On 14 August 2005, a British Regional Airlines Embraer 145 overran Runway 27L at Hannover by 160 metes after flying a stable approach in daylight but then making a soft and late touchdown on a water covered runway. Dynamic aquaplaning began and this was followed by reverted rubber aquaplaning towards the end of the paved surface when the emergency brake was applied. The aircraft suffered only minor damage and only one of the 49 occupants was slightly injured.
Description
On 14 August 2005, an Embraer 145 being operated by British Airways Regional on a scheduled passenger flight from Birmingham to Hannover overran the wet landing runway by 160 m in normal visibility after flying a daylight ILS approach with the approach lights visible from about 4 nm. There was no fire and only one of the 49 occupants received minor injuries. The aircraft suffered only minor damage.
Investigation
An Investigation was carried out by the German Federal Bureau of Aircraft Accidents Investigation, the Bundesstelle für Flugunfalluntersuchung (Germany) (BFU). This found that the aircraft commander had been PF and that when offered either Runway 27L or the longer 27R for landing, he had been influenced in his choice by the more convenient taxi route to the usual parking gate after landing from 27L. The aircraft was operating at close to MLW and it was noted that thrust reversers were not fitted.
The Investigation found that the ILS approach had been stable at 500 feet aal and that the autopilot had been disconnected at 180 ft aal, after which the aircraft had remained above the ILS GS. The landing runway threshold was over-flown at a height 62 ft at a speed of 140 KIAS compared to the target height of 50 feet and an applicable Reference Speed (Vref) of 138 KIAS. The subsequent touchdown occurred at 122 KIAS and was estimated to have taken place about 850 metres after the runway threshold. Automatic ground spoiler deployment occurred but there was no significant deceleration as a result of brake application.
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