N27SF

ATA 5753

RT INBOARD FLAP LOWER L/E HAS 7 LOOSE RIVETS. REMOVED AND REPLACED RIVITS IAW SRM 51-30-1.

ATA 5730

LT WING PANEL PN 5522800-51 CRACKED. REPLACED PANEL IAW MM 57-30-00

ATA 7200

INSP, A LOUD SCRAPING NOISE WAS HEARD WHEN FAN WAS TURNED. BORESCOPE OF TURBINE SEC., AFTER EXHAUST DUCT WAS REMOVED, NR 4 BRG HSG HEAT SHIELD WAS FOUND BROKEN, TWISTED, IN 3 SEPARATE PIECES, WAS RUBBING ON AFT FACE OF NR 3 LOW PRESSURE TURBINE DISC. DISC WAS GOUGED, HAD TO BE REPLACED ALONG WITH 10 BLADES. MINOR DAMAGE TO EXHAUST DUCT AT GAP BETWEEN DUCT, NR 3 LPT WHERE PIECES OF HEAT SHIELD HAD EXITED, A CRACK WAS NOTED ON 1 OF THE SUPPORT STRUTS. NR 4 BRG HAD PITTING ON ROLLERS, BUT COULD NOT BE CONFIRMED THAT IT WAS DUE TO LOSS OF HEAT SHIELD. ALL HEAT SHIELD MNTG HARDWARE WAS INTACT AND TIGHT. PART TT AND/OR UNRECOGNISED FATIGUE CRACK WERE CONTRIBUTING FACTORS TO THIS FAILURE.

ATA 5520

DURING A PHASE 5 INSPECTION A SMALL CRACK WAS DISCOVERED NEAR THE LT UPPER NUTPLATE ON THE ELEVATOR BOBWEIGHT SUPPORT ARM. AFTER REMOVING THE ASSEMBLY IT WAS DISCOVERED THAT THERE WERE MULTIPLE CRACKS AROUND ALL FOUR NUTPLATES. REPLACED BOTH SUPPORT ARMS. SUSPECT METAL FATIGUE AS CAUSE OF THE CRACKING. SUGGEST THAT THIS ASSEMBLY BE REMOVED AT EACH PHASE 5 INSPECTION TO INSPECT FOR CRACKING.

ATA 3610

AT CRUISE, PILOT NOTED ITT ON LEFT ENGINE FLUCTUATING AND THEN DROPPING TO ZERO. ALL OTHER ENGINE INSTRUMENTS READ NORMAL. AIRCRAFT LANDED WITHOUT INCIDENT. INITIAL INVESTIGATION SHOWED PROBLEM TO BE ISOLATED TO THE LEFT ENGINE ITT HARNESS. AIRCRAFT WAS FERRIED TO A P & W ENGINE REPAIR FACILITY WHERE IT WAS DISCOVERED THE AFT INNER BYPASS DUCT WAS CRACKED AND BROKEN AND HAD RUBBED THROUGH THE ITT HARNESS. HARNESS WAS REPLACED, DUCT WAS REPAIRED, AND RE-INSTALLED. SUBMITTER SUGGESTS THE OUTER BYPASS DUCT BE REMOVED AT PERIODIC ENGINE INSPECTIONS TO INSPECT THIS AREA FOR POSSIBLE CRACKS.