N1427A

Service difficulty reports · 457

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

Query with SQL
duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE n_number = 'N1427A' AND registry_match = 'registration'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SDR UIEA2024021000084Actuator · leakingENG 2, LH T/REVERSER HYD ACTUATOR WITH LEAK EVIDENCE.(<P>ENG 2, LH T/REVERSER HYD ACTUATOR WAS REPLACED PER AMM 78-31-06-404-006-H00 REV 140, AUG 22-2023</P>)Feb 18, 2024 · N1427A · Boeing 767306 · Engine Thrust ReverserSDR UIEA2024021000085Servo · leakingRUDDER - YAW DAMPER SERVO ASSY LH AND RH WITH LEAK(<P> LH AND RH RUDDER WERE REPLACED PER AMM 27-21-00. OPS CHK GOOD. </P>)Feb 18, 2024 · N1427A · Boeing 767306 · Rudder Control SystemSDR UIEA2023042400381Relay · unknownAFT CARGO DOOR EICAS MSG IMMEDIATELY AFTER TAKEOFF (APPROX 100' AGL)REMAINED ON AT LEAST THRU 5000' ON DESCENDING, FOR RETURN TO PDX(<P>INSPECTED AND FOUND CARGO DOOR INDICATION INTERMITTENT. TRANSFER TO MDDR 184404, CAT C DUE 04MAY23. MX ACTIONS COMPLIED WITHApr 24, 2023 · N1427A · Boeing 767306 · DoorsSDR UIEA2022092601046None · noneFOUND LEFT AND RIAGHT OVERHEAD EMERGENCY LIGHTS IN COCKPIT INOP.(<P><SPAN>RELAMPED LIGHTS , OPS CHECKS NORMAL IAW AMM 33-51-11.</SPAN></P>)Sep 23, 2022 · N1427A · Boeing 767306 · Lighting SystemSDR UIEA2022070100704Fuel Tank · leakingWING CENTER TANK, RH SIDE, FROM L-11 TO L-1C AND BBL 97.42, FUEL LEAK ON JOINS (AUXILIAR CENTER TANK, RH SIDE, ROOT OF FUEL LEAK AT RBBL 97.42 AND STGR L-6 WAS REPAIRED IAW AMM 28-11-00</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Fuel StorageSDR UIEA2022070100706Hydraulic Line · leakingAREA AFT OF PRESS BULK HEAD TO BS 1725.5, ELEVATOR FEEL COMPUTER, EVIDENCE OF LEAK ON LOWER HYD TUBES. (BTW STA 1702.2 AND 1725.5, LH SIDE).(THE ELEVATOR FEEL COMPUTER WAS INSTALLED CORRECTLY AS PER AMM 27-31-19-424-015, REV 136</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Elevator Tab Control SystemSDR UIEA2022070100707Actuator · leakingRH WING, INBOARD AILERON, ACTUATORS, LEAK EVIDENCE (LEAK CHECK HAS BEEN PERFORMED ON THE RH INBOARD AILERON ACTUATORS AND NO LEAKS WERE FOUND. TEST PERFORMED IN ACCORDANCE WITH AMM 29-11-00-796-053, REV 135</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Hydraulic Power Accumulator, MainSDR UIEA2022070100708Bearing · cokedENG 2, CORE SECTION BEARING NO.6 PRESSURE AND RETURN PIPES WITH OIL LEAK EVIDENCE (OIL COKE BUILD UP WAS REMOVED AND THE NUTS WERE RE-TORQUED PER AMM 72-50-00-216-032 AND 72-53-04-434-020, REV. 135</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Turbine SectionSDR UIEA2022070100709Access Panel · contaminatedLEFT WING, IN ACCESS PANELS 551TB AND 551UB WITH EWIS CONTAMINATED OF HYDRAULIC(EWIS WAS CLEANED PER SWPM 20-10-04, REV 80</P>)Jul 13, 2022 · N1427A · Boeing 767306 · APU Cowling/ContainmentSDR UIEA2022070700741Ecs · inoperativeDURING RUN TEST, ONE INDICATION OF AIR TEMPERATURE OF ECS IN EICAS, IS MISSING. PACK OUTLET TEMPERATURE BULB AND COMPRESOR OUTLET SENSOR WAS INSTALLED AS PER AMM 21-51-06-404-011 AND AMM 21-52-06-404-010, REV 136</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Cabin Cooling SystemSDR UIEA2022070700743Pca · leakingDURING THE DEVELOPMENT OF THE TASK CARD HYDRAULIC POWER LEAK CHECK, RH WING, WAS FOUND WITH INTERNAL LEAK EVIDENCE AT THE O/B AILERON PCA(LEAK TEST WAS PERFORMED ON RH OUTBOARD AILERON PCA´S, NO LEAKS WERE FOUN. TEST PEFORMED IAW AMM 29-11-00-796-053, REV 135Jul 13, 2022 · N1427A · Boeing 767306 · Hydraulic System, MainSDR UIEA2022070700744Lcca · leakingLEFT WING, WELL WHEEL ZONE LEFT TOP LCCA WITH LEAK EVIDENCE. LEAK TEST WAS PERFORMED ON LEFT TOP LCCA AND NO LEAK FOUND. REF. AMM 29-11-00-796-053, REV. 135</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Hydraulic System, MainSDR UIEA2022070700745Lcca · leakingLEFT WING, WELL WHEEL ZONE LEFT BOTTOM LCCA WITH LEAK EVIDENCE. LEAK TEST WAS PERFORMED ON THE LH BOTTOM LCCA, NO LEAKS FOUND. REF. 29-11-00-796-053</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Hydraulic System, MainSDR UIEA2022070700746Lockout · leakingDURING THE DEVELOPMENT OF THE TASK CARD HYDRAULIC POWER LEAK CHECK, RH WING, WAS FOUND LEAK EVIDENCE AT THE O/B AILERON LOCKOUT MECHANISM. LEAK TEST WAS PERFORMED ON O/B RH AILERON LOCKOUT MECHANISM AND NO LEAKS FOUND. TEST PERFORMED IAW 29-11-00-796-053, REVJul 13, 2022 · N1427A · Boeing 767306 · Hydraulic System, MainSDR UIEA2022070700747Spoiler · leakingDURING DEVELOPMENT OF TASK CARD HYDRAULIC POWER LEAK CHECK, RH WING, WAS FOUND LEAK EVIDENCE AT THE SPOILER NO. 9. LEAK TEST WAS PERFORMED ON THE RH WINGS, SPOILER ACTUATOR #9 AND NO EVIDENCE OF LEAKS FOUND. TEST REFERENCE AMM 29-11-00-786-053 REV 135</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Hydraulic System, MainSDR UIEA2022070700749Acoustic Panel · damagedLH INLET COWL INNER BARREL ACOUSTIC PANEL (LATERAL AND LOWER SEGMENT)(ENGINE # INLET COWL, INNER BARREL, AND ACOUSTIC PANELS WERE REPAIRED IAW SRM 54-15-01, REPAIR 3 & TRE6754160</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Nacelle/Pylon, Main FrameSDR UIEA2022070800759Actuator · leakingRH WING, INBOARD FLAP, OUTBOARD ACTUATOR, LEAK EVIDENCE(<P>LEAK TEST WAS PERFORMED ON RH INBOARD FLAP AND NO LEAKS FOUND. TEST PERFORMED IAW AMM 29-11-00-796-053 REV 125</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Hydraulic System, MainSDR UIEA2022071200761Acoustic Panel · damagedLH INLET COWL INNER BARREL ACOUSTIC PANEL (LATERAL AND LOWER SEGMENT)(ENGINE # INLET COWL, INNER BARREL, AND ACOUSTIC PANELS WERE REPAIRED IAW SRM 54-15-01, REPAIR 3 & TRE6754160</P>)Jul 13, 2022 · N1427A · Boeing 767306 · Nacelle/Pylon, Attach FittingsSDR UIEA2022032800243Tab · missingCA O2 MASK LEFT DOOR RETENTION TAB BROKEN AND MISSING.(<P>REMOVED AND REPLACED BOX ASSY, EQIP IAW AMM 35-11-51. OPS GOOD, LEAK CHECK GOOD.</P>)Mar 27, 2022 · N1427A · Boeing 767306 · Crew Oxygen SystemSDR UIEA2021111102392None · noneUPON TURNING ON FUEL PUMPS NOTED RT AFT PRESS AND RT AFT FUEL PUMP EICAS MESSAGE AND ASSOCIATED CIRCUIT BREAKER POPPED.(<P>PLACED ITEM ON DMI 156581 IAW MEL 28-22-01 MX ACTION C/W CB PULLED CAT C DUE DATE 21NOV21.</P> / <P> </P> / <P>REMOVED AND REPLACED RIGHTNov 11, 2021 · N1427A · Boeing 767306 · Fuel Boost PumpSDR UIEA2021110402346Switch · noneLH AFT FUEL PUMP OVERHEAD SWITH INOP / ( FUEL PUMP LOW PRESS LIGHTS, -200/-300 )(<P>TRANSFERRED TO MDDR 156172 PER DDG 28-42-01-01 CAT C DUE 13NOV21. C/W MAINTENANCE ACTION. PLACARD INSTALLED.</P> / <P>LOG PAGE 1373312: REMOVED AND REPLACED (L) AFT MAIN PUMPNov 3, 2021 · N1427A · Boeing 767306 · Fuel Quantity SensorSDR UIEA2021110302328None · noneATB RH BLEED OFF MSG DISPLAYED DURING CLIMB OUT. RH PACK OFF LIGHT ON.(<P>FOUND PRSOV TO PRECOOLER PNUEMATIC DUCT SLEEVE MISALIGNED, REPLACED DUCT PER AMM 36-11-01. REMOVED/REPLACED PRSOV PER AMM 36-11-09. REMOVED AND REPLACED FAN AIR TEMP SENSOR PER AMM 36-11Oct 30, 2021 · N1427A · Boeing 767306 · Pneumatic SystemSDR UIEA2021103102306Valve · none"R ENG BLD OVHT" ON DEPARTURE. PERFORMED QRH 2.27 & MESSAGE EXTINGUISHED.(<P>BITE CK'D AIR SUPPLY BITE MODULE PER FIM TASK 36-10. INDICATED RT FAN AIR VALVE INOP. REMOVED AND REPLACED RT ENG FAN AIR VALVE PER AMM 36-11-16</P>)Oct 29, 2021 · N1427A · Boeing 767306 · Pneumatic SystemSDR UIEA2021110102313Card · noneON CLIMB OUT AT AROUND 7000' THEN AGAIN THROUGH 17,000' EICAS MESSAGE R ENG BLEED OFF DISPLAYED. ACCOMPLISHED ASSOCIATED NON-NORMAL.(<P>PERFORMED AIR SUPPLY BITE CHECK IAW FIM 36-20 FT 804. NO FAULTS. SYS TEST OK. ACCOMPLISHED LEAK CHECK & GVI OF BLEED SYS IAWOct 28, 2021 · N1427A · Boeing 767306 · Pneumatic SystemSDR UIEA2021100602198None · noneAPU FAULT DURING START ATTEMPT AFTER LANDING(<P>APU STARTED 1ST ATTEMPT BY MX PER AMM 49-41-00/001. APU CHECKS OK.</P>)Oct 4, 2021 · N1427A · Boeing 767306 · Airborne Auxiliary Power Unit (APU) SystemSDR UIEA2021100402173Panel · noneCABIN ALT AUTO 1 EICAS MESSAGE DISPLAYED(<P>TRANSFERRED TO MDDR 154556 IAW MEL 21-31-01A, CAT 'A'.</P> / <P>04OCT21 - LP 1441429 - ITEM# 4 - ONT - REMOVED AND REPLACED CABIN PRESSURE SELECTOR IAW AMM 21-31-01. OPS CHECK GOOD. PERF CABIN PRESSURE CONTROLLER BITOct 3, 2021 · N1427A · Boeing 767306 · Cabin Pressure ControllerSDR UIEA2021092702137Charger · faultedAPU FAULT UPON ARRIVAL.(<P>PERFORMED APU BITE IAW FIM 49-11 FT 987. FOUND APU BATTERY CHARGER AT FAULT. R/R APU BATTERY CHARGER IAW AMM 24-31-05. OPS CHECK GOOD. </P>)Sep 25, 2021 · N1427A · Boeing 767306 · Airborne Auxiliary Power Unit (APU) SystemSDR UIEA2021092002061Gasket · damagedAPU REQ MEL PER ATLAS ENGINEERING DUE TO START FAULT.(<P>TRANSFERED TO MDDR 153687 PER DDG 49-11-01A CAT C DUE 27SEP21.</P> / <P>18SEP21 - LP 1440869 - ITEM 3 - SCK - C/W ECM# 2021P-337 STEPS 1-3 NO FAULTS FOUND AT THIS POINT ECM# 2021P-337 STEPS 4-7 REMAIN OPSep 17, 2021 · N1427A · Boeing 767306 · APU Cowling/ContainmentSDR UIEA2021091702041Ecu · faultyAPU FAULT 2 TIMES ON LANDING.(<P>PERFORMED APU BITE PROCEDURE REF AMM 49-61-05. FOUND MINIFLAG #34. RESET APU ECU AND STARTED APU ON FIRST ATTEMPT. APU OPS CHECK NORMAL AT THIS TIME.</P>)Sep 16, 2021 · N1427A · Boeing 767306 · APU ControlsSDR UIEA2021091502022Ignition Lead · faulty"APU FAULT" EICAS ON FIRST START AFTER LANDING. 2ND ATTEMPT OK.(<P>TRANSFERRED TO MDDR #153504 IAW MEL 49-11-01A CAT "C" DUE 24SEP21.</P> / <P>15SEP21 - LP 1397862 ITEM 4 - ONT - R/R APU EXCITER IAW AMM 49-41-03. OPS CHECK APU PER AMM 49-00-00. OPS CHECKS GOODSep 14, 2021 · N1427A · Boeing 767306 · APU Start/Ignition SystemSDR UIEA2021090901993Indicator · no indicationR START VALVE LIGHT INOP DURING ENG START(<P><SPAN>PERFORMED DRY MOTOR RUN OF RH ENG TWICE IAW AMM 71-00-00. OPS CHECK GOOD., RH START VALVE LIGHT OPS CHECK GOOD.Sep 8, 2021 · N1427A · Boeing 767306 · Engine Start Valves/ControlsSDR UIEA2021090701983Fault Message · false activationAPU FAULT EICAS MSG 1ST START ON GROUND @ TPA. STARTED 2ND ATTEMPT. RECURRANCE OF PREVIOUS LEGS.(<P>TRANSFERRED TO MDDR 153154 PER DDG 49-11-01A. CAT C. DUE 17SEP21 ZH 1707.</P> / <P>REF LOGPAGE 1386720 ITEM 4 RFD: C/W BITE AND OPS CK IAW 49-00-00. OPS CKS GOOSep 7, 2021 · N1427A · Boeing 767306 · APU Core EngineSDR UIEA2021090971977Indicator · faultedCOULD NOT PUT STANDBY ENG INDICATOR INTO TEST MODE(<P>REMOVED AND REPLACED STANDBY ENGINE INDICATOR ASSY IAW AMM 77-41-01. OPS CHECK GOOD AND BITE CHECK GOOD.Sep 6, 2021 · N1427A · Boeing 767306 · Engine Temperature Indicating SystemSDR UIEA2021090201941Radar · malfunctionedWEATHER RADAR DOESN'T PAINT WEATHER MULTIPLE THUNDERSTORM SYSEMS ACROSS THE US AFTER APPEARED ONSCREEN(<P>PERFORMED OPS TEST WXR LT & RT IAW AMM 34-43-00. OPS TEST GOOD AT THIS TIME.</P>)Sep 1, 2021 · N1427A · Boeing 767306 · Weather Radar SystemSDR UIEA2021082301851Control Valve · faultedR PACK TEMP EICAS MOMENTARILY DISPLAYED DURING DESCENT(<P>REMOVED AND REPLACED RH PACK TEMP CONTROL VALVE IAW AMM 21-61-12. OPS CHECK GOOD, LEAK CHECK GOOD.</P>)Aug 21, 2021 · N1427A · Boeing 767306 · Cabin Cooling SystemSDR UIEA2021082301852Warning Message · false activationAPU FAULT EICAS AFTER LANDING DURING FIRST APU START ATTEMPT(<P>PERFORMED BIT CHECK IAW FIM 49-11 FAULT TREE 987. OPS CHECK IAW AMM 49-11-00, OPS CHECK GOOD.</P>)Aug 21, 2021 · N1427A · Boeing 767306 · Central WarningSDR UIEA2021080401702Unknown · vibrationINFO ONLY, ON INITIAL CLIMB OUT RUGHT ENGINE VIB INDICATION CYCLED FROM FAN-LPT-N2 REPEATEDLY. NO LIMITATIONS EXCEEDED(<P><SPAN>NOTED BY MX. PER B767 AMM 77-31-00/701 DESCRIPTION AND OPERATION OF AIRBORNE VIBRATION MONITORING SYSTEM, SYSTEM OPERATION IS NORMALAug 3, 2021 · N1427A · Boeing 767306 · Engine (Turbine/Turboprop)SDR UIEA2021080201676Ignition Unit · inoperativeAPU FAULT ON ARRIVAL(<P>PERF APU BITE PER AMM 49-61-05, IGN UNIT LRU FAULT SHOWN, FOLLOWED FIM 49-11 FT 819. REMOVED AND REPLACED IGNITION UNIT IAW AMM 49-41-03, PERFORMED MULITIPLE APU START UPS. ALL ATTEMPTS SUCCESSFUL, NO FURTHER DEFECTS NOTED</P>)Jul 30, 2021 · N1427A · Boeing 767306 · APU Start/Ignition SystemSDR UIEA2021071501552Module · faultedR ENG BLEED VALVE WOULD NOT OPEN, EVEN AT 75% N2(<P>REMOVED AND REPLACED ENG PRESSURE REGULATING VALVE IAW AMM 36-11-18. S/N OFF - NSN P/N OFF-792755-15 - VALVE.</P> / <P>14JUL21 - 1390662 - ITEM# 5 - CVG - REMOVED AND REPLACED AIR SUPPLY BITE MODULE IAW AMM 3Jul 14, 2021 · N1427A · Boeing 767306 · Pneumatic Distribution SystemSDR UIEA2021070801487Valve · inoperativeAPU BLEED NOT SUPPLYING DUCT PRESSURE AND BLEED VALVE NOT INDICATING OPEN.FOUND GROUNDED SHIELD AT ECU, REPAIRED WIRING. REMOVED AND REPLACED APU BLEED AIR VALVE IAW AMM 36-11-00. OPS CK GOOD.Jul 8, 2021 · N1427A · Boeing 767306 · APU Bleed Air SystemSDR UIEA2021070801486Warning Message · false activationAPU BLEED VALVE EICAS ON BLOCK IN.(<P>CYCLED APU BLEED VALVE PER AMM 36-11-10. OPS CHECK GOOD AT THIS TIME.</P>)Jul 7, 2021 · N1427A · Boeing 767306 · APU Bleed Air SystemSDR UIEA2021070601473Valve · failedAPU PNEUMATICS INOP(<P>TRANSFERRED TO MDDR 149618 IAW MEL 49-11-01-01, CAT C.</P> / <P>LP 1361901 - ON A/C ARRIVAL WE ACTIVATED PNEUMATICS ON APU, WE HAD 30 PSI OF DUCT PRESSURE WITH PACKS OFF, WITH BOTH PACKS RUNNING WE HAVE 20-25 PSI OF DUCT PRESSURE, RAN AJul 3, 2021 · N1427A · Boeing 767306 · Pneumatic Distribution SystemSDR UIEA2021070101458Module · faultedAPU BLEED INOP ( AUXILIARY POWER UNIT, PNEUMATIC FUNCTION )(<P>TRANSFERRED TO MDDR 149488, DUE 10JUL21, CAT C, IAW ATLAS DDG 49-11-01-01. MX ACTION COMPLIED WITH.</P> / <P><SPAN>LP 1363567: REPLACED FLOW SENSING MODULE. PERFORMED ENGINE RUN. OPS CHECK GOOD IAWJun 30, 2021 · N1427A · Boeing 767306 · APU Bleed Air SystemSDR UIEA2021062101398Warning Message · false activationR PACK TEMP ADVISORY MESSAGE IN DESCENT PROX 10000 FT. CAME ON TWICE- EXTINGUISHING BOTH TIMES(<P>PACK RESET & BIT CHECK IAW FIM TASK 21-51- TF 844, OPS CHECK GOOD & BITE CHECK GOOD, NO ACTIVE MESSAGES</P>)Jun 19, 2021 · N1427A · Boeing 767306 · Cabin Cooling SystemSDR UIEA2021060701281Sensor · faultedAPU INOP(<P>TRANSFERRED TO MDDR # 148142 IAW MEL 49-11-01A CAT C DUE 16 JUN 21</P><P>CVG- 07 JUN- LP 1122138- ITEM 4- FOUND MINI FLAG 14, PT SENSOR ON BITE, CLEARED ECU, PERF OPS CHECK IAW AMM 49-11-00, OPS CK GOOD, NO FURTHER DEFECTS NOTED, CLEARED DMI 148142Jun 6, 2021 · N1427A · Boeing 767306 · APU Core EngineSDR UIEA2021052401171Generator · inoperativeAPU GENERATOR INOP WONT PICKUP POWER WHEN APU SELECTED.(<P>PERFORMED APU SYSTEM CK, APU GEN CHK GOOD. ACCOMPLISHED APU GEN OPS TEST IAW B767 AMM 24-21-00. NO DEFECTS NOTED, OPS TEST GOOD.</P>)May 24, 2021 · N1427A · Boeing 767306 · AC Generator-AlternatorSDR UIEA2021052401174Generator · inoperativeAPU GENERATOR NOT SUPPLYING POWER.(<P>REMOVED AND REPLACED APU GENERATOR IAW AMM 24-21-01, OPS CHECK GOOD. PER FIM 24-20 TASK 805. REMOVED AND REPLACED APU GCU IAW AMM 24-22-02 OPS CHECK GOOD. (GCU P/N OFF 734284F S/N OFF 2232)</P>)May 24, 2021 · N1427A · Boeing 767306 · AC Generator-AlternatorSDR UIEA2021052001159Oxygen Mask · inoperativeCAPT'S 02 MASK WILL NOT INFLATE, NOR FLOW ANY OXYGEN TO THE MASK. IT IS COMPLETELY DEAD. SWAPPED O2 STOWAGE MASK BOXES FROM FIRST OBSERVER'S TO CAPT'S. DEFERRED FIRST OBSERVER'S SEAT.(<P>REMOVED AND REPLACED CAPT'S O2 MASK PER AMM 35-11-51. NO HELP, REPLACED OMay 20, 2021 · N1427A · Boeing 767306 · Crew Oxygen SystemSDR UIEA2021051501134Warning Message · false activationSTATUS MSG CABIN ALT AUTO 1(<P>PERF CABIN PRESS CONT BITE IAW FIM 21-31 FT 803. MESSAGE CLEARED. NO FAULTS NOTED AT THIS TIME.</P>)May 15, 2021 · N1427A · Boeing 767306 · Cabin Pressure Control SystemSDR UIEA2021051201123Oil System · overservicedAPU SHUTDOWN PRIOR TO DISCONNECTING GPU(<P>TRANSFERRED TO MDDR 146280 IAW MEL 49-11-01A, CAT C.</P><P>LP 1481047: PERFORMED FIM 49-11 FAULT TREE 987 APU BITE. FOUND NO CURRENT FAULTS. INSPECTED APU AND FOUND OIL TO BE OVERSERVICED. TOOK EXCESS OIL OUT AND SERVMay 11, 2021 · N1427A · Boeing 767306 · APU Oil System
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