Narrative:

Event: while exiting the runway turning onto the taxiway the aircraft slid off the pavement approximately 30 ft into the grass and mud. Situation: the first officer flew a stabilized ILS approach to runway 16L in smf. We landed about 1500 ft down the runway on speed and on centerline. Because of the bad WX and runway conditions, I decided to be conservative and roll out the landing all the way to the end of the runway rather than take the highspd turnoff. Upon slowing to taxi speed, I came on the brakes with the first officer and took control of the airplane. I pushed the power up slightly to keep us rolling down the runway. Upon reaching the end of the runway I slowed the airplane to turn off on taxiway D11. While in the turn, the aircraft began to slide. The aircraft slid off the taxiway and into the grass and mud. The airplane stopped approximately 30 ft off the taxiway. There were no injuries. I believe the cause was bad WX yielding a very slippery taxiway. Corrective action: the biggest corrective action is to advise all pilots to be ultra conservative (which I was doing by going all the way to the end of the runway). When the runway/taxiway is wet, hydroplaning is much easier than one thinks. Since the incident, I have learned that other aircraft have slid/hydroplaned at the same spot. I believe a comment on the release or the form would be beneficial to enhance safety. Since the incident, I have also learned the first officer said he was 'a little uncomfortable' with our taxi speed. However, he never spoke up to relay his feelings. This fact needs to be emphasized in initial training so new first officer's can be a better part of the cockpit team. They need to voice their opinions if they see something they don't like even if they are new!

Related reports:

Google
 

Original NASA ASRS Text

Title: A B733 CREW, LNDG ON A WET RWY AT SMF, WERE UNABLE TO NEGOTIATE THE EXIT, SLIDING OFF THE TXWY.

Narrative: EVENT: WHILE EXITING THE RWY TURNING ONTO THE TXWY THE ACFT SLID OFF THE PAVEMENT APPROX 30 FT INTO THE GRASS AND MUD. SIT: THE FO FLEW A STABILIZED ILS APCH TO RWY 16L IN SMF. WE LANDED ABOUT 1500 FT DOWN THE RWY ON SPD AND ON CTRLINE. BECAUSE OF THE BAD WX AND RWY CONDITIONS, I DECIDED TO BE CONSERVATIVE AND ROLL OUT THE LNDG ALL THE WAY TO THE END OF THE RWY RATHER THAN TAKE THE HIGHSPD TURNOFF. UPON SLOWING TO TAXI SPD, I CAME ON THE BRAKES WITH THE FO AND TOOK CTL OF THE AIRPLANE. I PUSHED THE PWR UP SLIGHTLY TO KEEP US ROLLING DOWN THE RWY. UPON REACHING THE END OF THE RWY I SLOWED THE AIRPLANE TO TURN OFF ON TXWY D11. WHILE IN THE TURN, THE ACFT BEGAN TO SLIDE. THE ACFT SLID OFF THE TXWY AND INTO THE GRASS AND MUD. THE AIRPLANE STOPPED APPROX 30 FT OFF THE TXWY. THERE WERE NO INJURIES. I BELIEVE THE CAUSE WAS BAD WX YIELDING A VERY SLIPPERY TXWY. CORRECTIVE ACTION: THE BIGGEST CORRECTIVE ACTION IS TO ADVISE ALL PLTS TO BE ULTRA CONSERVATIVE (WHICH I WAS DOING BY GOING ALL THE WAY TO THE END OF THE RWY). WHEN THE RWY/TXWY IS WET, HYDROPLANING IS MUCH EASIER THAN ONE THINKS. SINCE THE INCIDENT, I HAVE LEARNED THAT OTHER ACFT HAVE SLID/HYDROPLANED AT THE SAME SPOT. I BELIEVE A COMMENT ON THE RELEASE OR THE FORM WOULD BE BENEFICIAL TO ENHANCE SAFETY. SINCE THE INCIDENT, I HAVE ALSO LEARNED THE FO SAID HE WAS 'A LITTLE UNCOMFORTABLE' WITH OUR TAXI SPD. HOWEVER, HE NEVER SPOKE UP TO RELAY HIS FEELINGS. THIS FACT NEEDS TO BE EMPHASIZED IN INITIAL TRAINING SO NEW FO'S CAN BE A BETTER PART OF THE COCKPIT TEAM. THEY NEED TO VOICE THEIR OPINIONS IF THEY SEE SOMETHING THEY DON'T LIKE EVEN IF THEY ARE NEW!

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.