F404-IN20 engines delivered to Hindustan Aeronautics Limited grew by three more units in August, GE Aerospace said on Thursday. The American engine maker confirmed the shipment in a statement tied to the Light Combat Aircraft Tejas Mk1A programme, whose output has run at the pace of a single overseas propulsion line for well over a year.

HAL has said its Mk1A assembly line stands ready. Engines remain the constraint.

"GE Aerospace shipped three F404-IN20 engines to HAL in August 2026," the firm said. "We are proud to partner with Hindustan Aeronautics Limited and the Indian Air Force to power India's indigenous fighter jets."

The delivery sits inside a wider commitment GE made earlier this year, one that former HAL Chairman DK Sunil laid out in some detail.

F404-IN20 engines delivered against a bigger promise

Sunil said in April that GE had assured a delivery of 20 F404-IN20 engines across the second half of 2026, spanning June to December. He described the number as conservative even by GE's own account.

"We have five engines, the sixth engine is ready now. It will be picked up shortly," Sunil said. "Last time, when I visited GE, the assurance was that they would give us 20 engines in the second half of this calendar year, between June and December. This is the indication from GE and this is a pessimistic number; they have told me they should do better."

Engine availability has been the single biggest factor governing how fast Mk1A aircraft leave the HAL line, the company has said repeatedly. HAL's own production capacity has not been the bottleneck.

Why F404-IN20 supply controls the Tejas Mk1A timeline

Every Mk1A airframe flies on one F404-IN20, sourced from GE and shipped to Bengaluru for fitment. There is no second supplier written into the programme. That single-source design is why a three-engine shipment from Ohio makes news in Delhi.

The F404-IN20 is built to Indian specification rather than pulled off a general shelf, with a higher-flow fan and single-crystal turbine blades rated at roughly 84 kilonewtons in afterburner. HAL's original 2021 order covered 99 of these engines against the first batch of Mk1A airframes, and a further 113 followed in November 2025 for deliveries running out to 2032, according to figures IDW has reported previously.

GE had closed its F404-IN20 line around 2016, after an earlier batch of 65 engines for the original Tejas variant, with nothing further on order at the time. HAL's 2021 contract forced the line back open through the COVID years, and the slow restart is the reason a batch as small as three engines still draws attention now. The Air Force has set a March 2027 target for its first full Mk1A squadron, a date that depends entirely on shipments like Thursday's continuing to arrive.

IDW has tracked the strain on this supply chain closely this year, including GE's move to stand up a dedicated F404-IN20 production line to work through its backlog, and HAL's own account of the shortfall given at Farnborough earlier this year.

180 aircraft riding on engine supply

The Indian Air Force has ordered 180 LCA Mk1A aircraft from HAL, split between fighters and trainers. Every one of them is waiting on the same F404-IN20 pipeline that produced Thursday's three-engine shipment. IDW has separately reported on when the first full squadron might reach the Air Force, a date that shifts with every engine batch GE confirms.

HAL's penalty clause on delayed engines

HAL is also billing GE for the delays already logged. Contractual liquidated damages apply whenever the F404-IN20 schedule slips, HAL officials have said, and the company has been invoking that clause.

"The contract includes a provision stating that if there is a delay in the delivery of F-404 engines for the Light Combat Aircraft, liquidated damages will be imposed on GE Aviation," HAL officials said. "So the cost is being imposed as per the contract."

That penalty runs alongside the deliveries, not instead of them. Both tracks continue at once, with the cost recovery a separate matter from the engines actually reaching Bengaluru.

The count GE is being measured against

Three engines in a single month is a fraction of the 20 GE assured for the back half of the year. With Thursday's batch, the tally of F404-IN20 engines delivered this half is still well short of that promise, and whether the pace climbs before December is the number HAL and the Air Force are both watching now.

GE Aerospace has not given a public schedule for the remaining engines this year. Hindustan Aeronautics Limited and the Indian Air Force have both said the Mk1A programme is otherwise ready to absorb whatever arrives.

Twenty Mk1A airframes were reported built and awaiting engines earlier this year. That backlog is what each new shipment, three engines included, now works against.