N792CP

Part: THRESHOLD — CORRODED (ZONE 100) · corrosion level 2 · airframe 31,269 hrs · 31,795 cycles

MED THRESHOLD MEMBER PN: 85329539 CORRODED AT SCREW HOLES AND BEYOND MANUFACTURES LIMITS. PART REPLACEMENT IS REQUIRED.

Part: BRACKET — LOOSE (ZONE 100) · airframe 30,004 hrs · 31,100 cycles

THE THIRD OCCURRENCE OF N. DOOR GEAR DOOR ADVISORY LIGHT ILLUMINATED AFTER NORMAL GEAR EXTENSION OR RETRACTION. THE FOLLOWING TROUBLESHOOTING AND COMPONENT REPLACEMENTS/MAINTENANCE ACTIONS WERE TAKEN. FIRST OCCURRENCE; FOUND NOSE GEAR CLOSED PROXIMITY SENSOR OUT OF RIG. ADJUSTED NOSE GEAR DOOR CLOSED PROXIMITY SENSOR. OPS CHECK GOOD ON THE GROUND AND CONDUCTED OPERATIONAL CHECK FLIGHT WITH NO FAULTS. THE AIRCRAFT WAS RETURNED TO SERVICE AND COMPLETED THE FLIGHT FROM PAKU TO PANC WITH NO DISCREPANCIES. AIRCRAFT THEN AIRCRAFT COMPLETED AN ADDITIONAL 6 REVENUE FLIGHTS BEFORE THE NEXT DISCREPANCY. SECOND OCCURRENCE; MAINTENANCE FOUND PSEU CODES NGDRCL FAULT UNREASONABLE FAR AND PSEU CHAN D FAIL CHANNEL INOP. COMPLETED FIM FIM TASK FIM 32-10-00-810-801. REPLACED PSEU, COMPLETED 11 LANDING GEAR SWINGS AND ONE INFLIGHT FUNCTION CHECK, ALL WITH NO DEFECTS. THIRD OCCURRENCE; REPLACED NLG SOLENOID SEQUENCE VALVE DUE TO SUSPECTED HISTORY OF THIS LRU. FOUND MOUNTING BRACKET FOR NLG PRIMARY LOCK PROXIMITY SENSORS LOOSE, REMOVED, INSPECTED CONDITION, AND REINSTALLED SAME (WE THINK THIS IS GOING TO BE THE FIX FOR THIS PROBLEM). CONTACTED DEHAVILLAND INSERVICE ENGINEERING GROUP FOR ADDITIONAL GUIDANCE AND THEY SUGGESTED COMPLETING RESISTANCE CHECKS OF NLG DOWN LOCK SENSOR HARNESS, THIS WAS COMPLETED WITH NO FAULTS FOUND, SO WE REPLACED THE COMPLETE HARNESS WITH NEW. COMPLETED 14 NORMAL LANDING GEAR EXTENSION/RETRACTION CYCLES AND 5 ALTERNATE LANDING GEAR EXTENSION CYCLES WITH AIRCRAFT IN THE HANGAR ON JACKS. THE AIRCRAFT HAS BEEN ISSUED AN AIRWORTHINESS RELEASE AND IS CURRENTLY CONDUCTING A FLIGHT TO CHECK THE LANDING GEAR UNDER FLIGHT LOAD/ENVIRONMENTAL CONDITIONS.

Part: CLEAT — CORRODED · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME UNDERFLOOR FS X156.00 STR. 24P CORROSION ON UPPER AND LOWER SURFACES OF BRACKET. CORROSION BEYOND MANUFACTURES LIMITS, PART REPLACEMENT REQUIRED. NOTE: RESUBMITTING THIS SDR DUE TO A CORRECTED PN. PN 85328131-120 WAS LISTED ON ORIGINAL SDR AND THE CORRECT PN IS 85328131-175.

Part: CLEAT — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME UNDERFLOOR FS X236.00 STR. 27P, LIGHT CORROSION FOUND ON BRACKET SURFACE. POSSIBLE CORROSION UNDER FASTENER. DISASSEMBLY MAY BE REQUIRED. AFTER DISASSEMBLY, IT WAS DETERMINED THAT CLEAT PN 85328131-164 NEEDED TO BE REPLACED DUE TO CORROSION.

Part: BRACKET — CORRODED (ZONE 500) · airframe 29,818 hrs · 30,995 cycles

LH OUTBD FLAP, AFT FAIRING 526AB ATTACHMENT BRACKET INBD LUG HAS CHAFFING MARK, BOLTS FOUND LOOSE. AREA 1. DAMAGE DEPTH 0.003", LENGTH 0.570", WIDTH 0.200". AREA 2. DAMAGE DEPTH 0.015", LENGTH 0.100", WIDTH 0.400". AREA 3. DAMAGE DEPTH 0.025", LENGTH 1.300", WIDTH 0.850".

Part: HINGE — CORRODED (ZONE 600) · airframe 29,818 hrs · 30,995 cycles

RH INBD SPOILER, INBD HINGE, CHAFING WEAR ON BOTH AIRCRAFT FITTING AND SPOILER FITTING. DAMAGE MAX DEPTH IS 0.018", MAX WIDTH IS 0.600" AND DAMAGE LENGTH IS 1.700".

Part: SKIN — CORRODED (ZONE 200) · airframe 29,818 hrs · 30,995 cycles

UPPER FUSELAGE OUTER SKIN AT FS X469 TO FS X553 BETWEEN STR. 12S AND 3S CHAFED ALONG WITH TO FUSELAGE FAIRING SEAL (AFT RG WING TO FUSELAGE FAIRING).

Part: SKIN — CORRODED (ZONE 200) · airframe 29,818 hrs · 30,995 cycles

UPPER FUSELAGE OUTER SKIN AT FS X321 TO FS X373 AND STR 12P AND 12S CHAFED.

Part: SKIN PANEL — CORRODED (ZONE 200) · airframe 29,818 hrs · 30,995 cycles

UPPER FUSELAGE OUTER SKIN AT FSX69 TO FSX553 AND STR12P TO STR3P CHAFED ALONG WING TO FUSELAGE FAIRING SEAL (AFT LH WING TO FUSE FAIRING).

Part: HINGE BRACKET — CORRODED (ZONE 300) · airframe 29,818 hrs · 30,995 cycles

CHAFING DAMAGE ON LOWER HINGE BRACKET OF RUDDER FITTING OF AIRCRAFT (LOWER FITTING).

Part: INTERCOSTAL — CORRODED · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

CORROSION FOUND ON FLOOR PANEL SUPPORT INTERCOSTAL STA. X1.000 AND LBL33. CORROSION OUT OF LIMITS AND REQUIRES AN RD TO SPLICE A REPLACEMENT SECTION.

Part: CLEAT — CORRODED (ZONE 100) · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME UNDERFLOOR FS X236.00 CORROSION ON BRACKET SURFACE UNDER FASTENER AT STR. 24S, 25S, AND STR. 26S. CORROSION BEYOND MANUFACTURES LIMITS, PART REPLACEMENT REQUIRED.

Part: BRACKET — CORRODED (ZONE 100) · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME FS X216.00, STRINGER Y24P FLOORBOARD BRACKET MOUNT HOLE CORROSION DAMAGE. CORROSION BEYOND MANUFACTURES LIMITS, REPLACEMENT REQUIRED.

Part: CLEAT — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME UNDERFLOOR FS X236.00, STR. 25P, CORROSION FOUND ON SURFACE OF BRACKET. CORROSION OUT OF MFG. LIMITS, REPLACEMENT REQUIRED.

Part: CLEAT — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME UNDERFLOOR FS X156.0 STR. 24S CORROSION ON LOWER SURFACE OF BRACKET. CORROSION BEYOND MANUFACTURES LIMITS, REPLACEMENT REQUIRED.

Part: CLEAT — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME UNDERFLOOR FS X136.00 STR. 24P CORROSION ON UNDERSIDE OF BRACKET. CORROSION BEYOND MANUFACTURES LIMITS, PART REPLACEMENT REQUIRED.

Part: CLEAT — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

FUSELAGE FRAME FS X 216.00, STR. 24P, CORROSION BETWEEN CLEAT AND STR. 24P. CORROSION BEYOND MANUFACTURES LIMITS, PART REPLACEMENT REQUIRED.

Part: SHEAR WEB — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

BAGGAGE COMPARTMENT AFT SHEAR WEB PN: 85339627-111 CORRODED AT MULTIPLE SPOTS BETWEEN FS STA. X712 - X788. SRM 53-40-43 ALLOWS SOME BLENDING BUT DOES NOT ALLOW BLENDING AROUND THE RADIUS OF A LIGHTNING HOLE. CORROSION AT STA. X771 IS IN THE STAY-OUT AREA OF THE LIGHTNING HOLES. REPLACEMENT IS REQUIRED.

Part: THRESHOLD — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

PASSENGER MAIN ENTRANCE DOOR THRESHOLD SUPPORT CHANNEL PN: 85329540-001 CORRODED ON UPPER AND LOWER SURFACE. SRM 53-20-23-02-01 ONLY ALLOWS BLENDING OF THE UPPER SURFACE, REPLACEMENT REQUIRED.

Part: SHEAR WEB — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

BAGGAGE COMPARTMENT AFT SHEAR WEB PN: 85339527-107SP CORRODED AT FS STA. X707 AND LBL 35. THIS CORROSION FALLS OUTSIDE THE ALLOWABLE BLEND AREA OF SRM 53-40-43. REPLACEMENT IS REQUIRED.

Part: NONE — CORRODED (ZONE 100) · corrosion level 2 · airframe 29,818 hrs · 30,995 cycles

LH AFT SEAT FLOOR RAIL P/N: 85338210-111 CORRODED AT AFT TIE DOWN RING IN AFT BAGGAGE COMPARTMENT. MEASURED AT 0.060" BEFORE BLENDING AND LIMIT IS 0.040" PER SRM 53-40-49. NEW REPLACEMENT FLOOR RAIL WILL BE INSTALLED.

Part: POWER SUPPLY — FAILED (ZONE 200) · airframe 29,648 hrs · 30,902 cycles

LEFT AFT PAX DOOR EMERGENCY EXIT SIGN INOP. CORRECTION: REPLACED EMERGENCY LIGHTS POWER SUPPLY IAW Q400 AMM 33-51-01-400-801. OPERATIONAL CHECK GOOD.

Part: I/O MODULE — MALFUNCTIONED (FUEL HEATER) · airframe 28,129 hrs · 30,010 cycles

RIGHT FUEL TANK TEMP INDICATED +99°C WITH FIRE BELL. REMOVED AND REPLACED THE RT FUEL HEATER THERMAL ACTUATOR INAW DHC-8-400 AMM 73-11-05 (FOR THE FUEL OVERHEAT). SWAPPED INPUT/OUTPUT MODULE (IOM) POSITIONS IAW Q400 AMM 31-41-11 (FOR TROUBLE SHOOTING THE FIRE BELL SOUNDING).