POSSIBLE JET BLAST DAMAGE DURING TAXI-IN TO PARKING.

Narrative

WE ENTERED THE CITY CARGO RAMP; TAXIING ON YELLOW CTRLINE. THE RAMP AREA WAS HEAVILY CONGESTED WITH ACFT; TRUCKS AND GND EQUIP. THE MARSHALLER; STANDING AT THE END OF THE TAXI LINE; GUIDED US TO THE BACK OF THE RAMP. THE AMOUNT OF RAMP CLUTTER NECESSITATED SLOWING SIGNIFICANTLY. BOTH PLTS WERE MAINTAINING OUTSIDE VIGILANCE DUE TO THE AMOUNT OF GND EQUIP ON THE RAMP. AS WE TAXIED IN; IT WAS NOT KNOWN WHAT OUR ULTIMATE PARKING POS WOULD BE; BUT IN THE PAST WE TAXIED IN AND MADE A L 90 DEG TURN AND SHUT DOWN. TODAY; HOWEVER; THIS WAS NOT THE CASE. AT 90 DEGS; THE MARSHALLER KEPT SIGNALLING TO CONTINUE THE TURN; AND IT BECAME CLR THAT WE WOULD BE TURNING A FULL 180 DEG. BECAUSE WE HAD SLOWED COMING INBOUND; AND BECAUSE OF THE SHARPNESS OF THE TURN; THE TURN COULD NOT BE COMPLETED. WITHOUT ADDING THRUST ON THE #1 AND #2 ENGS (#3 WAS SHUT DOWN DURING TAXI IN PER AOM). THE TURN WAS COMPLETED. THE ACFT PARKED AND WE WERE INFORMED BY FAA THAT OUR JET BLAST 'KNOCKED DOWN SOME CONES' ON A PARKING RAMP. ANOTHER INDIVIDUAL TOLD US OUR JET BLAST DAMAGED THE RUDDER ON AN F-27. SUPPLEMENTAL INFO FROM ACN 281468: SHORTLY AFTER PARKING AN FAA AIRWORTHINESS INSPECTOR BOARDED THE ACFT; STATING THAT THIS WAS ONLY A 'COURTESY CALL.' HE INFORMED US THAT OUR JET BLAST HAD KNOCKED OVER SOME CONES ON THE RAMP; BUT MADE NO INDICATION THAT THERE HAD BEEN ANY OTHER POSSIBLE DAMAGE. AFTER HE LEFT ANOTHER GENTLEMEN BOARDED THE ACFT. HE WAS IN SOME WAY CONNECTED WITH THE F-27 PARKED ON THE RAMP AND TOLD US THAT OUR JET BLAST KNOCKED OFF HIS 'COVER;' 'GUST LOCK' AND WRINKLED HIS RUDDER; BUT HE ALSO INDICATED THAT THIS WAS 'NO BIG DEAL.' HE LEFT.