N312FL

Part: PROXIMITY SENSOR — FAULTY (LANDING GEAR) · airframe 39,197 hrs · 29,775 cycles

FLIGHT CREW REPORTED LANDING GEAR WARNING HORN STUCK ON WHEN FULLY CONFIGURED ON FINAL AND WOULD NOT SILENCE UNTIL FLAPS RETURNED TO UP POSITION AFTER LANDING. REPLACED PROXIMITY SENSOR 5853. OPS CHECKED GOOD.

Part: FIRE LOOP — FAULTY (NR 2 ENGINE) · airframe 37,563 hrs · 28,869 cycles

AIR RETURN, NR 2 ENG OVERHEAT CAUTION LIGHT ILLUM TWICE. DECLARED EMERGENCY, LANDED W/O INCIDENT. ON DESCENT, MASTER CAUTION SYS ILLUM 4 TIMES, NO SIX PACK INDICATION. MX TESTED CAUTION SYS THRU SIMULATION OF CONDITIONS CAUSING ILLUMIN ANNUNCIATORS, ALL SYS OPERATED NORM. COULD NOT DUPLICATE. REPLACED NR 2 ENG PRSOV, LEAK CHECKED OK. PERFORMED LEAK CHECK NR 2 ENG AIR DUCTS, NO LEAKS FOUND. RAN NR 2 ENG AT T/O POWER APPROX 2 MIN & ENG OVERHEAT LIGHT ILLUM. SWITCHED OVER TO A-LOOP, FAULT REMAINED. SWITCHED TO B-LOOP, FAULT WENT AWAY. PROBLEM COULD ONLY BE DUPLICATED WITH ENGINE HOT. PLACARD NR 2 ENG A-LOOP, COMPLIED WITH SPECIAL PROCEDURES. PERFORMED OVERWEIGHT LANDING INSPECTION, NO DEFECTS FOUND.

Part: PANEL — CRACKED (RT WING) · airframe 37,477 hrs · 28,819 cycles

DURING C-6 CHECK, INSPECTION REPORTED RT WING UPPER SURFACE AFT PYLON PANEL CRACKED AT AFT I/B CORNER AT FASTENER COMMON TO FUEL CELL. REPLACED PANEL PER SRM 51-40-02 AND 51-40-65.

Part: PANEL — DAMAGED (NR 1 PYLON) · airframe 37,477 hrs · 28,819 cycles

DURING C-6 CHECK, INSPECTION REPORTED SCREW BROKEN ON NR 1 PYLON TOP AFT FAIRING PANEL ATTACHED TO THE WING AND A CRACK FROM THE HOLE. REPLACED PANEL PER SRM 51-40-02, SRM 51-40-08 AND MM 28-11-00. PERFORMED LEAK CHECK. NO LEAKS NOTED.

Part: SUPPORT — BROKEN (T/E FLAP) · airframe 36,057 hrs · 27,990 cycles

DURING WALK-AROUND, FLIGHT CREW REPORTED NR 7 FLAP TRANSMISSION FLAP TRACK FAIRING A-FRAME ATTACH POINTS BROKEN. REPLACED NR 7 FLAP TRACK FAIRING A-FRAME AND SUPPORT STRUTS, ADJUSTED AND TESTED NR 7 FLAP, AND OPS CHECKED GOOD PER MM 27-51-52 AND OHM 57-53-35.

Part: FMC — FAULTY (E/E BAY) · airframe 32,010 hrs · 25,705 cycles

AIR TURNBACK. ON CLIMBOUT, THE FLIGHT CREW REPORTED THE ONLY MODE CONTROL WAS N1. NO AUTO-PILOT, NO AUTO THROTTLE OR MODE CONTROL. MAINTENANCE REMOVED AND REPLACED AIR DATA COMPUTER, FMCS AND OPERATIONS CHECK WAS NORMAL.

Part: PAN — CORRODED (FUSELAGE) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED AFT LAV PAN BETWEEN STA 1016 AND THE AFT PRESSURE BULKHEAD HAD THREE CORRODED FASTENERS ON RT SIDE, 16 INCHES FROM CENTER LINE. REMOVED CORRODED AREA ON CABIN FLOOR PAN AND INSTALLED A FILLER AND REPAIR DOUBLER PER EA 57-737-165 AND SRM 51-40-2.

Part: CHANNEL — CORRODED (FUSELAGE) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED CORROSION ON Z-CHANNEL AFT GALLEY SUPPORTS, STA 1028, BBL 10L AND BBL 10R. REPLACED CORRODED Z-CHANNEL PER EA 53-737-165, SRM 51-20-01, MM 51-21-99, SOPM 20-41-02 AND EA 53-737-171.

Part: SILL — CORRODED (FUSELAGE) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED FLOOR ANGLE CORRODED AT L1 ENTRY THRESHOLD, STA 312 TO 344. REMOVED L1 MOP SILL PER SRM 53-10-15. INSTALLED NEW MOP SILL PER SRM 51-40-02 AND 51-10-02.

Part: FRAME — CRACKED (FUSELAGE) · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED FRAME CRACKED AT BS 663.75, STR 1R AND 2R. REMOVED DAMAGE IN FRAME PER SRM 53-00-07 FIG 209. FABRICATED FILLERS AND REPAIRED AND INSTALLED FRAME PER SRM 53-00-07 FIG 209.

Part: STRAP — CORRODED (CARGO DOOR) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED CORROSION ON AFT CARGO COMPARTMENT DOOR FRAME UNDER UPPER FLANGE AT NUT PLATES AT STA 794, STR 25-R. REPLACED CORRODED RADIUS STRAP FROM STR 17R TO 27R PER SRM 51-40-02 AND 51-10-02.

Part: PANEL — CORRODED (CARGO BAY) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED AFT CARGO COMPARTMENT RT TRANSITION PANEL CORRODED FROM STA 767 TO STA 787. REPLACED TRANSITION PANEL PER SRM 51-40-02 AND 51-30-01.

Part: DOOR FRAME — CORRODED (CARGO DOOR) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED CORROSION ON AFT CARGO COMPARTMENT DOOR FRAME WEB FROM STR 23-R TO 25-R. FABRICATED AND INSTALLED REPLACEMENT WEB PER SRM 51-40-02 AND 51-10-02.

Part: NUT PLATE — CORRODED (FLOORBEAM) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED CORROSION ON NUT PLATES OF FLOORBEAM AT STA 344, LBL 10. REPAIRED DAMAGE PER SRM 53-00-51.

Part: STRAP — CORRODED (FUSELAGE) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED AFT CARGO COMPARTMENT FLOORBOARD TIE DOWN STRAP CORRODED AROUND SCREW HOLES. REPAIRED DAMAGE PER SRM 51-10-2, 51-40-02 AND SOPM 20-41-02.

Part: PANEL — CORRODED (CARGO BAY) · corrosion level 2 · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED CORROSION ON AFT CARGO COMPARTMENT RT TRANSITION PANEL FROM STA 767 TO 727. FABRICATED AND INSTALLED REPLACEMENT PANEL PER SRM 51-10-02 AND 51-40-02.

Part: INTERCOSTAL — CRACKED (FUSELAGE) · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED INTERCOSTAL AT STA 344-360, BL 0, CRACKED ON TOP FLANGE FWD END AND HAS DAMAGE ON BOTTOM FLANGE. FABRICATED REPAIR PARTS PER SRM 51-70-11 AND INSTALLED REPAIR PER SRM 51-40-02.

Part: CROSSBEAM — CRACKED (CARGO DOOR) · airframe 31,269 hrs · 25,360 cycles

DURING C-4 CHECK, INSPECTION REPORTED C-1 DOOR LOWER CROSSBEAM WEB CRACKED. REMOVED DAMAGED AREA, FABRICATED AND INSTALLED DOUBLER REPAIR PER SRM 51-70-13.

Part: SKIN — CRACKED (L/E SLAT) · airframe 31,269 hrs · 25,360 cycles

MAINTENANCE REPORTED SKIN CRACKED AT OUTBOARD END OF NR 6 SLAT. REMOVED DAMAGED AREA AND INSTALLED REPAIR PER SRM 57-43-01 FIG 206 AND SRM 51-40-02.

Part: TIRE — FAILED (NR 4 MAIN)

DEN - UPON ARRIVAL IN BOS, FLIGHT CREW REPORTED NR 4 MAIN TIRE RECAP MISSING. TIRE REMAINED INFLATED. MAINTENANCE IN BOS REPLACED NR 4 MAIN TIRE AND WHEEL ASSY AND PERFORMED TEMPORARY REPAIRS NECESSARY TO FERRY AIRCRAFT TO DEN. UPON ARRIVAL IN DEN, MAINTENANCE REPLACED THE NR 3 MAIN TIRE AND WHEEL ASSY AS A PRECAUTION; REPLACED THE RT INBOARD FORE FLAP, MID-FLAP AND AFT FLAP ASSEMBLIES; REMOVED THE RT LOWER MAIN LANDING GEAR DOOR AND INSTALLED PLACARD PER CDL 32-10-4; AND REPAIRED RT WING PANEL NR 8501 PER EA 57-737-026. INSPECTED DENT ON THE LEADING EDGE OF THE RT HORIZONTAL STABILIZER. CYCLES: 277. (X)