Crash of a Lockheed L-1329 JetStar 731 in Southampton

Completing a flight from Istanbul to Southampton, the aircraft flew a procedural ILS and landed on runway 20. The crew report that they encountered wind shear on the final approach and they increased power to compensate for a loss of 10 knot of airspeed. The aircraft landed some 500 feet into the runway and, after touchdown, maximum braking appeared to be ineffective. The crew suspected aquaplaning and activated reversed thrust but they report that correct deployment was not indicated on the flight deck and so they assumed that it was not operating. Despite weaving along the remaining 1,500 feet of runway they were unable to prevent the aircraft from over running the end. The aircraft came to rest some 75 metres into the grass area beyond. Debris, consisting of earth and stones was ingested by the engines and the right wing tank was punctured. An inspection of the runway 10 minutes previously showed that, although the runway was wet, there was no standing water. A runway friction test was carried out at 1646 hrs and this gave the friction on the first, second and third runway segments as 0.67 Mu, 0.66 Mu and 0.57 Mu respectively.