The Federal Government has allocated a cumulative N10.61bn for the overhaul of engines on the Gulfstream G550 aircraft assigned to Vice President Kashim Shettima over a three-year period, an analysis of appropriation bills from 2024 to 2026 has revealed.

The aircraft, registered as 5N-FGW, received the highest single allocation among all engine overhaul projects in the Presidential Air Fleet, accounting for 55 per cent of the N19.27bn total spent on engine maintenance across the fleet under the President Bola Tinubu administration.

Budget documents obtained and analysed by The PUNCH show that the allocation for overhauling the vice president’s aircraft engines jumped from N1.24bn in 2024 to N5.51bn in 2025—a 345 per cent increase—before settling at N3.86bn in 2026.

The 2024 Appropriation Bill listed the project under code ERGP31206170 as “Overhaul of 5N-FGW Engines” with a “NEW” status and an allocation of N1.24bn. By 2025, the project’s status changed to “ONGOING” with the allocation rising to N5.51bn, before declining to N3.86bn in 2026 while maintaining its “ONGOING” status.

The 13-year-old Gulfstream G550, which flies under the call sign “Nigerian Air Force 2” when carrying the vice president, has been plagued by technical faults that have led to cancellations of Shettima’s international trips in the past.

In May 2024, Shettima was forced to abort his trip to the United States for the 2024 US-Africa Business Summit in Dallas, Texas, after the aircraft developed a technical fault mid-flight.

The incident occurred less than a month after President Tinubu was compelled to charter a private jet to Saudi Arabia when the same Gulfstream jet, originally assigned to the vice president, developed an oxygen leak in the Netherlands. Four months later, in October 2024, the vice president again cancelled his trip to the Commonwealth Heads of Government Summit in Samoa after a foreign object hit the aircraft during a stopover at JFK Airport in New York.

Presidency officials, who spoke on condition of anonymity to our correspondent, said the repeated technical failures may have prompted urgent maintenance, which in turn drove the escalating budget allocations.

Aside from the vice president’s aircraft, the FG also allocated funds for overhauling engines on two Falcon 7X jets (registered 5N-FGV and 5N-FGU), which received N1.66bn in 2024, N3.13bn in 2025, and N2.19bn in 2026, totalling N6.98bn over the three years. Additionally, a Gulfstream jet registered 5N-FGS received N1.68bn for engine overhaul in 2024, though no further allocations were made for it in subsequent years.

In total, engine overhaul projects across the Presidential Air Fleet consumed N4.58bn in 2024, N8.65bn in 2025, and N6.05bn in 2026, bringing the three-year aggregate to N19.27bn.

A close study of the allocation patterns revealed that engine maintenance costs peaked in 2025, a year after the Presidency took delivery of the N150bn Airbus A330, which the Spokesman to the President, Bayo Onanuga, argued would “save Nigeria huge maintenance and fuel costs, running into millions of dollars yearly.”

While engine overhaul spending for older aircraft declined by 30 per cent in 2026 compared to 2025, routine aircraft maintenance allocations under line item 22020407 increased by 10 per cent, from N4.12bn in 2025 to N4.54bn in 2026.

Aviation experts say aircraft age influences maintenance costs.

“These aircraft are not new. The older the aircraft, the higher the cost of maintenance and operation. So, the cost will increase over the years,” said General Secretary of the Aviation Round Table, Olumide Ohunayo. He argued that the Gulfstream G550, now 13 years old, requires increasingly frequent and expensive overhauls as critical components, such as engines, approach the end of their operational lifespan.

“The figure likely includes far more than the direct cost of repairing the aircraft,” Chief Executive Officer of Centurion Security Limited, John Ojikutu, stated.

“Engine overhauls are mandatory at specified intervals, regardless of whether the aircraft has been flown extensively or not,” explained an aircraft maintenance engineer who requested anonymity. “For a jet like the G550, a complete engine overhaul can cost anywhere from $1.5m to $3m per engine, depending on the condition and the extent of work required. If you see the cost increase, it could mean they’re replacing major components, not just doing standard checks. It could also show that they deferred previous maintenance and have to do catch-up work.”

The Presidential Air Fleet, managed by the Nigerian Air Force and headquartered at the Presidential Wing of Nnamdi Azikiwe International Airport, Abuja, currently operates 10 aircraft, including six fixed-wing jets and four helicopters.

Critics have long argued that Nigeria’s presidential fleet is among the largest in Africa and disproportionately expensive for a country grappling with severe fiscal constraints.

The Executive Chairman of the Centre for Anti-Corruption and Open Leadership, Debo Adeniran, argued that the administration’s spending habits were opposite to Nigerians’ expectations of frugality.

“What we are getting from this administration is the opposite of our expectations. We thought we would have an administration that would be frugal in spending and very meticulous in implementing its budget. But what we are getting is an administration that has fallen in love with profligacy, that doesn’t see anything wrong in living big in the midst of a poverty-stricken nation,” said Adeniran.

The House of Representatives Committee on National Security and Intelligence had in 2024 recommended the procurement of new aircraft for both the president and vice president, citing high maintenance costs and safety concerns with the ageing fleet. While the president received the Airbus A330, no similar replacement was announced for the vice president’s aircraft, which has received substantial maintenance allocations under Tinubu.

At the time of filing this report, the Presidency had not responded to inquiries about the specific nature of the engine work carried out on the aircraft.

The budget documents also indicate ongoing capital projects for PAF infrastructure, including N714.8m for the construction of a hangar for the Presidential Air Fleet in 2025, which fell to N500.36m in 2026.

The PAF’s total budget allocation declined from N17.32bn in 2025 to N14.70bn in 2026, mainly driven by decreased capital expenditure. (PUNCH)