N504US

Part: POWER SUPPLY — DEFECTIVE (EMERGENCY LIGHTS) · airframe 69,427 hrs · 28,646 cycles

DURING OVERNIGHT MAINTENANCE FLOOR PROXIMITY LIGHTS DEFECTIVE FROM LAV D TO GALLEY G4B. MAINTENANCE REMOVED AND REPLACED POWER SUPPLY. OPERATIONAL CHECKED GOOD. A/C RETURNED TO SERVICE. Â

Part: CREASE BEAM — CORRODED · corrosion level 2 · airframe 55,542 hrs · 23,061 cycles

During "H" check found corrosion on floor to fuselage crease beam at BS 1636 RBL 60. Repaired per EA 55-187743.

Part: WEB — CRACKED · airframe 55,542 hrs · 23,061 cycles

During "H" check found crack in support intercostal web at BS 660 stringer 11L. Repaired per EA 55-187744.

Part: SUPPORT — CORRODED · corrosion level 2 · airframe 55,542 hrs · 23,061 cycles

During "H" check found corrosion on seat track support at BS 400 RBL 25. Repaired per EA 55-187555.

Part: KEELBEAM — CORRODED · corrosion level 2 · airframe 55,542 hrs · 23,061 cycles

During "H" check found corrosion on keel beam between BS 673-680. Repaired per EA 55-187742.

Part: FLOORBEAM — CRACKED (FUSELAGE) · airframe 55,542 hrs · 23,061 cycles

DURING "H" CHECK FOUND CRACK IN FLOORBEAM UPPER CAP AT BS 700 LBL 25. REPAIRED PER EA 55-187429.

Part: BATTERY PACK — DISCHARGED (ROW 34-38)

DURING SCHEDULED MAINTENANCE CHECKS, ESCAPE PATH LIGHTING AT ROWS 34 AND 38 WERE FOUND INOPERATIVE. MAINTENANCE REPLACED THE ASSOCIATED BATTERY/CHARGER PACK WITH SERVICEABLE UNIT.

Part: TRANSMITTER — MALFUNCTIONED (TE FLAPS)

AT FL370, RECEIVED TRAILING EDGE FLAP DISAGREE WARNING AND TRAILING EDGE FLAP ASYMMETRY EICAS MESSAGE. CREW PERFORMED COM PROCEDURE AND A DECISION WAS MADE TO DIVERT TO MSP FOR BETTER RUNWAY CONDITIONS. FLIGHT LANDED IN MSP WITHOUT INCIDENT. MAINTENANCE REPLACED THE NR 1 FLAP SLAT ELECTRONIC UNIT AND THE LEFT FLAP POSITION TRANSMITTER. OPERATIONAL CHECK WAS SATISFACTORY.

Part: TRANSMITTER — MALFUNCTIONED (LT LE SLAT)

SLAT ASYMMETRY MESSAGE DURING CLIMB WITH NO SLAT MOVEMENT SELECTED. COMPLIED WITH COM PROCEDURES. NO FURTHER PROBLEMS NOTED. CREW DECLARED AN EMERGENCY INTO MKE, AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT OUTBOARD SLAT DRIVE TRANSMITTER. SYSTEM OPERATIONAL TEST SATISFACTORY.

Part: EGT INDICATION — MALFUNCTIONED (NR 2 ENGINE)

TAKEOFF WAS ABORTED DUE TO NR 2 ENGINE EGT REACHING LIMITS. MAINTENANCE INSPECTED ENGINE PER MAINTENANCE MANUAL 71-00-00, FIG 308, PG 221 TO 223 AND FOUND NO DISCREPANCIES.

Part: SKIN — CRACKED (NR 2 PYLON)

DURING L-CHECK, FOUND CRACK IN NR 2 PYLON EXTERIOR SKIN AT THE OUTBOARD SIDE FORWARD TORQUE BOX LIGHTENING HOLE UPPER FORWARD CORNER. REPAIRED PER EA 55-150542.

Part: ELECTRONIC UNIT — MALFUNCTIONED (TE FLAPS)

DURING FLAP RETRACTION ON DEPARTURE WITH FLAP HANDLE IN UP POSITION, FLAP GAUGE INDICATED L/E FLAPS IN T/O POSITION. STATUS MESSAGE FLAP/SLAT ELEC, T/E SLAP ASYM APPEARED. AIRCRAFT DIVERTED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND TRAILING EDGE FLAPS LOCKED OUT AND LEADING EDGE FLAPS OK. REPLACED NR 1 FSEU, PERFORMED RESISTANCE CHECK ON SLAT LOSS CIRCUIT, PERFORMED SYSTEM CHECK AND OPERATIONAL CHECK OK.

Part: WARNING BELL — SOUNDED (COCKPIT)

DURING TAKEOFF ROTATION, WARNING BELL SOUNDED WITH NO LIGHT INDICATION. AIRCRAFT RETURNED TO TPA AND LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED AURAL WARNING TEST, CHECKED OK.

Part: OIL PRESS VALVE — MALFUNCTIONED (APU)

DURING CRUISE FLIGHT, APU OIL LOW LIGHT ANNUNCIATED. FLIGHT CREW SHUT DOWN APU AND DIVERTED TO LAS DUE TO NR 2 ENGINE IDG ON MEL. MAINTENANCE REPLACED APU OIL PRESSURE REGULATING VALVE, SERVICED APU WITH OIL, GROUND RAN APU FOR 3.5 HOURS AND NO OIL LOSS NOTED. REPLACED NR 2 ENGINE IDG.

Part: TRANSCEIVER — MALFUNCTIONED (FWD FUSELAGE)

DURING CRUISE, WEATHER RADAR DISPLAY ERRATIC AND UNRELIABLE. AIRCRAFT DIVERTED TO DTW AND LANDED WITHOUT INCIDENT. REPLACED THE LEFT TRANSCEIVER, PERFORMED MAINTENANCE BITE TEST, CHECKED OK.

Part: OIL PRESS IND — MALFUNCTIONED (NR 2 ENGINE)

DURING TAXI OUT, NR 2 ENGINE OIL PRESSURE DROPPED TO 14 PSI. NR 2 ENGINE WAS SHUT DOWN AND AIRCRAFT RETURNED TO GATE. MAINTENANCE PERSONNEL INSPECTED NR 2 ENGINE, NO SIGNS OF OIL LEAKAGE NOTED. BOTH ENGINES STARTED AND OPERATING PARAMETERS CHECKED GOOD.

Part: LONGERON — CRACKED (FS 1543)

DURING T-CHECK, FOUND A CRACK IN THE FLOOR SUPPORT STRINGER AT FS 1543 AT RBL 3. REPAIRED STRINGER (P/N 146N5444) PER EA 55-102076.

Part: CHORD — CORRODED (FS 1380-1440)

DURING T-CHECK, FOUND CORROSION ON THE AFT CARGO DOOR LOWER SILL INNER CHORD; BS 1380 - 1440. REPAIRED CHORD (P/N 146N8522-52) PER EA 55-99517.

Part: LONGERON — CORRODED (FS 1520)

DURING T-CHECK, FOUND CORROSION ON THE BS 1520 AFT CARGO FLOOR STRINGERS AT RBL 3 AND RBL 7. REPAIRED STRINGERS (P/N 146N5444) PER EA 55-102072.

Part: FITTING — CORRODED (BS 1383)

DURING T-CHECK, FOUND CORROSION ON THE AFT CARGO THRESHOLD SUPPORT CASTING BS 1383. REPLACED FITTING.

Part: BATTERY — DISCHARGED (CABIN)

DURING LINE CHECK, FOUND EMERGENCY LIGHTS L25, L31, L42, L33, AND L589 INOPERATIVE. REPLACED BATTERY IN M731 POWER SUPPLY AND OPERATIONAL CHECK NORMAL.

Part: ACM — MALFUNCTIONED (AFT FUSELAGE)

TAKEOFF WAS ABORTED AT 50 KTS DUE TO LOUD WHINE IN THE COCKPIT. COCKPIT TEMPERATURE WAS 85 DEGREES, WITH LEFT AIR CYCLE MACHINE MALFUNCTION. PLACARDED LEFT PACK INOPERABLE PER MEL 21-51-1. REPAIRED LEFT AIR CYCLE MACHINE PER MM 21-51-03, P. 201 IN BOS, SYSTEM CHECKED NORMAL.