N6174C

Part: UNKNOWN — LEAKING (FUEL SYSTEM) · airframe 56,452 hrs

A FUEL LEAK WAS DISCOVERED ON THE OTBD SIDE OF THE NR 3 NACELLE. THE FUEL LEAK WAS SUSPECTED TO BE FROM LOOSE RIVETS & BAD SEALANT. THE DOUBLER WAS REMOVED, THE AREA INSPECTED FOR DAMAGE & CORROSION & A NEW DOUBLER WAS MANUFACTURED & INSTALLED.

Part: SPAR CAP — CORRODED (RT WING) · airframe 56,175 hrs

CORROSION ON LOWER CTR SPAR CAP AT RWS 177, REMOVED CORROSION. PERFORMED VISUAL & HFEC INSPECTIONS, NO CORROSION DETECTED. FOUND WITHIN LIMITS IAW TO 1C-118A-3-1 APPENDIX III FIGURE C-2. TREATED & PRIMED AREA FOR CORROSION PROTECTION. APPLIED SEALANT FOR AERODYNAMIC SMOOTHNESS EO 1321.

Part: SKIN — CRACKED (WING) · airframe 56,110 hrs

RE-ENFORCING RING, SKIN & DOUBLER CRACKED AT CTR WING SECTION. CRACKS WERE FOUND IN THE WING SKIN, STATION 60 TO 60 DOUBLER & RE ENFORCING RING FOR PANEL PN 3479163, DOOR, CTR WING FUSELAGE FRAME CUT OUT, IN THE CTR WING SECTION OF THE AIRPLANE. THE CRACK IS AT WS 17R FWD OF STRINGER 20. STATION 60 TO 60 DOUBLER IS ALSO CRACKED AT WS 17L FWD OF STRINGER 20 EO 1306.

Part: ACCESS PANEL — CRACKED · airframe 56,110 hrs

CRACK IDENTIFIED ON NR 1 ALT FUEL TANK ACCESS DOOR DOUBLER. REPLACE DOOR DOUBLER EO 1305.

Part: SKIN — CORRODED (LWS 179) · airframe 55,672 hrs

DURING HEAVY MX FOUND CORRODED WING SKIN AND CENTER WING SPAR AT WING STATION 179L OF THE UPPER WING SURFACE.

Part: SKIN — CRACKED (LWS 211) · airframe 55,672 hrs

DURING HEAVY MX, FOUND CRACKED LOWER WING SKIN AT CENTER SPAR AFT FLANGE WING STA 211L.

Part: SKIN — CORRODED (BS 1030) · airframe 55,672 hrs

DURING HEAVY MX, FOUND CORRODED FUSELAGE SKIN AND DOUBLER AT FUSELAGE BS 1030 BETWEEN STR 2L AND 2R.

Part: DOUBLER — CRACKED (BS 259.5) · airframe 55,672 hrs

DURING HEAVY MX, FOUND CRACKED LANDING DOUBLER FOR PANEL 145 BETWEEN STRINGERS 23R AND 25R AT WING STATION 259.5R.

Part: FRAME — CRACKED (BS 1053) · airframe 55,672 hrs

DURING HEAVY MX, FOUND CRACKED FUSELAGE FRAME AT FUSELAGE STA 1053 BETWEEN STRINGERS 12L AND 14L.

Part: SKIN — CRACKED (LWS 70) · airframe 55,672 hrs

DURING HEAVY MX FOUND CRACKED WING SKIN AT WING STATION 70L BETWEEN STRINGERS 1 AND 2. AND ANOTHER CRACK AT WING STATION 70L AT STRINGER 5.

Part: SKIN — CORRODED (BS 724) · airframe 55,672 hrs

DURING HEAVY MX FOUND CORRODED SKIN LAP AT FUSELAGE STA 724, STRINGER 13R.

Part: MASTER ROD — BROKEN (NR 4 ENGINE) · airframe 55,492 hrs

NR 4 ENGINE SHUTDOWN DUE TO FIRE WARNING INDICATION. FIRE EXTINGUISHED AND AIRCRAFT LANDED WITHOUT INCIDENT. NR 9 CYL WALL RUPTURED DUE TO BROKEN MASTER ROD CAUSING AN OIL FIRE. ENGINE QEC ASSEMBLY REPLACED NO DAMAGE TO THE AIRFRAME.

Part: SPAR — CRACKED (RT WING) · airframe 54,775 hrs

THE CENTER SPAR WEB WAS FOUND CRACKED AT W/S 90R. REPAIRED PER EAC EO 1103 AND 8110-3 DATED 2/12/11

Part: STRINGER — CRACKED (RT WING) · airframe 54,775 hrs

RIGHT WING STRINGER CRACKED AT WS 90R. REPAIRED IAW EAC EO 1104 AND 8110-3 DATED 2/12/11.

Part: STRINGER — CRACKED (LT WING) · airframe 54,775 hrs

DISCOVERED CRACKED STRINGER 23L AT WING STA 90L. REPAIRED IAW EAC EO 1105 AND 8110-3 DATED 2/12/11.

Part: HEATER — CRACKED (CABIN) · airframe 54,543 hrs

SHUTDOWN CABIN HEATER DUE TO POSSIBLE CO2 LEAK. REPLACED CABIN HEATER IAW AB LMM 27-55 PARA 2. OPS AND LEAK CHECK GOOD.

Part: OIL SYSTEM — LOW PRESSURE (NR 1 ENGINE) · airframe 53,377 hrs

NR 1 ENGINE SHUT DOWN DUE TO NO OIL PRESSURE. REMOVED AND REPLACED ENGINE DUE TO INTERNAL FAILURE, REF: NAC DC6MM SEC V PG 3.

Part: PUMP — POWER LOSS (NR 3 ENGINE) · airframe 53,262 hrs

NR 3 ENGINE SHUT DOWN DUE TO LOSS OF BMEP. INSPECTION REVEALED FRONT OIL PUMP DRIVE FAILURE. REPLACED NR 3 ENGINE, REF: NAC DC6MM SECT V PG 3, 4 AND 5. CHECKED GOOD ON RUN-UP.

Part: CYLINDER — CRACKED (NR 2 ENGINE) · airframe 53,124 hrs

NR 2 ENGINE SHUT DOWN DUE TO RUNNING ROUGH. REPLACED NR 18 CYLINDER DUE TO CRACKED HEAD. REF: NAC DC-6 MM SECT V PG 16 AND 16A.

Part: BOLT — SHEARED (MLG UPLOCK) · airframe 53,003 hrs

LANDING GEAR UNSAFE CONDITION IN NEUTRAL. FOUND RIGHT UPLATCH SHEAR BOLT SHEARED. REPLACED BOLT AND PERFORMED GEAR SWING PER NAC PURDUE MB6-0-1. OPS CHECKED GOOD.

Part: BUNGEE — BROKEN (LT MLG) · airframe 52,824 hrs

LEFT MAIN GEAR LIGHT DID NOT ILLUMINATE ON LANDING. RED TRANSIT LIGHT WAS ON. MADE VISUAL INSPECTION FROM CAPTAINS WINDOW AND A LOW PASS FOR MAINTENANCE TO INSPECT. FOUND INBD BUNGEE/SPRING BROKEN, REPLACED. LMLG DOOR SLIDER ROD BENT, REPLACED ROD AND RIGGED. REF: DOUGLAS MM CH 26-9-3. OP CHECKED GOOD.

Part: CYLINDER — CRACKED (NR 4) · airframe 52,738 hrs

NR 2 ENGINE SHUT DOWN DUE TO LOW COMPRESSION INDICATION ON NR 4 CYLINDER. REPLACED NR 4 CYLINDER DUE TO A CRACKED HEAD PER NAC DC-6MM SECT V PG 16 AND 16A. OP AND LEAK CHECKED GOOD.

Part: ENGINE — FAILED (NR 4) · airframe 52,493 hrs

NR 4 ENGINE RAPID OIL LOSS ON DEPARTURE. REPLACED NR 4 ENGINE DUE TO INTERNAL FAILURE. REF: NAC DC-6MM SEC V PG 1-9.

Part: SKIN — PUNCTURED (LT EING) · airframe 52,206 hrs

TOP LEFT HAND WING STA 286 HAS PUNCTURE IN WING SKIN LEAKING FUEL. THE DAMAGED AREA WAS REMOVED, EXAMINED USING NDT, AND AN EXTERNAL DOUBLER INSTALLED PER FAA DER DRAWING NAC2006-02, DATED 29 MARCH 2006 AND FAA 8110-3, DATED 29 MARCH 2006.

Part: RING — FAILED (NR 6 CYLINDER) · airframe 52,205 hrs

NR 2 ENGINE SHUT DOWN DUE TO BACKFIRING AT CRUISE, LOW COMPRESSION INDICATION ON NR 6 CYLINDER. REPLACED NR 6 CYLINDER DUE TO RING LAND FAILURE, PER NAC DC-6MM SEC V PG 16 & 16A. OPERATIONAL CHECK GOOD.

Part: CARBURETOR — ICED (NR 4 ENGINE) · airframe 52,117 hrs

NR 4 ENGINE LOW BMEP AND LOW RPM. PERFORMED 30 INCH BAROMETRIC RUN PER NAC DC-6 OPS MANUAL SECT 9.200 DETERMINED CARB ICE TO BE PRESENT. RAN ENGINE TO GREEN RPM, ENGAGED CARB HEAT UNTIL IN GREEN RANGE. CLEANED ICE FROM CARBURETOR , RAN TO 30 INCH, OP CHECKED GOOD PER OPS MANUAL. 2100 RPM, 30 INCH 610 F/F, 6/4 DROP, 123 BMEP.

Part: HEATER — LEAKING · airframe 52,118 hrs

SUSPECT CABIN HEATER EXHAUST FUMES IN COCKPIT.REPLACED CABIN HEATER ASSEMBLY. LEAK AND OP CHECKED GOOD. REF: NAC MM. SEC. VII. PAGE 81 AND 82.

Part: DOWNLOCK SWITCH — SHORTED (RT MLG) · airframe 52,070 hrs

RIGHT MAIN LANDING GEAR LIGHT NOT ILLUMINATING. REPLACED WIRE 6W232A-18 BY SPLICING IN 3.5 INCHES OF M22759/16789 AT DOWNLOCK SWITCH (RT) IAW DOUGLAS PRINT 54W426 (7705220). REPLACED RT DOWNLOCK SWITCH AND TESTED IAW PURDUE MANUAL MB 6-0-6 ITEM 9, OK FOR SERVICE.

Part: SPARK PLUG — FOULED (4 ENG/16 CYL) · airframe 52,062 hrs

NR 4 ENGINE SHUTDOWN DUE TO EXCESSIVE BACKFIRING, SUSPECT NR 16 CYLINDER. REPLACED NR 4 ENGINE NR 16 CYLINDER FRONT SPARK PLUG AND SHORT LEAD IAW 6-11 AND 6-12 MB PAGES 6-31 AND 6-34.

Part: CYLINDER — CRACKED (NR 8) · airframe 51,967 hrs

NR 1 ENGINE PRECAUTIONARY SHUTDOWN DUE TO BACKFIRING AND RUNNING ROUGH. REPLACED NR 8 CYLINDER DUE TO CRACKED HEAD IAW DC-6MM SECT V, PG 16 & 16A. OP CHECKED GOOD.

Part: STRINGER — CRACKED (LT WING) · airframe 51,959 hrs

VISUAL INSPECTION REVEALS 1.5 INCH LONG CRACK ON LEFT WING STRINGER NR 17 AT WING STA 299.5 WHICH WAS DISCOVERED DURING SCHEDULED MAINTENANCE OPERATIONAL CHECK NR 5. MANUFACTURED AND INSTALLED EXTERNAL DOUBLER AND TRIPLER IAW DRAWING NAC2005-25, REV 1R, DATED 22 OCTOBER 2005 PROVIDED BY (STRUCTURES) DER DERT-510232-CE, AND FAA FORM 8110-3, DATED 22 OCTOBER 2005.

Part: PUMP — CRACKED (HYD SYSTEM) · airframe 51,899 hrs

NR 2 ENGINE HYDRAULIC FAILURE ON APPROACH. HAD TO USE EMERGENCY AIR BRAKE UPON LANDING. INSPECTED AND FOUND HYDRAULIC PUMP CASE CRACKED AND TOTAL HYDRAULIC FLUID LOSS. REPLACED NR 2 ENGINE HYDRAULIC PUMP. LEAK AND OP CHECKED GOOD.

Part: CYLINDER — CRACKED (NR 17) · airframe 51,332 hrs

NR 1 ENGINE FEATHERED ON GROUND DUE TO OIL LEAK. REPLACED NR 17 CYLINDER DUE TO A CRACKED HEAD. OP AND LEAK CHECK GOOD.

Part: CONTACT — DIRTY (ELEC CONNECTOR) · airframe 51,286 hrs

TAKEOFF WARNING HORN DURING TAKEOFF ROLL. CLEANED CONTACTS ON FLAP INDICATOR ELECTRICAL CONNECTOR. OP CHECKED GOOD.

Part: CYLINDER — CRACKED (NR 3) · airframe 51,287 hrs

NR 4 ENGINE SHUT DOWN DUE TO RUNNING ROUGH. NR 4 ENGINE NR 3 CYLINDER CRACKED, REPLACED CYLINDER AND OP CHECKED GOOD.

Part: SPARK PLUG — CRACKED (NR 12 CYLINDER) · airframe 51,014 hrs

NR 1 ENGINE SHUT DOWN DUE TO BACKFIRING AND RUNNING ROUGH. FOUND NR 12 CYLINDER FRONT AND REAR SPARK PLUGS WITH CRACKED CERAMICS. REPLACED PLUGS, OP CHECKED GOOD.

Part: WIRE — SHORTED (LT MLG) · airframe 51,007 hrs

LEFT MAIN LANDING GEAR LIGHT DID NOT ILLUMINATE, NO GEAR WARNING HORN. FOUND LEFT HAND MAIN LANDING GEAR DOWN AND LOCKED SWITCH WIRES SHORTING AGAINST NR 1 MAIN WHEEL. REPAIRED AND SECURED WIRES. OP CHECKED GOOD.

Part: CYLINDER — BURNED (NR 2) · airframe 51,000 hrs

NR 4 ENGINE SHUT DOWN DUE TO LOSS OF OIL AND DOUBLE SHORTED SECONDARY NR 2 CYLINDER. TEMPORARY INSTALLED NEW NR 2 CYLINDER ON NR 4 ENGINE FOR FERRY FLIGHT.

Part: CYLINDER — CRACKED (NR 16) · airframe 50,937 hrs

NR 2 ENGINE SHUT DOWN DUE TO BACKFIRING AND RUNNING ROUGH. REPLACED NR 16 CYLINDER DUE TO A CRACKED HEAD. CHECKED GOOD.

Part: CYLINDER — CRACKED (NR 4) · airframe 50,871 hrs

NR 1 ENGINE SHUT DOWN DUE TO RUNNING ROUGH. REPLACED NR 1 ENGINE NR 4 CYLINDER DUE TO A CRACKED HEAD. CHECKED GOOD.

Part: GOVERNOR — INOPERATIVE (NR 2) · airframe 50,794 hrs

NR 2 PROPELLER OVERSPEED, UNCONTROLLABLE, WOULD NOT FEATHER. FOUND PROPELLOR GOVERNOR INOPERATIVE. REPLACED PROP GOVERNOR. LEAK AND OP CHECKED GOOD.