N99330

Part: CYLINDER — CRACKED (NR 16) · airframe 32,257 hrs

NR 4 ENGINE SHUT DOWN DUE TO BACKFIRING. REPLACED NR 16 CYLINDER DUE TO CRACKED HEAD, REF: NAC DC-6 MM TASK CARD V PG 16 AND 16A. GROUND RUN CHECK GOOD, NO LEAKS NOTED.

Part: CYLINDER — FAILED (ENGINE) · airframe 32,197 hrs

NR 1 ENGINE SHUTDOWN DUE TO DOUBLE SHORTED SECONDARY ON NR 1 CYLINDER.REPLACED NR 1 CYLINDER DUE TO RINGLAND FAILURE.

Part: CYLINDER HEAD — SEPARATED (NR 4 ENGINE) · airframe 32,027 hrs

NR 4 ENGINE SHUTDOWN DUE TO BACK FIRING. REPLACED NR 2 CYLINDER DUE TO A BLOWN HEAD. REF: NAC DC-6MM SEC. V. PG.16-16A.

Part: STRINGER — CRACKED (LT WING) · airframe 31,952 hrs

LT WING STRINGER CRACKED AT STA. 194. REPAIRED LT WING LOWER STRINGER 22 SPLICE, WING STA. 194. REF; NAC DRAWING: NAC2006-06 REV: 1R DATED 7 JULY 2006.

Part: SKIN — CRACKED (LT WING) · airframe 31,952 hrs

LT HAND WING LOWER SKIN STA. 210, STR. 22 WING SKIN CRACKED AFT OF CENTER SPAR. REPAIRED LT WING LOWER SKIN STA. 213, STR. 22 REF: NAC DRAWING: NAC2006-05 REV: 1R DATED 12 JULY 2006.

Part: UNKNOWN — OUT OF ADJUST (MIXTURE CONTROL) · airframe 31,909 hrs

NR 1, 2, 3, & 4 ENGINES FUEL FLOW 500 PPH, NO DERICHMENT OR ENRICHMENT. DETERMINED MIXTURE NOT ENGAGED TO FULL RICH POSITION FOR TAKEOFF. A 30" GROUND RUN CHECKED GOOD PER NAC DC-6MM SECT IV PG EC01.1 & EC01.2.

Part: CYLINDER — CRACKED (NR 2 ENGINE) · airframe 31,909 hrs

NR 2 ENGINE FEATHERED DUE TO BACKFIRING. SUSPECT NR 4 CYLINDER. REPLACED NR 4 CYLINDER PER NAC DC-6MM SEC V PG 16-16A. OPERATIONAL CHECK AND LEAK CHECK GOOD.

Part: VALVE SEAT — FAILED (NR 3 ENGINE) · airframe 31,827 hrs

NR 3 ENGINE SHUT DOWN AT CRUISE FLIGHT DUE TO BACKFIRE. REPLACED NR 11 CYLINDER DUE TO EXHAUST VALVE SEAT FAILURE. PER REF: NAC DC-6MM SEC V PG 16 & 16A.

Part: FLOOR SUPPORT — CORRODED (BS 282-306) · airframe 31,708 hrs

RIGHT CENTER FLOORBEAM BOTTOM CORRODED AT STATION 282-298. REMOVED DAMAGE AND INSTALLED REPAIR PER DER DRAWING NAC2006-01, IR & FAA 8110-3, DATED 2 FEBRUARY 2006. REPAIRED FLOOR SUPPORT BETWEEN STA 282-306. MANUFACTURED AND INSTALLED ANGLE PER ITEM 12 WITH 7075-T6511 CLAD ALUMINUM, AND STRAP PER ITEM 14 WITH 7075-T6 CLAD ALUMINUM.

Part: SPARK PLUG — CRACKED (NR 13 CYLINDER) · airframe 31,704 hrs

NR 4 ENGINE SHUTDOWN DUE TO NR 13 CYLINDER DOUBLE SHORTED SECONDARY. FOUND FRONT PLUG FOULED AND REAR PLUG WITH CRACKED CERAMIC. REPLACED WITH SERVICEABLE PLUGS, REF: NAC MM SEC. IV PG. ECO5.1. OP CHECKED GOOD.

Part: SPARK PLUG — FOULED (ENGINE) · airframe 31,664 hrs

NR 3 ENGINE SHUT DOWN DUE TO BACKFIRE AND DOUBLE SHORTED SECONDARY ON NR 15 CYLINDER. REMOVED NR 15 CYLINDER FRONT AND REAR SPARK PLUGS. NO VISUAL DEFECTS NOTED. TESTED PLUGS AND FOUND WOULD NOT FIRE. INSTALLED SERVICEABLE PLUGS. PERFORMED ENGINE OPS CHECK, CHECKED GOOD. REF NAC DC-6MM SEC IV ECO5.1 & ECO1.2.

Part: CYLINDER — CRACKED (NR 2) · airframe 31,638 hrs

NR 2 ENGINE SHUT DOWN ON CLIMB OUT DUE TO DOUBLE SHORTED SECONDARY NR 2 CYLINDER. FOUND NR 2 CYLINDER CRACKED. REPLACED NR 2 CYLINDER. LEAK AND OP CHECKED GOOD IAW NAC DC-6MM SECTION V PG 16 & 16A.

Part: CYLINDER — FAILED (NR 2 ENGINE) · airframe 30,682 hrs

NR 2 ENGINE SHUTDOWN DUE TO RUNNING ROUGH AND WOULDN'T STAY RUNNING. NR 18 CYLINDER FAILURE. REPLACED NR 18 CYLINDER. OPS CHECKED GOOD.

Part: STRINGER — CRACKED (RT WING)

X-RAY REVEALED CRACK, STR 19, STA 182. REPAIRED LOWER RIGHT WING STRINGER NR 19, STA 181 RT PER DWG NAC2005-01.

Part: STRINGER — CRACKED (RT WING)

STRINGER 19 CAP CRACKED AT STA 196 AND 233. REPAIRED RIGHT WING LOWER STR 19 AND 21 CAP SPLICE WING STA 222 PER DWG NAC 2005-02 DATED 24 MAY 2005.

Part: CYLINDER — CRACKED (NR 18) · airframe 30,949 hrs

NR 4 ENGINE SHUT DOWN, WOULD NOT TAKE A LEAN. NR 4 ENGINE NR 18 CYLINDER REPLACED. OP AND LEAK CHECKED GOOD.

Part: LANDING GEAR — MALFUNCTIONED (LT AND RT) · airframe 30,906 hrs

NOSE GEAR WOULD NOT RETRACT. ISOLATED RT AND LT MAIN GEAR, PERFORMED NOSE GEAR SWING. OPS CHECKED GOOD PER MI REPORT: (CHECKED UP LOCK SWITCH ACTIVATION, NO DEFECTS FOUND. HEATED SWITCH AND PERFORMED GEAR SWING. CHECKED GOOD FIRST TIME, OPERATED 4 CONSECUTIVE TIMES WITH NO DISCREPANCIES.

Part: CYLINDER — CRACKED (NR 9) · airframe 30,682 hrs

NR 2 ENGINE SHUT DOWN DUE TO NR 9 CYLINDER DOUBLE SHORTED SECONDARY. INSPECTION OF NR 9 CYLINDER SHOWED CRACKED CYLINDER AND PLUGS OIL FOULED. PROP WOULD NOT TURN AND SCAVENGE SCREENS SHOWED EVIDENCE OF METAL. REPLACED NR 2 ENGINE.

Part: CYLINDER — FAILED (NR 12) · airframe 30,666 hrs

ABORTED TAKEOFF DUE TO NR 2 ENGINE NR 12 CYLINDER DOUBLE SHORTED SECONDARY AND BACKFIRING. REPLACED NR 2 ENGINE NR 12 CYLINDER. OP CHECKED GOOD.

Part: ACTUATOR — INOPERATIVE (OILCOOLER DOOR) · airframe 30,637 hrs

NR 1 ENGINE SHUT DOWN DUE TO HIGH AND UNCONTROLABLE OIL TEMPERATURE. REPLACED NR 1 ENGINE OIL COOLER DOOR ACTUATOR. OP CHECKED GOOD.

Part: CYLINDER — CRACKED (NR 4) · airframe 30,444 hrs

NR 4 ENGINE SHUT DOWN DUE TO OIL LOSS. NR 4 CYLINDER CRACKED. REPLACED NR 4 CYLINDER. OP AND LEAK CHECKED GOOD.

Part: SKIN — DAMAGED (FUSELAGE) · airframe 30,367 hrs

HOLE IN FUSELAGE AFT OF THE REAR CARGO DOOR AT STA 807.5L TO 822L. REMOVED DAMAGE AND FABRICATED A NEW PATCH FROM 0.80 7075-T6. REF: DOHM FIGURE 12-22.

Part: FRAME — CRACKED (FUSELAGE) · airframe 30,251 hrs

RT FUSELAGE CIRCUMFERENTIAL AT STA. R460 CRACKED APPROXIMATELY 3 INCHES ABOVE FLOOR LEVEL. REPLACED ANGLE WITH THE SAME TYPE AND MATERIAL .090 7075 T6. FABRICATED AND INSTALLED REPAIR (L) AND STRAP WITH REFERENCE TO DOHM FIG. 11-52 AND FIG. 12-10 SHEET 2.

Part: STUD — BROKEN (XMTER BRACKET) · airframe 30,235 hrs

NR 1 ENGINE FEATHERED DUE TO OIL LOSS. FOUND BROKEN STUD AT FUEL FLOW TRANSMITTER BRACKET. REPLACED STUD, LEAK CHECKED GOOD.

Part: CYLINDER — DEFECTIVE (NR 2 ENGINE) · airframe 30,170 hrs

DISCREPANCY: NR 2 ENGINE SHUT DOWN DUE TO RUNNING ROUGH AND BACK FIRING AT CRUISE. NR 1 CYLINDER LT SIDE SHORTED SECONDARY. REPLACED NR 1 CYLINDER DUE TO FAILED RINGLAND.

Part: VALVE — MISSING (NR 1 ENGINE) · airframe 30,119 hrs

NR 1 ENGINE SHUTDOWN DUE TO NR 12 CYLINDER LOW COMPRESSION. INSPECTED CYLINDER AND FOUND VALVE MISSING. REPLACED NR 1 ENGINE.

Part: ENGINE — LEAKING (NR 2) · airframe 29,841 hrs

NR 2 ENGINE SHUT DOWN DUE TO RUNNING ROUGH AND DOUBLE SHORTED SECONDARIES ON MOST CYLINDERS. REPLACED NR 2 ENGINE DUE TO BLOWER SEAL LEAKING.

Part: CYLINDER — MAKING METAL (NR 6) · airframe 29,581 hrs

NR 4 ENGINE SHUT DOWN DUE TO BACK FIRING, NR 6 CYLINDER LT AND RT LOW RESISTANCE SECONDARY. REPLACED NR 4 ENGINE DUE TO MAKING METAL.

Part: SEAL — WORN (NR 3 ENGINE) · airframe 29,467 hrs

NR 3 ENGINE SHUT DOWN DUE TO LOW OIL PRESSURE. FOUND OIL FILLER CAP LEAKING AND TANK DOWN TO 8 GALLONS. REPLACED OIL FILLER CAP SEALS FOR SUSPECTED SIPHONING ACTION. OPS AND LEAK CHECK, GOOD.

Part: SHAFT — SHEARED (OIL PUMP) · airframe 29,244 hrs

NR 4 ENGINE SHUT DOWN DUE TO 0 BMEP INDICATION AND EXCESSIVE LOSS OF OIL. REPLACED ENGINE DUE TO NOSE CASE OIL PUMP FAILURE AND HIGH METAL.

Part: FIRE WARNING — FALSE ACTIVATION (TAIL HEATER) · airframe 29,220 hrs

TAIL HEATER FIRE WARNING INTERMITTENTLY CAME ON AFTER HEATER CHECK. GROUND OPS CHECKED ANTI-ICE HEATER SYSTEM PER NAC DC-6 OPS MANUAL CH.14-20 SECT. C, CHECKED GOOD. INSPECTED HEATER FOR VISUAL DISTRESS, NONE NOTED.

Part: CYLINDER — CRACKED (NR 18) · airframe 29,173 hrs

NR 4 ENGINE SHUT DOWN DUE TO BACKFIRING. REPLACED NR 4 ENGINE, NR 18 CYLINDER DUE TO CRACKED HEAD. OP CHECKED GOOD.

Part: CYLINDER — MAKING METAL (NR 11) · airframe 29,104 hrs

NR 3 ENGINE DOUBLE SHORTED SECONDARY, ENGINE SHUT DOWN ON TAXI-IN. REPLACED NR 3 ENGINE ASSY. DUE TO NR 11 CYLINDER RING LAND/PISTON FAILURE. METAL IN SCREEN.

Part: TRANSMITTER — READS LOW (NR 2 ENGINE) · airframe 29,051 hrs

TAKE OFF ABORTED DUE TO NR 2 ENGINE LOW BMEP. NR 2 ENGINE BMEP DEFERRED: REPLACED BMEP TRANSMITTER.

Part: ENGINE — MALFUNCTIONED (NR 1) · airframe 29,017 hrs

NR 1 ENGINE LOSS OF OIL AND NO BMEP INDICATION. REPLACED NR 1 ENGINE ASSEMBLY.

Part: CARBURETOR — FAULTY (NR 1 ENGINE) · airframe 29,015 hrs

NR 1 ENGINE LEANS ITSELF OUT DURING FLIGHT AND ALL CLIMB CONFIGURATIONS. REPLACED NR 1 ENGINE CARBURETOR. CHECKED GOOD.

Part: CYLINDER — CRACKED · airframe 28,641 hrs

DISCREPANCY: #1 ENGINE SHUT DOWN DUE TO RUNNING ROUGH.CORRECTIVE ACTION: REPLACED #11 CYLINDER.

Part: CYLINDER — CRACKED (#4) · airframe 28,507 hrs

DISCREPANCY: #2 ENGINE SHUT DOWN DUE TO RUNNING ROUGH AND OIL LOSS.CORRECTIVE ACTION: REPLACED #2 ENGINE #4 CYLINDER.

airframe 28,412 hrs

DISCREPANCY: #4 ENGINE SHUT DOWN DUE TO CARBURETOR HEAT APPROACHING RED LINE AFTER GOING INTO REVERSE.CORRECTIVE ACTION: INSPECTED CARBURETOR INTAKE FOR FOREIGN OBJECTS, NONE FOUND. INSPECTED AIR DOOR FOR SECURITY, FOUND SECURE. RAN ENGINE TO 30" AND A REVERSE CHECK, ALL PARAMETERS FOUND OK. SUSPECT ICING CONDITION WAS THE FAULT.

Part: CYLINDER — CRACKED (NR 7) · airframe 28,224 hrs

NR 1 ENGINE PRECAUTIONARY SHUT DOWN FOR RUNNING ROUGH. FOUND NR 1 ENGINE NR 7 CYLINDER WITH A CRACKED HEAD. REPLACED CYLINDER, OP CHECK GOOD.

Part: SPARK PLUG — MALFUNCTIONED (NR 13 CYLINDER) · airframe 28,080 hrs

THE NUMBER 3 ENGINE STARTED BACKFIRING. REPLACED FRONT AND REAR SPARK PLUG ON NUMBER 13 CYLINDER.

Part: CYLINDER — CRACKED (#3 ENGINE) · airframe 28,040 hrs

DISCREPANCIES: #3 ENGINE BACKFIRE, LOW BMEP @ 0010Z.CORRECTIVE ACTION: REPLACED #3 ENGINE, #5 CYLINDER.

Part: CYLINDER — DEFECTIVE (NR 3 ENGINE) · airframe 27,984 hrs

SHUTDOWN THE NR 3 ENGINE DUE TO DOUBLE SHORTED SECONDARY CYLINDER NR 11 AND DOUBLE SHORTED SECONDARY CYLINDER NR 15. REMOVED AND REPLACED THE NR 11 AND NR 15 CYLINDERS.

Part: SPARK PLUG — SHORTED (NR 2 ENGINE) · airframe 27,908 hrs

FEATHERED THE NR 2 ENGINE AT 2041Z DUE TO BACKFIRING IN CLIMB, AND DOUBLE SHORTED SECONDARY ON THE NR 10 CYLINDER. REMOVED AND REPLACED THE NR 10 LT & RT SPARK PLUGS.

Part: SKIN — CRACKED (FUSELAGE) · airframe 27,795 hrs

LOWER SKIN CRACKED AT STRINGER 25 RT. REPAIRED PER BOEING ROD SKETCH 02-06-20-001.

Part: SKIN — CRACKED (FUSELAGE) · airframe 27,795 hrs

FUSELAGE SKIN CRACKED UNDER COPILOTS SLIDER WINDOW, IN 2 PLACES OUT OF RIVET HEAD. FABBED AND INSTALLED DOUBLER PATCH USING .032 7075-T6 PER DC-6 O/H MANUAL FIGURES 11-7, 11-37, 11-52, AND 12-22.

Part: ENGINE — MALFUNCTIONED (NR 3) · airframe 27,780 hrs

NR 3 ENGINE FEATHERED DUE TO BACKFIRING, AND DOUBLE SHORTED SECONDARY, NR 16 CYLINDER. BORESCOPED CYLINDER, NO DAMAGE REVEALED. COMPRESSION TESTED CYLINDER, 80/72. BARO POWER OPS CHECK GOOD, MAG DROP 4 + 4, NO SIGNIFICANT RPM SPLIT.

Part: CONNECTOR — DEFECTIVE (PROP GOVERNOR) · airframe 27,674 hrs

NR 2 PROPELLER UNCONTROLLABLE, WILL NOT TOGGLE. REPLACED CANNON PLUG AND BREEZE FROM THE NR 2 PROP GOV STEP HEAD MOTOR TO NOSE CASE J-BOX.

Part: CYLINDER — CRACKED (NR 1 ENGINE) · airframe 27,611 hrs

FEATHERED THE NR 1 ENGINE AT 2318Z DUE TO RUNNING ROUGH AND BACKFIRING. REMOVED AND REPLACED THE NR 13 CYLINDER ON THE NR 1 ENGINE.

Part: CYLINDER — CRACKED (NR 2 ENGINE) · airframe 27,332 hrs

NR 2 ENGINE RAPID LOSS OF BMEP, ROUGH RUNNING. REPLACED NR 2 CYLINDER.

Part: CYLINDER — CRACKED (NR 2 ENGINE) · airframe 27,281 hrs

SHUTDOWN NR 2 ENGINE AT 0315Z DUE TO LOW OIL QUANTITY. NR 4 CYLINDER CRACKED. REPLACED THE NR 4 CYLINDER.

Part: ENGINE — POWER LOSS (#1) · airframe 27,059 hrs

DISCRPANCY: Power loss #1 engine @ T.O. power @ 95 kts. BMEP & M.P. massive drop.CORRECTIVE ACTION: Performed engine run to field barometric and T.O. power settings multiple times. All parameters found to be satisfactory per NAC DC-6 Ops manual.

Part: CYLINDER — DEFECTIVE (NR 3 ENGINE) · airframe 26,755 hrs

FEATHERED THE NR 3 ENGINE AT 2311Z DUE TO LOW COMPRESSION INDICATION NR 2 CYLINDER. REPLACED THE NR 2 CYLINDER.

Part: CYLINDER — CRACKED (NR 2 ENGINE) · airframe 26,643 hrs

SHUT DOWN NR 2 ENGINE DUE TO ROUGHNESS AND OIL LOSS. (NR 4 CYLINDER CRACKED). REPLACED CYLINDER NR 4 ON THE NR 2 ENGINE.

Part: SPARK PLUG — SHORTED (NR 8 CYLINDER) · airframe 26,557 hrs

FEATHERED THE NR 3 ENGINE DUE TO BACKFIRING, DOUBLE SHORTED SECONDARY, NR 8 CYLINDER. REPLACED BOTH SPARK PLUGS.

Part: ACTUATOR — MALFUNCTIONED (NR 1 ENGINE) · airframe 26,460 hrs

DISCREPANCIES: FEATHERED NR 1 ENGINE AT 2033Z FOR EXCESSIVE OIL TEMP, UNABLE TO CONTROL COOLER DOOR. CORRECTIVE ACTION: REPLACED OIL COOLER DOOR ACTUATOR.

Part: INTAKE VALVE — BROKEN (#14 CYLINDER) · airframe 26,434 hrs

DISCREPANCIES: MECHANICAL INTERUPTION AT 0120, FEATHERED NR 4 ENGINE DUE TO LOSS OF POWER.ACTION TAKEN: REPALACED NR 14 CYLINDER ON NR 4 ENGINE DUE TO BROKEN INTAKE VALVE.

Part: CYLINDER — CRACKED (NR 3 ENGINE) · airframe 26,039 hrs

MECHANICAL INTERRUPTION AT 2028, TOP OF CLIMB. NR 3 ENGINE ROUGH, BACKFIRING IN DESCENT, 12 BMEP DROP. REPLACED NR 4 CYLINDER DUE TO CRACKED HEAD.

Part: WIRE — SHORTED (NR 1 ENGINE)

ANC - FLT 80 - RETURNED AT 1755Z DUE TO NR 1 PROPELLER LOST MANUAL CONTROL AND SYNC BREAKER TRIPPED. MAINTENANCE REPAIRED SHORTED 1023 WIRE AND REPLACED SYNC BOX. OVERWEIGHT LANDING INSPECTION COMPLETED AND AIRCRAFT RETURNED TO SERVICE. (X)

Part: PRIMARY LEAD — OPEN WIRE (NR 4 ENGINE)

FLT 60 - PRECAUTIONARY SHUT DOWN NR 4 ENGINE AT 0003Z DUE TO ENGINE ROUGHNESS NR 4 ENGINE NR 4 CYLINDER BOTH DISTRIBUTORS HAD AN OPEN AND THEN LOW COMRPESSION PATTERNS. MAINTENANCE REPLACED Y-LEAD, FRONT PLUG AND SHORT LEAD. AIRCRAFT RETURNED TO SERVICE. (X)

Part: CYLINDER — CRACKED (NR 4 ENGINE)

SCC/FAI - ON FERRY FLIGHT, AIRCRAFT RETURNED TO SCC DUE TO INTERMITTENT DOUBLE SHORTED SECONDARY NR 4 ENGINE, NR 3 CYLINDER. MAINTENANCE REPLACED NR 4 CYLINDER AND RETURNED AIRCRAFT TO SERVICE. (X)

Part: CYLINDER — CRACKED (NR 3 ENGINE)

FLT 60 - SHUT DOWN NR 3 ENGINE AT 2058Z DUE TO BACKFIRING AND BMEP DROP. MAINTENANCE REPLACED NR 9 CYLINDER AND RETURNED AIRCRAFT TO SERVICE. (X)

Part: CYLINDER — CRACKED (NR 2 ENGINE)

FLT 32 - SHUT DOWN NR 2 ENGINE AT 1245Z DUE TO ROUGH RUNNING AND UNABLE TO LEAN. MAINTENANCE REPLACED NR 16 CYLINDER DUE TO A CRACKED HEAD. AIRCRAFT RETURNED TO SERVICE.

Part: UPLATCH PIN — SHEARED (NOSE GEAR)

NOSE GEAR EXTENDS IN FLIGHT WHEN GEAR HANDLE IS PLACED IN THE NEUTRAL POSITION. REPLACED NOSE GEAR UPLATCH PIN AND SPACER ASSY. (Z)

Part: OIL COOLER — LEAKING (NR 3 ENGINE)

FLT NR 431 - SHUTDOWN NR 3 ENGINE DUE TO LOSS OF OIL AT 1907Z. REPLACED OIL COOLER DUE TO LEAKING. (Z)