Narrative:

After the main gear left the ground during departure; the first officer and I notice a slight vibration for a very brief period. There were no abnormal indications present. We continued to our destination (ZZZ) under normal operations. Prior to landing at ZZZ; we extended the gear and received normal indications (3 green and no gear unsafe light). After the main gear touched the ground; noticed another vibration; which again quickly subsided. We applied light braking and continued to taxi to the gate with no abnormalities of note. After reaching the gate we shut down; performed our normal parking procedures and checks during which the hydraulic pump turned on and off intermittently while the hydraulic fluid quantity was decreasing incrementally each time the pump turned on. I immediately turned off the pump. After completing the parking check; the first officer and I went to perform a walkaround during which we discovered a large puddle of hydraulic fluid on the ground around the left main gear. Also the tread from the outboard tire of the left main gear had separated and wrapped around the left main gear assembly. The outboard spring on the left main was also missing. First officer informed tower to check the runway for possible FOD. After the passenger deplaned; we contacted dispatch and maintenance control. First officer happened to have a digital camera and was able to take pictures which he then e-mailed to maintenance for review. I entered the discrepancy in the maintenance log. The following day; we were getting ready to depart on another plane when another pilot and first officer noticed during daylight damage to the left propeller on 3 of the 4 blades. I again contacted dispatch and maintenance control and informed them of this discovery and that I had entered it into the maintenance log. Flight crew cause/narrative: as far as the landing gear; the tire tread separation seemed to be the main culprit when it comes to damage to the hydraulic lines and missing spring. I do not know how the damage to the left propeller occurred. We did not note any damage prior to departure or during flight; nor did we have propeller contact -- strike of any kind.

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Original NASA ASRS Text

Title: A SAAB 340 CREW DISCOVERED PROP; HYDRAULIC LINE; LEFT MAIN LNDG GEAR STRUT DAMAGE AFTER LNDG. A TIRE FAILED ON THE PREVIOUS TKOF.

Narrative: AFTER THE MAIN GEAR LEFT THE GND DURING DEP; THE FO AND I NOTICE A SLIGHT VIBRATION FOR A VERY BRIEF PERIOD. THERE WERE NO ABNORMAL INDICATIONS PRESENT. WE CONTINUED TO OUR DEST (ZZZ) UNDER NORMAL OPS. PRIOR TO LNDG AT ZZZ; WE EXTENDED THE GEAR AND RECEIVED NORMAL INDICATIONS (3 GREEN AND NO GEAR UNSAFE LIGHT). AFTER THE MAIN GEAR TOUCHED THE GND; NOTICED ANOTHER VIBRATION; WHICH AGAIN QUICKLY SUBSIDED. WE APPLIED LIGHT BRAKING AND CONTINUED TO TAXI TO THE GATE WITH NO ABNORMALITIES OF NOTE. AFTER REACHING THE GATE WE SHUT DOWN; PERFORMED OUR NORMAL PARKING PROCS AND CHKS DURING WHICH THE HYD PUMP TURNED ON AND OFF INTERMITTENTLY WHILE THE HYD FLUID QUANTITY WAS DECREASING INCREMENTALLY EACH TIME THE PUMP TURNED ON. I IMMEDIATELY TURNED OFF THE PUMP. AFTER COMPLETING THE PARKING CHK; THE FO AND I WENT TO PERFORM A WALKAROUND DURING WHICH WE DISCOVERED A LARGE PUDDLE OF HYD FLUID ON THE GND AROUND THE L MAIN GEAR. ALSO THE TREAD FROM THE OUTBOARD TIRE OF THE L MAIN GEAR HAD SEPARATED AND WRAPPED AROUND THE L MAIN GEAR ASSEMBLY. THE OUTBOARD SPRING ON THE L MAIN WAS ALSO MISSING. FO INFORMED TWR TO CHK THE RWY FOR POSSIBLE FOD. AFTER THE PAX DEPLANED; WE CONTACTED DISPATCH AND MAINT CTL. FO HAPPENED TO HAVE A DIGITAL CAMERA AND WAS ABLE TO TAKE PICTURES WHICH HE THEN E-MAILED TO MAINT FOR REVIEW. I ENTERED THE DISCREPANCY IN THE MAINT LOG. THE FOLLOWING DAY; WE WERE GETTING READY TO DEPART ON ANOTHER PLANE WHEN ANOTHER PLT AND FO NOTICED DURING DAYLIGHT DAMAGE TO THE L PROP ON 3 OF THE 4 BLADES. I AGAIN CONTACTED DISPATCH AND MAINT CTL AND INFORMED THEM OF THIS DISCOVERY AND THAT I HAD ENTERED IT INTO THE MAINT LOG. FLT CREW CAUSE/NARRATIVE: AS FAR AS THE LNDG GEAR; THE TIRE TREAD SEPARATION SEEMED TO BE THE MAIN CULPRIT WHEN IT COMES TO DAMAGE TO THE HYD LINES AND MISSING SPRING. I DO NOT KNOW HOW THE DAMAGE TO THE L PROP OCCURRED. WE DID NOT NOTE ANY DAMAGE PRIOR TO DEP OR DURING FLT; NOR DID WE HAVE PROP CONTACT -- STRIKE OF ANY KIND.

Data retrieved from NASA's ASRS site as of May 2009 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.