The aircraft overran the end of runway 21L after landing. The
runway was wet from very heavy rain. The crew had flown the
approach with flaps 25 selected, and had intended to select idle
reverse thrust after touchdown.
The aircraft encountered very heavy rain on late final approach
and deviated above the glideslope. Just before touchdown, the
captain instructed the first officer (the flying pilot) to go
around. As thrust was being increased, the mainwheels contacted the
runway. The captain then retarded the thrust levers and the crew
commenced manual braking about 7 seconds later. Reverse thrust was
not selected.
Touchdown occurred about 1,000 m along the runway and the
aircraft entered the overrun at 88 kts. Partial dynamic
hydroplaning had occurred during the landing roll. This, along with
the absence of reverse thrust, reducing the stopping forces
available to slow the aircraft.
The aircraft nose landing gear and one main landing gear
separated during the overrun sequence.
The captain ordered a precautionary disembarkation of the
aircraft about 20 minutes after it came to rest.
