Doc 58 - Race Scrutineering

2026 JAPANESE GRAND PRIX 27 - 29 March 2026 Technical Delegate’s Report Before the Race: The floor of car number 41 was digitally scanned and the scanned data were compared with the team declared CAD drawings. Further the team declared CAD drawings were also compared with previously submitted versions and checked for conformance with the 2026 Formula One Technical Regulations. An assymmetric and symmetric front wing deflection test was carried on car numbers 81, 05 and 10. A front wing flap deflection test was carried on car numbers 81, 05 and 10. A fuel sample was taken from car numbers 63, 44 and 31 and analysed during the race. An engine oil sample was taken from car numbers 63 and 44. On the grid it was checked that all cars had fitted their tyres and the tyre heating blankets were disconnected, when the “5-Minutes” signal was given. On the grid the temperature of the LHS and RHS front and rear tyre was checked on car numbers 81, 12, 63, 03, 23, 55, 14, 18, 05, 10 and 77. On the grid the minimum tyre starting pressure of the LHS and RHS front and rear tyre was checked on all cars. After the Race: The following cars were weighed: Number Car Driver 81 McLaren Mercedes Oscar Piastri From The FIA Formula One Technical Delegate To The Stewards Document 58 Date 29 March 2026 Time 19:06 01 McLaren Mercedes Lando Norris 63 Mercedes George Russell 12 Mercedes Kimi Antonelli 03 Red Bull Racing RB Ford Max Verstappen 06 Red Bull Racing RB Ford Isack Hadjar 16 Ferrari Charles Leclerc 44 Ferrari Lewis Hamilton 23 Atlassian Williams Mercedes Alexander Albon 55 Atlassian Williams Mercedes Carlos Sainz 41 Racing Bulls RB Ford Arvid Lindblad 30 Racing Bulls RB Ford Liam Lawson 14 Aston Martin Aramco Honda Fernando Alonso 31 Haas Ferrari Esteban Ocon 27 Audi Nico Hülkenberg 05 Audi Gabriel Bortoleto 10 Alpine Mercedes Pierre Gasly 43 Alpine Mercedes Franco Colapinto 11 Cadillac Ferrari Sergio Perez 77 Cadillac Ferrari Valtteri Bottas The following aerodynamic component or bodywork areas were checked on car numbers 16, 03 and 30: - Floor Body - Article C3.5.1 - Floor Foot - Article C3.5.2 - Floor Sidewall - Article C3.5.3 - Floor Board - Article C3.5.5 - Floor Winglet - Article C3.5.8 - Floor Corner - Article C3.5.10 - Nose - Article C3.7.1 - Forward Chassis - Article C3.7.2 - Mid Chassis - Article C3.7.3 - Roll Hoop - Article C3.7.4 - Mirror - Article C3.7.5 - Sidepod - Article C3.8.1 - Engine Cover - Article C3.8.2 - Tail - Article C3.9.1 - Front Wing Profiles - Article C3.10.1 - Front Wing Endplate body - Article C3.10.2 - Front Wing Outboard Footplate - Article C3.10.3 - Front Wing Inboard Footplate - Article C3.10.4 - Front Wing Endplate Diveplane - Article C3.10.5 - Front Wing Strake - Article C3.10.8 - Rear Wing Profiles - Article C3.11.1 - Rear Wing Endplate Body - Article C3.11.2 - Rear Wing Pylon - Article C3.11.4 - Rear Wing Aux. Components - Article C3.11.7 The plank and skid wear was checked on car numbers 81, 01, 63, 12, 03, 06, 16, 44, 23, 55, 41, 30, 14, 31, 27, 05, 10, 43, 11 and 77. A physical fuel mass check was carried out on car number 31. The fuel pressure of all cars during the race was checked. The logged pressure within the engine cooling system during the qualifying session was checked on all cars. The engine high rev limit bands were checked on all cars. Fuel flow meter calibration checksums were checked on all cars. The instantaneous fuel energy flow of all cars was checked. The partial load fuel energy flow of all cars was checked. The fuel temperature of all cars was checked. The plenum temperature was checked on all cars. The engine intake air pressure of all cars was checked. The maximum turbocharger speed was checked on all cars. The DC sensor code and calibration checksums were checked on all cars. The DC sensor temperatures were checked on all cars. The on-track ES state of charge was checked on all cars. The ERS recharge limits were checked on all cars. The maximum MGU-K power limits were checked on all cars. The maximum MGU-K speed was checked on all cars. The session type has been confirmed for all cars. Chassis FIA checksum was checked on all cars taking part in the race. The rear brakes pressure control was checked on all cars. The brake temperature warnings were checked on all cars. The steering wheel of all cars has been checked. The Race start data of all cars have been checked. Single clutch paddle use for the Race start has been checked on all cars. It was checked that no classified car exceeded 80 km/h when leaving the formation grid prior to the start of the Race. It was verified on all cars that the PCU dash display configuration was not changed during Parc Fermé. The maximum front wing adjuster system transition time was checked on all cars. The maximum rear wing adjuster system transition time was checked on all cars. The tyre starting pressures of all cars during the race were checked. The tyres cold pressure was checked on car numbers 81 and 27. The tyres used by all drivers during the race today have been checked. A fuel sample was taken from car number 03. The fuel samples have been checked for density and analysed by gas chromatography. The results of all the fuel analyses show that the fuels were the same as ones, which had been approved for use by the relevant competitors prior to the Competition. Further the density change of the fuel samples taken today was within the permitted limits. The engine oil samples have been analysed by FTIR spectroscopy and viscometry. The results of the FTIR analyses show that the sampled oils were consistent with reference engine oil samples which had been approved for use by the relevant competitors prior to the Competition. All car weights and the items checked were found to be in conformity with the 2026 FIA Formula One Technical Regulations. After the race car number 44 was randomly chosen among the top ten cars for more extensive physical inspections. Subject to these physical inspections was the fuel system of the car. In particular the compliance with Article C5.9, Article C6 as well as the submission according to FIA-F1-DOC-001-F was checked. All inspected components were found to be in conformance with the 2026 Formula One Technical Regulations. The FIA Formula One Technical Delegate Jo Bauer