 3,380 sorties over 4,083 flight hours while maintaining mission-capable rates above 90 percent, operating from expeditionary fields as close as 35 nautical miles (65 km) to the Kuwaiti border and averaging 23-minute surge turnaround times, according to Seapower Magazine.
Its replacement, the Lockheed Martin F-35B Lightning II, was officially in service. The problem is that “officially in service” and “fully combat-ready” are not the same thing — and in this case, the gap is measured in years. The F-35B is, in raw performance terms, a dramatically superior aircraft. Its Pratt & Whitney F135-PW-600 engine and Rolls-Royce LiftFan generate approximately 43,000 lb (191,000 N) of combined vertical thrust, compared to the AV-8B’s Rolls-Royce Pegasus 11-61 at 23,500 pounds (104,500 N). Its top speed of approximately 1,218 miles per hour (1,960 km/h) is nearly double the Harrier’s 665 miles per hour (1,070 km/h). But the F-35B’s defining capability is its role as a networked command node within the Marine Corps’ “Kill Web,” fusing data from drones, ships, and ground forces into a single tactical picture. That ability depends entirely on the Technology Refresh 3 (TR-3) software block. The Pentagon’s Director of Operational Test & Evaluation, in its most recent assessment available at dote.osd.mil, confirmed that the TR-3 block will not be fully stabilized until 2031. Simple Flying has a detailed account of exactly what the Marine Corps loses in the trade from the AV-8B to the F-35B.
The result is a documented capability gap that the USMC has acknowledged: without TR-3 software, the F-35B cannot execute the networked strike role used to justify the Harrier’s retirement. By the end of 2026, the Corps will have received 205 F-35Bs of a planned 420 — numerically short of its program of record and operationally short of full software capability, while having just permanently retired the aircraft it replaced. The Harrier’s core strengths, such as ruggedness, rapid sortie generation, ease of maintenance at austere forward bases, and the ability to land vertically, refuel, rearm, and relaunch in minutes, are precisely the attributes the F-35B has yet to demonstrate at scale in the expeditionary environments the Marine Corps was built to fight in. By independent estimates, the gap will not close before 2029 at the earliest.
