N318DL

Part: MIXING VALVE — DIRTY (AILERON) · airframe 57,498 hrs · 43,326 cycles

CONTROL YOKE HAS DEAD ZONE FEEL PLUS/MINUS SIX DEGREES OF CENTER WITH NO AILERON MOVEMENT. REMOVED DIRT AND DEBRIS FROM AILERON MIXING UNIT.

Part: SKIN — GOUGED (FUSELAGE) · airframe 56,235 hrs · 42,361 cycles

THE FUSELAGE SKIN AND UNDERLYING BEARSTRAP WERE FOUND DENTED AND GOUGED AT THE AFT EDGE OF THE C2 DOOR CUTOUT AT STRINGER 22R. THE DAMAGE WAS REMOVED WITH A 1 X .75 INCH CUTOUT FROM THE DOOR CUTOUT EDGE. THE DAMAGE WAS REPAIRED WITH TWO EXTERNAL ALUMINUM DOUBLERS PER ER/A 088918-14, REV A.

Part: ACCESSORY UNIT — FAILED (MLG) · airframe 54,997 hrs · 41,377 cycles

IRR LANDING GEAR LEVER LOCK WOULD NOT RELEASE WHEN GEAR HANDLE WAS RAISED AFTER T/O. REPLACED LANDING GEAR ACCESSORY UNIT.

Part: DIAPHRAGM — MISSING (FWD LAV TANK) · airframe 53,227 hrs · 40,170 cycles

IRR/ NR 2 ENG HIGH VIBES AT FL 350. FLT DIVERTED TO RDU. VISUAL INSP FOUND EXTENSIVE FAN DAMAGE AND BLUE ICE COMING FROM FWD LAV SVC PANEL AND BLUE STAINS AT NR 2 ENG INLET. NR 2 ENG REPLACED RDU PER TRANS 3T214AD. FOUND FWD LAV TANK FILL VALVE LINE CHECK VALVE MISSING ITS DIAPHRAGM. REPLACED SAME. PRESSURIZED AIRCRAFT AND LEAK CHECKED. NO LEAKS FOUND.

Part: SKIN — DAMAGED (AILERON) · airframe 50,676 hrs · 39,100 cycles

DAMAGE TO UPPER SKIN OF AILERON. REPAIRED PER ER/A 410406-14.

Part: SKIN — DAMAGED (FUSELAGE) · airframe 50,654 hrs · 39,090 cycles

DAMAGE FOUND IN THE L2 DOOR SURROUND BEAR STRAP AT THE UPPER HINGE CUTOUT, THE SKIN IS ALSO DAMAGED AT THIS LOCATION. ER/A 360175-14 REV B.

Part: FITTING — WORN (PYLON) · airframe 50,654 hrs · 39,090 cycles

SUBJECT FWD ENGINE MOUNT SUPPORT FITTING ASSY WAS FOUND WITH OVERSIZED MOUNT HOLES. REPAIR PER ER/A 410315-14AD.

Part: INDICATOR — MALFUNCTIONED (COCKPIT) · airframe 46,239 hrs · 37,196 cycles

ON T/O 03 SLAT LED SLAT REMAINED INTRANSIT ON T/O AFTER FLAP RETRACTION. RETURNED TO MCO. ON EXTENSION 02 SLAT REMAINED INTRANSIT. INSPECTED SLATS, RAN SLATS THRU SEVERAL CYCLES. SLAT OPERATE NORMAL. UNABLE TO DUPLICATE PROBLEM.

Part: POWER SUPPLY — INOPERATIVE (ROW 6) · airframe 45,876 hrs · 37,034 cycles

OVERHEAD EMERGENCY LIGHT INOP AT SEAT ROW 6 DEF. REPLACED BATTERY PACK POWER SUPPLY.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 45,732 hrs · 36,971 cycles

EMERGENCY AISLE LIGHT INOP. REPLACED PWR SUPPLY M1135, OPS NORMAL.

Part: AIR DIST — ODOR (CABIN)

ELECTRICAL ODOR EMINATING FROM FWD CABIN (ROW 4 TO FWD GALLEY) SIMILAR TO VERY POTENT MATCH SMELL. INSPECTED ACFT ELECT SYS, GALLEY PWR, OVERHEAD AND SIDEWALL LIGHTS, ALL OK. RAN NR 1 AND NR 2 ENGINES, LOADED ELECT SYSYEMS NTF. RAN LT AND RT PACKS, NO ODOR DETECTED. OK FOR SERVICE.

Part: POWER SUPPLY — INOP (CABIN)

RIGHT FWD OVERHEAD EMERGENCY LIGHTS INOP. REPLACED POWER SUPPLY AND BATTERY. SYSTEM OPS NML.

Part: SKIN — CRACKED (BS 951)

THE UPPER HINGE CUTOUT OF THE AFT GALLEY DOOR (R2) CUTOUT WAS FOUND WITH A TYPICAL CRACK IN THE SKIN AND BONDED DOUBLER. THE CRACK WAS .4375 INCH LONG WITH NO CRACKING IN THE UNDERLYING BEAR STRAP. THE CRACK WAS ROUTED OUT OF THE SKIN ASSY AND REPAIRED WITH AN EXTERNAL DOUBLER PER B737 SRM 53-30-3, FIG 21A. THE REPAIR WAS ACCOMPLISHED WITH FASTENER DEVIATIONS PER ER/A 366761-14, REV A.

Part: FITTING — CORRODED (LT & RT MLG)

FUSELAGE, RT AND LT MLG SIDE STRUT SUPPORT FITTING, BS 685, REPAIR FOR O/S HOLE BORES. THE LT AND RT MLG SIDE STRUT SUPPORT FITTINGS WERE FOUND WITH CORROSION IN THE LOWER HOLE BORES OF THE FITTINGS. THE HOLES WERE OVERSIZED TO REMOVE THE CORROSION AND LARGER DIA BUSHINGS WERE INSTALLED. THE REPAIRS WERE ACCOMPLISHED PER ER/A 365903-14, REV A.

Part: FLOORBEAM — CRACKED (BS 520)

THE STATION 520 FLOORBEAM HAS DAMAGE IN THE TYPICAL LOCATIONS AT BOTH LBL 24.75 AND LBL 45.5. THE BEAMS ARE M/F FROM BAC1518-338, 7075-T6511 EXTRUSION. SUBMITTER STATES, THIS IS A GROUP 3 A/C PER S/B 737-53-1120, REV 1. REPAIRED PER ERA 330701-14 REV B.

Part: BATTERY PACK — DISCHARGED (CABIN)

ON L/O CHECK FOUND EMERGENCY LIGHT IN FRONT OF AFT CARGO DOOR INOP. REPLACED BATTERY PACK OPERATION NORMAL.

Part: BATTERY — DISCHARGED (CABIN)

FOUND ON LAYOVER 2 CHECK, FWD STEW FLASHLIGHT REMOVED FROM HOLDER BATTERY SPENT. REPLACED BATTERY P/N 2572 04896. CHECKS GOOD REINSTALLED AND SECURED.

Part: ACM — FAILED (RIGHT)

FLIGHT ATTENDANTS AND PASSENGERS REPORTED ODOR OF SMOKE IN VICINITY OF ROW 14, NO SMOKE DETECTED IN FLIGHT AND ON GROUND. RIGHT ACM FOUND SEIZED AND TURBINE BLADES DAMAGED. REPLACED ACM AND BOTH WATER SEPARATOR BAGS. CREW DECLARED EMERGENCY. NORMAL LANDING.

Part: RETRACT MECH — LACK OF LUBE (NR 2 LE SLAT)

ON APPROACH, NUMBER 2 SLAT FAILED TO EXTEND FULLY WHEN FLAPS WERE SELECTED TO 1 DEGREE. NUMBER 2 SLAT LATER EXTENDED FULLY AFTER POM PROCEDURE WAS COMPLIED WITH. INSPECTED AND LUBRICATED SLATS AND FLAPS, CYCLED SEVERAL TIMES, INDICATION AND OPERATION CHECKS NORMAL.

Part: HOSE — RUPTURED (NLG WW)

AFTER 15 TOUCH AND GO LANDINGS THE NOSE GEAR WOULD NOT EXTEND. LANDING GEAR WERE MANUALLY EXTENDED. AFTER THIS WAS ACCOMPLISHED PER THE CHECKLIST, THE A-HYD QTY IND WAS NOTED TO BE ZERO AND THE A-HYD PUMP LOW PRESSURE LIGHTS ILLUMINATED. ACCOMPLISHED A-HYD FAILURE CHECKLIST PER POM. LANDING WAS UNEVENTFUL. FOUND FLEX LINE FOR JURY BRACE ACT RUPTURED.

Part: BULKHEAD — CRACKED (BS 178)

THE STATION 178 BULKHEAD WAS FOUND CRACKED IN SEVERAL LOCATIONS. DAMAGE CUTOUTS ARE: 1 DIA AT RBL 5.7, WL 198; 1 BY 1.5 AT RBL 5.7, WL 201; 1 BY 1.5 AT LBL 5.7, WL 198; 1 BY 2 AT LBL 5.7, WL 201; AND 1 BY 1.5 AT BL 0, WL 188. THE BULKHEAD WEB IS FABRICATED FROM 0.032 CLAD 2024-T3. IN ADDITION, THE VERTICAL STIFFENER AT LBL 5.7 AND WL 184 WAS FOUND CRACKED. THE RESULTING CUTOUT REMOVES THE FLANGE COMMON TO THE BULKHEAD WEB. THE VERTICAL STIFFENER IS MANUFACTURED FROM 7075-T6 EXTRUSION PER BAC 1505-100361.

Part: SCAVENGE PUMP — FAILED (NR 2 ENGINE)

THE FOLLOWING IS A SUPPLEMENT TO MRR NR 960534. SUBEQUENT FINDINGS AFTER ENGINE TEAR DOWN REVEALED THAT THE NR 4 AND NR 5 SCAVENGE PUMP FAILED RESULTING IN THE OIL STARVATION AND FAILURE OF THE NR 4 BEARING AND SUBSEQUENT DAMAGE TO THE 12 AND 13 STAGE BLADES AND 12 STAGE DISK.

Part: ENGINE — FAILED (NR 2)

EXPERIENCED MULTIPLE COMPRESSOR STALLS ON NR 2 ENGINE AT APPROXIMATELY 6,000 FEET MSL ON DEP CVG INSTANTEOUS OVERTEMP ASSOCIATED WITH MODERATE VIBRATION ACCOMPANIED STALLS. VISUAL FLAMES ALSO ACCOMPANIED BACKFIRES. NO EXTERNAL DAMAGE OR EVIDENCE OF OTHER ABNORMAL COMPLICATIONS AFTER SHUT DOWN. EMERGENCY RETURN RUNWAY 18L. ACCOMPLISHED AT CVG. REPLACED NR 2 ENGINE AND ROUTED TO SHOP. ENGINE TOTAL CYCLES, 20,393.

Part: HYD LINE — BROKEN (NLG)

SYS A-HYD QTY LOSS ON APPROACH. FOUND HYD LINE BROKEN AT B-NUT ON NOSE GEAR ACTUATING CYLINDER. INSTALLED TEMP LINE CHANGED A-SYS FILTERS PRESS AND CASE DRAIN, LEAK CHKS OK.

Part: ACTUATOR — CRACKED (LT WING SPOILER)

ON APPROACH DURING FLAP EXTENSION, LOST A SYSTEM HYDRAULICS. PRESSURE AND QTY WENT TO ZERO, LANDED CVG. FOUND LEFT OUTBOARD SPOILER ACTUATOR WITH A CRACKED HOUSING. REPLACED ACTUATOR, OPERATION NORMAL.

Part: EEL — INOPERATIVE (R 2 DOOR)

DURING SERVICE CHECK, THE R-2 DOOR EMERGENCY EXIT LIGHT WAS FOUND INOP. REPLACED REFLECTOR AND BULB OPERATION NORMAL.