N911EB

Part: FIRE DETECTOR — CORRODED (NR 1 NACELLE)

NR 1 ENG FIRE DETECTOR WARNING LIGHT ILLUMINATED DURING CRUISE FLIGHT. AC DIVERTED FROM FLIGHT PATH AND LANDED ON THE SHOULDER OF THE ROAD. IT WAS DETERMINED THAT THERE WAS NOT A FIRE. MAINT WAS DISPATCHED TO THE LZ. IT WAS DETERMINED THAT CORROSION WAS EVIDENT BETWEEN THE WIRE TERMINAL AND THE FIRE DETECTOR. THE TERMINAL AND THE FIRE DETECTOR WERE CLEANED, AND AN OPERATIONAL CHECK OF THE FIRE DETECTION SYS WAS SATISFACTORY. (K)

Part: SHIELD — SEPARATED (NOZZLE) · airframe 5,721 hrs

THE NR 1 NOZZLE SHIELD DOME SEPARATED CAUSING THE TURBINE NR 8 BEARING SCAVENGE STRUT TO CLOG WITH CARBON INDUCED BY THE EXCESS HEAT ALLOWED IN THE AREA BY THE MISSING DOME. WHEN THE SCAVENGE FLOW WAS COMPLETELY LOST, THE OIL WAS FORCED THROUGH THE NR 8 LABYRINTH SEAL CAUSING SMOKING AND AN EXTREMELY HIGH RATE OF OIL CONSUMPTION. INSPECTION OF THE NOZZLE SHIELD BRAZE JOINT REVEALS, WHAT APPEARS TO BE, A LACK OF 100 PERCENT BRAZE COVERAGE IN THE JOINT. PART WAS SENT TO EXTEX FOR INVESTIGATION. NOTE THAT THIS APPEARS TO HAVE BEEN CAUSED BY A LACK OF BRAZE MATERIAL AND DIFFERS FROM THE BRAZE CRACKING PROBLEM THAT IS COVERED BY CEB 1370.

Part: WARNING BOX — MALFUNCTIONED (RPM WARNING)

RPM WARNING BOX MALFUNCTION CAUSES RPM LIGHT TO CONTINUOUSLY BLINK.

Part: NOZZLE SHIELD — CRACKED (NR 1 TURBINE)

ENGINE REMOVED DUE TO SMOKE ON SHUTDOWN. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON NR 1 NOZZLE SHIELD DOME AS MARKED.

Part: CONTROL UNIT — MALFUNCTIONED (COCKPIT)

CONTROL UNIT TRANSMITS CONSTANTLY. PERFORMED PRELIMINARY INSPECTION AND FOUND THUMBWHEEL INTERMITTENT.

Part: INDICATOR — ERRATIC (FUEL LEVEL)

FUEL LEVEL GAUGE, ERRATIC INDICATION READINGS.

Part: TRANSPONDER — MALFUNCTIONED (COCKPIT)

REPLY LIGHT BLINKS CONTINUOUSLY.

Part: DRIVE SHAFT — WORN (TAIL ROTOR)

TAIL ROTOR WORN BEYOND LIMITS.

Part: INDICATOR — MALFUNCTIONED (COCKPIT)

COURSE POINTER ON INDICATOR IS INOPERATIVE.

Part: INDICATOR — READS HIGH (COCKPIT EGT/TIT)

EGT/TIT INDICATOR READS HIGH AND FLUCTUATES AT 900 DEGREES WHEN VIBRATING.

Part: INDICATOR — FAULTY (OIL PRESSURE SYS)

OIL PRESSURE NR 2 NEEDLE PEGS OUT WHEN POWER APPLIED.

Part: TURBINE WHEEL — PITTED (2ND STAGE)

RECEIVING INSPECTION REVEALED: PITS BEYOND SERVICEABLE LIMITS ON NR2 WHEEL BLENDED AREA E (AFT) AS MARKED. NOTE: BLENDING OF THESE PITS WOULD EXCEED OVERHAUL LIMITS OF .050 DEEP. INSTALLED A NEW NR2 WHEEL.

Part: TRANSDUCER — FAILED (FUEL SYS)

TRANSDUCER HIGH OUT OF TOLERANCE THROUGHOUT.

Part: INDICATOR — FAILED (NR 2 ENG OIL)

NR2 ENGINE OIL PRESSURE HIGH AT 100%.

Part: INDICATOR — STICKING (SINGLE RPM)

SINGLE RPM INDICATOR STICKING.

Part: TRANSDUCER — FAILED (FUEL PRESS)

TRANSDUCER READS HIGH OUT OF TOLERANCE AT 95 PSI.

Part: UPPER HOUSING — WORN (TRANSMISSION)

UPPER HOUSING BUSHING BORE WORN IN AREA 3.

Part: CENTER CASE — WORN (M/R XMSN)

CENTER CASE LINER LOOSE AND T/R BORE WORN.

Part: BUSHING — SEPARATED (ENGINE MT)

INNER BUSHING SEPARATED FROM RUBBER. REPLACED WITH SERVICEABLE PART.

Part: INDICATOR — ERROR (EXH TEMP)

EXH TEMP INDICATOR EXCESSIVE FRICTION ERROR.

Part: FLUX VALVE — MALFUNCTION (COCKPIT HSI)

FLUX VALVE CAUSES HSI TO SEARCH. FLUX VALVE IS 15 FEET OFF.

Part: INDICATOR — STICKS (ENG RPM)

RPM INDICATOR STICKS UP TO 30%.

Part: BLADE — CRACKED (M/R)

BLADE IS CRACKED. NOSE AND NECK SHELL CRACKED. ALL LEADING EDGE ABRASION STRIPS SEPARATED EXCEPT #1 CENTER.

Part: TRANSDUCER — FAILED (FUEL SYS)

TRANSDUCER READS HIGH OUT OF TOLERANCE.

Part: SHIELD — CRACKED (NR 1 NOZZLE)

ENGINE REMOVED DUE TO TURBINE #1 AND #2 WHEEL CYCLES. UPON INSPECTION OF TURBINE PARTS NOTED: CRACKED BEYOND SERVICEABLE LIMITS ON #1 NOZZLE SHIELD ABOUT 75 PERCENT AROUND DOME AND EXTENDING INTO THE CENTER OF DOME UNDER DEFLECTOR. CEB-A-1341 WASCOMPLIED WITH 1-30-96, #1 NOZZLE SHIELD T.S.O. 1598:35, NO UNUSUAL CONDITIONS NOTED. UPON REMOVAL OF #1 NOZZLE SHIELD T.S.O. 2124:20, COMPLIED WITH CEB-A-1342 REV. 1 .310 STAINLESS STEEL TEST POSITIVE. RETURNED PART TO ALLISON ENGINE CO. PER CEB-A-1342, REV. 1 INSTRUCTION ON AFA#31052A.

Part: WHEEL — BLADE DEFECTS (1ST STAGE)

TURBINE REMOVED DUE TO CYCLED OUT #1 AND #2 WHEELS. UPON INSPECTION OF TURBINE PARTS NOTED: MINOR SULFIDATION ON ALL BLADES ON #1 WHEEL. SCRAPPED PART.

Part: GYRO — DEFECTIVE (COCKPIT DG)

DIR GYRO VERY SLOW TO SPOOL UP HSI. CAUSES HSI TO GO OFF LINE.

Part: TRANSPONDER — DEFECTIVE (COCKPIT ATC)

INTERMITTENT OPERATION IN FLIGHT. PERFORMED PRELIMINARY INSPECTION. TROUBLESHOT AND REPLACED SWITCH BOARD ASSY P/N 200-0381-01. REPAIRED. BENCH CHECK GOOD.

Part: CONTROL UNIT — DEFECTIVE (COCKPIT)

TRANSCEIVER RECEIVES SCRATCHY ON CHANNEL 5.

Part: CONTROL UNIT — DEFECTIVE (COCKPIT)

TRANSMITS BUT WILL NOT RECEIVE. VERIFIED UNIT DOES NOT RECEIVE. REPLACED ON/OFF SWITCH. REPAIRED. BENCH CHECK GOOD.

Part: INDICATOR — STICKS (TRIPLE TACH)

ROTOR NEEDLE INTERMITTENTLY STICKS.

Part: ANTENNA — WONT TEST (RADAR ALTIMETER)

ANTENNA WILL NOT TEST.

Part: CONTROL UNIT — FAILED (COCKPIT)

DISPLAY WILL NOT COME ON. REPLACED FUSE F1 AND DIODE CR5. REPAIRED. DISPLAY DOES NOT DIM. REPLACED PHOTOCELL RT1. REPAIRED. REPLACED INTERMITTENT THUMBWHEEL ASSY. BENCH CHECK GOOD.

Part: INDICATOR — DEFECTIVE (COCKPIT)

WILL NOT TEST. REPLACED CRACKED LENS AND RUBBER GASKET. ALIGNED AND CALIBRATED TO SPECS. BENCH CHECK GOOD.

Part: INDICATOR — DEFECTIVE (TRIPLE TACH)

#1 AND #2 NEEDLES HAVE A 10% TORQUE SPLIT.