# Service difficulty reports: JASC 4997 A list on [JASC 4997](https://openairdocs.org/jasc/4997.md). Reports filed under 4997 · APU System Wiring, newest first. Page 1 of 5 · 226 reports - [SDR DALA2026052603157](https://openairdocs.org/sdr/DALA2026052603157.md): Wire · arced · May 21, 2026 · N824DN · Boeing 737932ER > APU STARTER GENERATOR T4 WIRE IS ARCHING AND MELTED THROUGH THE LEAD COVER. REMOVED AND REPLACED APU STARTER GENERATOR IAW B737 AMM 49-41-21. OPS TEST GOOD. (LOG 1606182 - AIRCRAFT WAS GROUNDED). - [SDR DALA2026051302986](https://openairdocs.org/sdr/DALA2026051302986.md): Terminal · damaged · May 12, 2026 · N887DN · Boeing 737924ER > ON THE GROUND WHILE ON APU GOT STRONG BURNING SMELL, LOST ELEC POWER. WE SHUT DOWN APU. NO SMOKE OR FIRE INDICATION. T/S FOUND APU TERMINAL DAMAGED. RECIRC FANS AND E/E COMPARTMENT AND CABINS GALLEY OVEN COFFEEMAKER AND LAV HEATERS ALL CHKS GOOD. RAN BOTH ENGI - [SDR SCNA20260223098](https://openairdocs.org/sdr/SCNA20260223098.md): Elec Connector · sparks · Feb 22, 2026 · N804SY · Boeing 7378Q8 > WHEN TROUBLESHOOTING INOP APU, DURING VOLTAGE CHECK OF FIM 49-40 TASK 816 THE WIRE LEAD SPARKED ON CONTACT WITH ELECTRICAL CONNECTOR D11114C SOCKET 55. PART OF THE LEAD FUSED TO THE INSIDE OF THE SOCKET. FORWARD LH FWD CARGO BULKHEAD REMOVED AS WELL AS THE LO - [SDR 2025FA0000783](https://openairdocs.org/sdr/2025FA0000783.md): Wire Harness · mismanufactured · Nov 25, 2025 · N221RW · Gulstm GVIIG600 > WHILE CARRYING OUT WIRING CHKS BETWEEN APU OIL QTY TRANSMITTER & FLUID QTY INDICATOR, IT WAS NOTED THAT TWO WIRES (H347-22-6(WHT) & 347-22-6 (BLU)) HAVE BEEN INCORRECTLY PINNED AT FQI CONNECTOR (082M1P1). WIRE H347-22-6(WHT) IS LOCATED IN PIN 14 INSTEAD OF PIN - [SDR UIEA2025021200132](https://openairdocs.org/sdr/UIEA2025021200132.md): Wire Harness · damaged · Feb 12, 2025 · N649GT · Boeing 767375 > AIR TURN BACK DUE TO APU SHUTDOWN IN FLIGHT. LEFT GENERATOR ON MEL SO APU IS REQUIRED. APU RESTARTED ON 3RD ATTEMPT.(

PER ENGINEERING AND MANAGEMENT REQUEST, R/R APU HARNESS WIRE PN: W020-212R-24 IAW WDM 49-14-11-1 AND SWPM 20-25-00 AND SWPM 20-60-00. DUE TO - [SDR HALA20241202345](https://openairdocs.org/sdr/HALA20241202345.md): Connector · damaged · Dec 1, 2024 · N208HA · Airbus A321271N > ETOPS - APU FAULT ON TAXI OUT BTB. ITEM ALREADY ON DMI, REPLACED AND RESECURED PINS/ JUMP CONNECTORS PER AMM 49-16-00-003-A OPS CHK OF APU GOOD OK TO REMAIN ON DMI. - [SDR NACA2024080500001](https://openairdocs.org/sdr/NACA2024080500001.md): Connector · dirty · Aug 5, 2024 · N379CX · Boeing 767323 > APU FAULT, ATTEMPTED THREE STARTS. REMOVED ECU, CLEANED CONNECTOR, REINSTALLED ECU OPS NORMAL IAW AMM 49-11-00 - [SDR SWAA2024040570941](https://openairdocs.org/sdr/SWAA2024040570941.md): Module · arced · Apr 4, 2024 · N7750A · Boeing 7377BD > FOR 2 OR 3 MIN ON DECENT AN ELECTRICAL ARCING SOUND EMINATED FROM THE OVERHEAD PANEL IN THE VICINITY OF THE FUEL & BUS TRANSFER PANELS. NO STATIC ELECTRICITY NO STATIC AND VISIBLE ON WINDOWS. OZONE SMELL NO ACCOMPANY SOUND<[01] C/W SMOKE/FUMES IN CABIN CONDITI - [SDR NACA2023110900002](https://openairdocs.org/sdr/NACA2023110900002.md): Unknown · unknown · Nov 9, 2023 · N566NC · Boeing 7673BG > FOUND UPPER APU BONDING WIRE MISSING 2 EA. INSTALLED APU UPPER BONDING WIRES 2 EA IAW AMM 49-11-01 - [SDR DXTA2021123154540](https://openairdocs.org/sdr/DXTA2021123154540.md): Apu · leaking · Dec 31, 2021 · N767QS · Bombdr BD1001A10 > WHEN APU IS OPERATING THERE IS AN OIL SMELL IN CABIN. ON APU DRAIN THERE IS A BLACK OILY STREAK. FOUND OIL STREAK TO BE CAUSED BY OIL DRIPS COMING FROM GANG DRAIN FCU MOUNT PAD LOCATION & EJECTOR OVERBOARD EXHAUST DUCT DRAIN. REMOVED PAU INTAKE PLENUM DRAIN - [SDR AALA202112127725](https://openairdocs.org/sdr/AALA202112127725.md): Wire Harness · faulty · Dec 8, 2021 · N976NN · Boeing 737* > AIRCRAFT WAS GROUNDED: DURING TAKE OFF ROLL, APU FAULT AND MASTER CAUTION ILLUMINATED. REJECTED TAKEOFF AT APPROXIMATELY 60 KNOTS. RETURNED TO GATE. **SUPPLEMENTAL REPORT FOR AALA202112097725: REPLACED APU WIRE HARNESS PER AMM 49-11-01.** (CLOSED) - [SDR 9JLA2021112219152](https://openairdocs.org/sdr/9JLA2021112219152.md): None · none · Nov 17, 2021 · N817BZ · Cessna 560XL > THE FLIGHT CREW REPORTED THAT THE APU DOES NOT RESTART AFTER IT WAS SHUTDOWN. UNTIL MAIN POWER IS TURNED OFF. THE MAINTENANCE VENDOR COMPLETED EXTENSIVE TROUBLESHOOTING AND INSTALLED A WIRE FROM THE APU PCB DISCONNECT (35 JF010) TO THE RIGHT FORWARD PRESSURE B - [SDR 9JLA2021110234478](https://openairdocs.org/sdr/9JLA2021110234478.md): Circuit Breaker · broken · Oct 26, 2021 · N74HT · Lear 60LEAR > THE MAINTENANCE TECH REPORTED THAT DURING TROUBLESHOOTING OF APU SYSTEM IT WAS DISCOVERED THAT AN APU CIRCUIT BREAKER ON THE APU START PANEL WAS FOUND TO BE BROKEN AND WOULD NOT LATCH AND RESET. THE DEFECTIVE CIRCUIT BREAKER WAS REPLACED WITH A NEW BREAKER. OP - [SDR P5CA2021080900293](https://openairdocs.org/sdr/P5CA2021080900293.md): Wire Harness · damaged · Aug 6, 2021 · N644GT · Boeing 7673JHF > FOUND UPPER EGT HARNESS DAMAGE AT #1 ENG(

IAW AMM 77-21-02-004-012-H00 AND 77-21-02-404-016-H00 REV 132 REMOVED AND REPLACE EGT HARNESS. IAW AMM 77-21-00-715-012-H00 REV 132 PERFORMED TEST, TEST PASSED

) - [SDR P5CA2021080900294](https://openairdocs.org/sdr/P5CA2021080900294.md): Wire Harness · damaged · Aug 6, 2021 · N644GT · Boeing 7673JHF > FOUND UPPER EGT HARNESS DAMAGE AT #2 ENG(

IAW AMM 77-21-02-004-012-H00 AND 77-21-02-404-016-H00 REV 132 REMOVED AND REPLACED EGT HARNESS. IAW AMM -77-21-00-715-012-H00 REV 132 PERFORMED TEST, TEST PASSED

) - [SDR P5CA2021080900296](https://openairdocs.org/sdr/P5CA2021080900296.md): Wire Harness · damaged · Aug 6, 2021 · N644GT · Boeing 7673JHF > FOUND LOWER EGT HARNESS DAMAGE AT #2 ENG(

IAW AMM 77-21-02-004-012-H00 AND 77-21-404-016-H00 REV 132 REMOVED AND REPLACED HARNESS. IAW AMM 77-21-00-715-012-H00 REV 132. PERFORMED TEST, TEST PASSED

) - [SDR UIEA2021072801640](https://openairdocs.org/sdr/UIEA2021072801640.md): Cap · leaking · Jul 27, 2021 · N1321A · Boeing 767306 > APU FAULT INDICATED ON START ATTEMPT. STATUS SCREEN SHOWS ADD OIL(

SERVICED APU OIL IAW 49-27-00. SUSPECT OIL LEAKING PAST OIL FILL CAP. REMOVED AND REPLACE OIL FILL CAP IAW AMM 20-11-00. OPS CKS GOOD.

) - [SDR UIEA2021071501555](https://openairdocs.org/sdr/UIEA2021071501555.md): Wire Harness · damaged · Jul 13, 2021 · N649GT · Boeing 767375 > APU RELIABILITY COLD SOAK START UNSUCCESSFUL, 1ST ATTEMPT - SAT - 53 - FL400 MAX RPM 45% / 2ND ATTEMPT - SAT - 52 - FL400 MAX RPM 20% / 3RD ATTEMPT - SAT - 52 - FL400 MAX RPM 22%.(

NOTED BY MX. APU COLD SOAK CLEARED DUE TO APU INOP.

/

13JUL21 - LP - [SDR ASAA2021070975308](https://openairdocs.org/sdr/ASAA2021070975308.md): Wire Harness · faulted · Jul 7, 2021 · N563AS · Boeing 737890 > APU HAS HISTORY OF AUTO SHUTDOWN WITH NO FLAME AND SPEED SENSOR FAULTS. REMOVE AND REPLACE APU WIRE HARNESS AND SPEED SENSOR. ETOPS SIGNIFICANT SYSTEM. ACCOMPLISHMENT OF LISTED MAINTENANCE TASKS WILL AFFECT APU ON DEMAND IN-FLIGHT START CAPABILITY. MEL 49-99A - [SDR ASAA2021070735299](https://openairdocs.org/sdr/ASAA2021070735299.md): Connector · dirty · Jul 7, 2021 · N563AS · Boeing 737890 > APU SHUTDOWN AUTOMATICALLY WITH ASSOCIATED FAULT LIGHT DURING TAXI INTO GATE AFTER LANDING. GROUNDED - YES. PERFORMED B737-800 FIM 49-40 TASK 802 AND 49-60 TASK 801, RESOLVED FAULT CODE 49-61262 PERFORMED FIM 49-60 TASK 817 INSPECTED APU WIRE HARNESS. REMOVED - [SDR UIEA2021062101395](https://openairdocs.org/sdr/UIEA2021062101395.md): Circuit Breaker · tripped · Jun 20, 2021 · N1381A · Boeing 767316 > APU INOP(

TRANSFERRED TO MDDR # 148936 IAW ATLAS MEL 49-15-01-01B. NO MX ACTION REQ. PLACARDS INSTALLED. RC 1534Z.

/

STL MX, 21JUN LP 1305947, ITEM M7: TROUBLESHOT APU PER B767 FIM 49-11 FAULT TREE 987. FOUND BREAKER POPPED. RESET BREAKER, OPS CHECK P - [SDR UIEA2021060901303](https://openairdocs.org/sdr/UIEA2021060901303.md): Connector · damaged · Jun 8, 2021 · N1399A · Boeing 767306 > APU AUTO SHUTDOWN APPROX 30 MIN AFTER START, APU FAULT MESSAGE. TROUBLESHOT PER B767 FIM 49-11 TREE 909 GEN FILTER MSG ON ECU - APU INOP - ITEM PLACED ON DMI 148253 IAW MEL 49-11-01A, CAT C, DUE 19 JUN21. C/W AP-20109, PERFORMED AMM 49-20-00 GVI TASK NO FAUL - [SDR UIEA2021060601275](https://openairdocs.org/sdr/UIEA2021060601275.md): Pin · recessed · Jun 6, 2021 · N1399A · Boeing 767306 > APU AUTO SHUT DOWN.(

PERFORMED APU CONTROL UNIT BITE TEST., FAULT CODE GEN FILTER ON BITE, REQUIRES FURTHER T/S. LOG 1485729 ITEM #9: FOUND CONNECTOR P20 PIN 2 RECESSED, PERFORMED FIM 49-11 F/T 998 FOR APU AUTO SHUT DOWN, FOUND RECESSED PIN ON CONNECTOR P20 - [SDR 9JLA2021060419001](https://openairdocs.org/sdr/9JLA2021060419001.md): Wire · broken · May 21, 2021 · N602JC · Beech 400A > THE FLIGHT CREW REPORTED THAT IN-FLIGHT THE RIGHT ELECTRONIC FUEL CONTROL (EFC) ANNUNCIATOR ILLUMINATED. THEY RESET IT PER THE CHECKLIST, BUT WOULD NOT RESET. RIGHT N1 HAD ASSOCIATED DROP. THE MAINTENANCE VENDOR TROUBLESHOT AND FOUND THE RIGHT ENGINE T-O PROBE - [SDR ASAA2021042034672](https://openairdocs.org/sdr/ASAA2021042034672.md): Connector · loose · Apr 20, 2021 · N469AS · Boeing 737990ER > APU WON'T START. GROUNDED - YES. R&R APU INLET TEMP SENSOR REF B737-900 AMM 49-61-31-000-801 AND 49-61-31-400-801. STARTED APU NO START NO HELP. ACCOMP APU BITE PROCEDURE FAULTS SHOWED NO FAILURES FAULT HISTORY SHOWED 5 PAGES FAULT MSG 49-15004 INLET DOOR SHUT - [SDR UIEA2021030800491](https://openairdocs.org/sdr/UIEA2021030800491.md): Connector · damaged · Mar 7, 2021 · N645GT · Boeing 767324 > APU INOP(

DEFER MEL 49-11-01B, MDDR 143512, CAT B, 10MAR21. PLAC INSTALLED.

LP 1273725: T/S IAW WITH FIM 49-11-993 AND WDM 49-14-11. FOUND PUSHED BACK PIN #2 AT J4 ON IGNITOR BOX. OPS CK C/W 49-00-00. THIS CLEARS MDDR 143512. PLAC REMOVED.

) - [SDR UIEA2021020200193](https://openairdocs.org/sdr/UIEA2021020200193.md): Connector · damaged · Feb 2, 2021 · N1489A · Boeing 76731K > APU INOPERATIVE/(AUXILIARY POWER UNIT (APU), ER OPERATIONS NOT ALLOWED (NOTIFY DISPATCH) R60. TRANSFERRED TO DMI 141801, IAW MEL 49-11-01A, CAT C. REPLACED PIN NR 33 AT CONNECTOR D4111, PER B767 WDM 49-14-11 AND SWPM 20-61-11. OPERATIONS CHECK GOOD, PER B76 - [SDR HNAA2020121400361](https://openairdocs.org/sdr/HNAA2020121400361.md): Contactor · burned · Dec 13, 2020 · N638AE · Emb EMB145LR > PDIS 638 49-10 2346991 13DEC20 MDT CLOSE. WHEN PILOT TURNED ON HIS APU HE HAD SHED BUS 1 AND 2 OFF LINE FOLLOWED BY APU GEN OFF BUSS AND ELECTRICAL BURNING SMELL. FACT 13DEC20 23:10 MDT. APU LINE CONTACTOR SHOWS SIGNS OF BURN DAMAGE. R & R APU LINE CONTACT - [SDR P5CA2020112600388](https://openairdocs.org/sdr/P5CA2020112600388.md): Connector · shorted · Nov 26, 2020 · N642GT · Boeing 7673Y0 > APU NO DUCT PSI. TROUBLESHOT WIRING FROM PLUG D4100J PINS 10, 11 TO PLUG D4098P PINS 4, 5. FOUND SHORT TO SHIELD. SPLICED NEW SHIELDS AT PLUGS D 4100J PINS 11 AND PLUG D4098 PINS 5, IAW WDM DRAWING NR 47094MM801 AND SWPM 20-25-11. ALL OPERATIONS CHECKS G - [SDR DXTA202009254129](https://openairdocs.org/sdr/DXTA202009254129.md): Wire · damaged · Sep 25, 2020 · N388QS · Cessna 680A > DURING AND AFTER APU START UP IN FLIGHT WITH APU BLEED OFF WE HAD AN ELECTRICAL SMOKE SMELL COMING FROM THE COCKPIT GASPERS. AFTER SHUTDOWN OF THE APU THE SMELL WENT AWAY. SIGN OFF. UPON INSPECTION FOUND FOUR WIRES EXHIBITING A BURNED/CHAFED APPEARANCE. D - [SDR FDEA202009162228](https://openairdocs.org/sdr/FDEA202009162228.md): Ground Stud · melted · Sep 16, 2020 · N169FE · Boeing 7673S2F > WHILE COMPLYING WITH EA H-4910-F0356148 REVISION A PART 1 DATED SEP 11, 2020 STEP 3, FOUND APU GROUND GD1300-DC ARCHED AND PARTIALY MELTED. REPLACED BRACKET AND CHECKED GROUNDS GD01298-AC AND GD-1300-DC. REPAIRED LEADS AND OPS CHECKED APU. ALL WORK DONE IAW - [SDR ASAA2020082093043](https://openairdocs.org/sdr/ASAA2020082093043.md): Connector · loose · Aug 19, 2020 · N442AS · Boeing 737990ER > APU FAULT LIGHT ON AFTER ATTEMPTED RESTART. GROUNDED - YES. VERIFIED APU INOP, FAULT CODE 49-15217 (INLET DOOR SWITCH POWER SHOWS HIGH CURRENT), REF B737-900 FIM 49-10 TASK 809. APU BITE SHOWS NO CURRENT FAULTS. FOUND BACKSHELL LOOSE AND WIRE W4726-1003-20 - [SDR ASAA2020081073000](https://openairdocs.org/sdr/ASAA2020081073000.md): Wire Harness · faulty · Aug 7, 2020 · N531AS · Boeing 737890 > NR 1 ENGINE WOULD NOT START, NO N2 ROTATION. GROUNDED - YES. REPLACED THE APU ENGINE WIRE HARNESS IAW AMM 49-11-01/401. OPS TESTED GOOD. STARTED THE NR 1 ENG WITH APU BLEED. NR 1 ENGINE STARTED NORMALLY. NO DEFECTS NOTED. - [SDR ASAA2020073172956](https://openairdocs.org/sdr/ASAA2020073172956.md): Connector · not seated · Jul 27, 2020 · N536AS · Boeing 737890 > APU FAILED TO START AFTER LANDING FAULT LIGHT ILLUMINATED FOR 4 MINUTES AND THEN WENT OUT. RAN QRH AND DID NOT TRY A RESTART. GROUNDED - YES. INITIAL EVAL OF APU CONFIRMED NO START. ACCOMPLISHED B737-800 FIM 49-32-TASK 805. ALL RING OUTS GOOD. DURING GVI OF AP - [SDR UIEA2020061401284](https://openairdocs.org/sdr/UIEA2020061401284.md): Wire Harness · failed · Jun 14, 2020 · N1499A · Boeing 767328 > APU BLEED INOPERATIVE. REMOVED AND REPLACED APU WIRE HARNESS IAW SWPM 20-10-04. CHECK OF APU PNEU GOOD IAW AMM 49-52-00. - [SDR UIEA2020061091247](https://openairdocs.org/sdr/UIEA2020061091247.md): Wire · broken · Jun 6, 2020 · N496MC · Boeing 74747UF > FAULT HISTORY REPORT FOUND APU IGNITION UNIT STUCK ENERGIZED CMC MSG: 49078. IAW FIM 49-11 TASK 879 REV 98 AND WDM 49-11-16 REV 48 AND SSM 49-11-01 REV 48 PERFORMED WIRE CONTINUITY AND INSULATION CHECK. FOUND WIRE W7242-008-20 BROKEN. IAW SWPM 20-30-11 REV 13 - [SDR UIEA2020052701119](https://openairdocs.org/sdr/UIEA2020052701119.md): Wire · shorted · May 22, 2020 · N1373A · Boeing 76731K > APU FAULT AND APU WILL NOT START. PERFORMED IGV PUSH PULL IAW FIM 49-11 FT 718 5 LBS, WITHIN LIMITS. PERFORMED WIRE CHECKS PER WDM 49-14-11 PINS A1 AND A2 BOTH ON D408B ARE SHORTED TO SHEILD J9 AND EACH OTHER. FOUND SPLICES SHORTED TO SHIELD AND SPLICES SM12 A - [SDR UIEA2020052001091](https://openairdocs.org/sdr/UIEA2020052001091.md): Connector · dirty · May 20, 2020 · N640GT · Boeing 7673S1 > APU FAULT, NO START(

TRANSFERRED TO MDDR 128562 IAW MEL 49-11-01B, CAT 'B'.

LOG PAGE 1199838: PERFORMED APU BITE PROCEDURES IAW FIM 49-11 FT 958, SH1, BLK1, SH2, BLK2,3, SH3, BLK4,25. NO FAULTS NOTED. REMOVED APU ECU, CLEANED AND INSPECTED CONNECTORS. - [SDR UIEA2020042700838](https://openairdocs.org/sdr/UIEA2020042700838.md): Connector · not seated · Apr 25, 2020 · N1321A · Boeing 767306 > APU OIL QTY INDICATION INOP. RE-SEATED CONNECTOR D4024. OPS CHKS GOOD. CLOSED MDDR 127547. - [SDR UIEA2020041700762](https://openairdocs.org/sdr/UIEA2020041700762.md): Connector · dirty · Apr 15, 2020 · N1427A · Boeing 767306 > APU WILL NOT START, 3 ATTEMPTS.(

TRANSFER TO MDDR 127112 PER MEL 49-11-01A CAT C DUE 25APR20. PLACARD INSTALLED. SD @21:42Z

17APR: LP 1150290, ITEM M5: PERF APU BITE IAW FIM 49-11 FT 987. FOUND MINI FLAG 34 & LRU FAULT. A/C START CIRCUIT PERF FIM 49-11 - [SDR AALA202004069016](https://openairdocs.org/sdr/AALA202004069016.md): Feeder Cable · burned · Apr 4, 2020 · N956NN · Boeing 737823 > AIRCRAFT WAS GROUNDED: FLIGHT REPORTED STRONG ODOR IN CABIN. APU WAS RUNNING. SHUT DOWN APU. FOUND APU GENERATOR T1 FEEDER CABLE WIRE BURNT AT GENERATOR. REPLACED CABLE. RAN ENGINE. NO ODOR NOTED. AC OK FOR SERVICE. SUPPLEMENTAL ACTION SECT 4: INSPECTED FEED - [SDR ASAA2020022413247](https://openairdocs.org/sdr/ASAA2020022413247.md): Wire Harness · failed · Feb 21, 2020 · N597AS · Boeing 737890 > FAULT LIGHT ILLUMINATED DURING APU START. GROUNDED - YES. ACCOMPLISHED APU BITE REF B737-800 FIM 49-60 TASK 810 FOUND FAULT 49-72104 DATA MODULE CIRCUIT FAILURE AND 49-41011 NO FLAME SHUTDOWN. ACCOMPLISHED GVI OF APU WIRE HARNESS REF FIM 49-70 TASK 807, NO DEF - [SDR ASAA2020021827199](https://openairdocs.org/sdr/ASAA2020021827199.md): Wire Harness · failed · Jan 27, 2020 · N560AS · Boeing 737890 > APU CT5ATP EGT HAS SHIFTED ABOVE THE 593 DEGREE THRESHOLD AND REMAINS ABOVE THE 605 THRESHOLD. GROUNDED - YES. REPLACED BRANCHED APU HARNESS AND PERFORMED OPS CHECKS; CHECKS GOOD ON CARD #G1350537. PERFORMED WIRING RESISTANCE CHECKS IAW B737-800 FIM 49-70 TAS - [SDR UIEA2019091605509](https://openairdocs.org/sdr/UIEA2019091605509.md): Connector · dirty · Sep 14, 2019 · N662GT · Boeing 76731A > APU BLEED VALVE WOULD NOT OPEN FOR ENGINE START. CLEANED CONNECTOR. OPS CHECKED VALVE PER AMM 49-53-00, OPS CHECK GOOD. - [SDR AALA201909129002](https://openairdocs.org/sdr/AALA201909129002.md): Terminal · burned · Sep 10, 2019 · N128AN · Airbus A321231 > AIRCRAFT WAS GROUNDED: PILOT REPORTS APU WONT START. MAINTENANCE FOUND POSITIVE CABLE AT APU STARTER BURNT OFF. PULLED CB L42 AND L41 ON PANEL 121VU FOR SAFETY. REPLACED WIRE TERMINALS TO APU STARTER, REPLACED APU STARTER IAW AMM 49-42-51. CONNECTED AND TORQUE - [SDR QXEA2019081900319](https://openairdocs.org/sdr/QXEA2019081900319.md): Wire · burned · Aug 19, 2019 · N412QX · Bombdr DHC8402 > ON PREFLIGHT FO NOTICED A BURN WIRE INSIDE THE NOSE COMPARTMENT. THE IS ON THE TOP RIGHT SIDE OF THE BOX THAT HAS ALL THE CIRCUIT BREAKERS FACING FORWARD. APU PLACED ON MEL. FERRIED AIRCRAFT FOR REPAIRS. AIRCRAFT CURRENTLY OUT OF SERVICE. - [SDR CA191021022](https://openairdocs.org/sdr/CA191021022.md): Wire · burned · Jul 26, 2019 · Cndair CL6002B19 > (CAN) MAINTENANCE PERSONNEL FOUND EVIDENCE OF BURNED WIRES IN JB-5. THESE BURNED WIRES WERE DISCOVERED BY MAINTENANCE WHILE CARRYING OUT INSTRUCTIONS FROM TECH SERVICES VIA A JOB CARD. R/R RELAY K15PA, APU BATT CHG MSG NO LONGER PRESENT AFTER JB5 AND AIRFRAME - [SDR HALA2019072300366](https://openairdocs.org/sdr/HALA2019072300366.md): Connector · dirty · Jul 23, 2019 · N370HA · Airbus A330243 > ETOPS / APU AUTOSHUT DOWN. FOUND FUEL TRIM TANK INLET VALVE INOP PARTIAL OPEN. INSPECTED WIRING ON BACKSHELL, CLEANED REINSTALLED CONNECTOR VLV OPERATION/INDICATION CK'S NORMAL. - [SDR AALA201907059022](https://openairdocs.org/sdr/AALA201907059022.md): Electrical Sys · fire · Jul 4, 2019 · N650AW · Airbus A320232 > AIRCRAFT WAS GROUNDED: DUE TO ELECTRICAL FIRE ON APU START DISCHARGED APU FIRE BOTTLE. REMOVED AND REPLACED APU FIRE EXTINGUISHING BOTTLE (11WF) IAW AMM 26-22-41-0401. OPS TEST NORMAL. ALSO INSPECTED APU AND APU COMPARTMENT IAW AMM 49-00-00-200-001-A. NO DEF - [SDR ASAA2019062329827](https://openairdocs.org/sdr/ASAA2019062329827.md): Converter · failed · Jun 23, 2019 · N585AS · Boeing 737890 > APU GEN FAILED DURING PUSHBACK. GROUNDED - YES. REMOVED AND REPLACED APU STARTER GENERATOR IAW AMM 49-41-21. COMPLIED WITH FIM 24-21 TASK 820. FOUND BAD START CONVERTER UNIT. REMOVED AND REPLACED START CONVERTER UNIT AND OPS CHECK GOOD IAW AMM 49-41-61 APU BI Next page: https://openairdocs.org/jasc/4997/reports.md?page=2 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql 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 jasc_code = '4997' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/jasc/4997/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.