# Service difficulty reports: JASC 2420

A list on [JASC 2420](https://openairdocs.org/jasc/2420.md).

Reports filed under 2420 · AC Generation System, newest first.

Page 1 of 27 · 1,302 reports

- [SDR COEA2026100802921](https://openairdocs.org/sdr/COEA2026100802921.md): Vsi · failed · Oct 7, 2026 · N921FX · Aerosp ATR42300
  > FLIGHT 7275 ICT-AFW DISCREPANCY: DUAL AC BUS FAILURE IN FLIGHT. CREW EXECUTED THE EMERGENCY CHECKLIST, RESTORING POWER TO THE FO'S SIDE. THE CAPTAIN'S SIDE REMAINED INOPERATIVE. THE AIRCRAFT LANDED SAFELY IN AFW. CORRECTIVE ACTION: MAINTENANCE REPLACED THE C
- [SDR 2026FA0000797](https://openairdocs.org/sdr/2026FA0000797.md): Attach Bracket · cracked · Sep 30, 2026 · N644CS · Cessna T206H
  > ALTERNATOR ATTACH BRACKET P/N: 07A22214 FOUND TO BE CRACKED COMPLETELY THROUGH AT THE AFT ATTACH BOLT DURING THE 1ST 100 HOUR INSPECTION OF THE AIRCRAFT.
- [SDR AALA202607146993](https://openairdocs.org/sdr/AALA202607146993.md): Control Panel · faulted · Jul 13, 2026 · N835AN · Boeing 7879
  > AIRCRAFT WAS GROUNDED: DURING IN FLIGHT APU START BATTERY SWITCH -OFF- LIGHT ILLUMINATED AND STAYED ILLUMINATED. DECESION MADE TO RETURN TO DFW. MAINTENANCE (REF TSI 0144388) REPLACED ELECTRICAL CONTROL PANEL IAW AMM 24-22-01.
- [SDR CALA2026022414046](https://openairdocs.org/sdr/CALA2026022414046.md): Idg · faulted · Feb 23, 2026 · N67134 · Boeing 757224
  > RT AC BUSS OFF, FIGHT CREW REPORTED BUSS DROPPED OFF, CABIN WENT DARK AT TIME OF FAILURE AND DID WAS NOT PICKED UP. T/S IAW WDM 71-51-22-1 AND SSM 24-23-02. CHECKED WIRING FROM RT ENG GCU D2070B TO RT ENG IDG D1396P. ALL WIRING CHECKED GOOD. CHECKED RT ENG I
- [SDR DXTA2025093005135](https://openairdocs.org/sdr/DXTA2025093005135.md): Relay · faulted · Sep 28, 2025 · N234QS · Cndair CL6002B16
  > AC ESS BUS COMES ON AND OFF DURING FLIGHT. WITH EMER POWER SWITCH IN ARM THE EMER LIGHTS WILL ALSO THEREFORE COME ON WHEN THE AC ESS BUS COMES ON TOO AND IT GOES OFF AS THE AC ESS BUS GOES OFF. REMOVED AND REPLACED AC ESS BUS SENSE RELAY KIXD IAW CL-650 AMM
- [SDR DALA2025052103929](https://openairdocs.org/sdr/DALA2025052103929.md): Tru · failed · May 20, 2025 · N690DL · Boeing 757232
  > SHIP 0690 -ATB/DE- DUE TO RIGHT AC BUS FAIL. CORRECTIVE ACTION: REPLACED TRANSFORMER RECTIFIER UNIT AND RIGHT GENERATOR CONTROL UNIT.
- [SDR CALA2025032103072](https://openairdocs.org/sdr/CALA2025032103072.md): Idg · low · Mar 19, 2025 · N76010 · Boeing 777224
  > ELEC GEN OFF L EICAS ADVISORY LEFT GENERATOR CONTROL BREAKER (GCB) OPEN OR GENERATOR CONTROL S WITCH OFF AND ENGINE NOT SHUT DOWN. FIM TASK REF: FIM TASK REFERENCE NOT FOUND CMC MSG# 2431631 FLIGHT STATUS: I INTERMITTENCE CODE: M PH: CRUISE NARRATIVE: GENERA
- [SDR DXTA2024082700323](https://openairdocs.org/sdr/DXTA2024082700323.md): Unknown · noise · Aug 24, 2024 · N771QS · Bombdr BD1001A10
  > WHILE CLIMBING THROUGH APPROX FL310, A LOUD REVERBERATING/THUMPING NOISE WITH CRACKLING STATIC NOISE BEGAN EMANATING FROM RT FWD CABIN INTERIOR SIDEWALL. ALSO A VIBRATION & WARMTH COULD BE FELT ALONG INTERIOR WALL. DIVERTED TO KBIL. NOISE CONTINUED AFTER ENG
- [SDR FDEA202404300523](https://openairdocs.org/sdr/FDEA202404300523.md): Gcu · failed · Apr 30, 2024 · N522FE · Doug MD11F
  > ON ARRIVAL RECEIVED LEVEL 1 BUS AC 3 OFF. WORKING CHECKLIST WITH OTHER ASSOCIATED ALERTS. EMERGENCY DECLARED. NO REFERENCE REQUIRED, CHECKED EPCU CURRENT FAULTS & FOUND AC BUSS-3 SENSOR RELAY INTERFACE SAME FAULT LISTED IN LAST LEG OF HISTORY. COMPLIED WI
- [SDR AALA202403084994](https://openairdocs.org/sdr/AALA202403084994.md): Transformer · failed · Mar 6, 2024 · N118US · Airbus A320214
  > AIRCRAFT WAS GROUNDED: AT CRUISE, GENERATOR 1 FAILED. ASSOCIATED AC1 BUS FAULT RESULTED IN APU BEING UNABLE TO POWER LEFT SIDE. DOWN TO SINGLE GENERATOR POWERING AIRCRAFT (APU ON, BUT NOT CONNECTED), DECLARED EMERGENCY AND LANDED IN CLT. **ORIGINAL REPORT FOR
- [SDR EGYF20240218001](https://openairdocs.org/sdr/EGYF20240218001.md): Idg · wrong part · Feb 18, 2024 · Airbus A330*
  > THE A330 IDG PN: 752168B, SN: AAAD001484 HAS EXPERIENCED A REPEATED FAULT WITH CURRENT TRANSFORMER. THE UNIT WAS REMOVED FROM GCF ON 15. NOV.2020 AND SENT TO GLOBAL (GLOBAL AIR SERVICES LLC 14075 SW 143 CT UNIT # 4) MIAMI, FL 33186FOR REPAIR THEN RECEIVED SE
- [SDR ASAA2024020347677](https://openairdocs.org/sdr/ASAA2024020347677.md): Pcu · faulty · Feb 3, 2024 · N625AS · Boeing 737790
  > WHILE FLYING WITH MEL 24-1B WITH #1 GEN INOP (SEE 60726816) AND DESCENDING THROUGH FL 250 THE APU GENERATOR WENT OFF LINE WITH 0 VOLTS 0 FREQS. AT APPROXIMATLLY FL 200 THE #2 GE WENT OFFLINE FOR ABOUT 45 SECONDS. WE WERE ABLE TO RESET @3 GEN WHICH CAME BACK ON
- [SDR AALA202312247902](https://openairdocs.org/sdr/AALA202312247902.md): Seal · leaking · Dec 21, 2023 · N524UW · Airbus A320*
  > AIRCRAFT WAS GROUNDED: #2 #4 FLIGHT ATTENDANTS REPORTED DIRTY SOCK ODOR APPROX 10,000VFOR ABOUT 20 MINUTES ODOR SLOWLY DISAPPATED. MAINTENNCED FOUND GENERATOR DRAIN SEAL LEAKING REPLAXCED IAW AMM 24-23-51.
- [SDR ASAA2023110245976](https://openairdocs.org/sdr/ASAA2023110245976.md): Contactor · faulty · Nov 2, 2023 · N924AK · Boeing 7379
  > #1 ENGINE GEN TRIPPED DUTING TAXI NO VOLTS NO AMPS INDICATED. GROUNDED - YES. (RESOLVED ON W/O: 1975555 TASKCARD: N/R-00002) FOLLOWED IFIM 24-21-00-810-820. ALL WIRE CHECKS GOOD. REPLACED NO.1 GCB 801 AND APU CB 803 REF AMM 24-21-41. ALSO REF BOEING FTD 24-22
- [SDR ASAA2023102545841](https://openairdocs.org/sdr/ASAA2023102545841.md): Unknown · unknown · Oct 25, 2023 · N921AK · Boeing 7379
  > WITH APU RUNNING NO FREQS OR VOLTS DISPLAYED. BLEED AIR WORKS. GROUNDED - YES. ACCOMPLISHED APU START PROCEDURE REF B737-9 AMM 49-11-00 ALL OPS NML WITH GOOD VOLTS AND FREQS. NO STATUS MSG ON OMF.
- [SDR ASAA2023092445294](https://openairdocs.org/sdr/ASAA2023092445294.md): Contactor · faulty · Sep 24, 2023 · N948AK · Boeing 7379
  > ON PREFLIGHT FOUND THE SOURCE OFF WITH APU SELECTED ON LEFT / #1. GROUNDED - YES. REMOVED AND REPLACED AUXILIARY POWER BREAKER C803- P91 AND PERFORMED GOOD TEST OF THE AUXILIARY POWER BREAKER AS PER AMM 24-21-41/401.
- [SDR AALA2023080407690](https://openairdocs.org/sdr/AALA2023080407690.md): Unknown · failed · Aug 1, 2023 · N830AN · Boeing 7879
  > AIRCRAFT WAS GROUNDED: "ELEC GEN OFF R2" DISPLAYED ON SYNOPTIC WOULD NOT RESET. MAINTENANCE FOUND ELECTRICAL ARC FLASH WITH HEAVY SOOT CONTAMINATION DISCOVERED ON OVER VOLTAGE TRANSIENT PROTECTION UNIT. **SUPPLEMENTAL REPORT FOR AALA202308024413: MAINTENANCE R
- [SDR SIMA20230716001](https://openairdocs.org/sdr/SIMA20230716001.md): Unknown · unknown · Jul 16, 2023 · N261NN · Emb ERJ170200LR
  > REJECTED TAKEOFF 110KTS DUE TO IDG2 FAIL. -C/A-PERFORMED HIGH ENERGY STOP CONDITION INSPECTION W/C IAW 05-50-12-200-801-A. NO DEFECTS NOTED AT THIS TIME.
- [SDR ASAA2023070543908](https://openairdocs.org/sdr/ASAA2023070543908.md): Unknown · unknown · Jul 5, 2023 · N514AS · Boeing 737890
  > APU GEN OFF LIGHT NOT ILLUMINATING WHEN APU IS OPERATIONAL. GROUNDED - YES. STARTED APU. APU GEN OFF LIGHT WORKS NORMAL. CYCLED APU GEN OFF AND ON SEVERAL TIMES WITH NO FAULTS. APU GCU BITE GOOD. REF FIM 24-21 TASK 801.
- [SDR DXTA2023062689410](https://openairdocs.org/sdr/DXTA2023062689410.md): Unknown · unknown · Jun 26, 2023 · N341QS · Cessna 680SOV
  > AC GENERATION AND CONTROL: SLIGHT ELECTRICAL SMOKE ODOR BEFORE TAKEOFF, FADED WHEN FACING DOWN RUNWAY. DURING TROUBLESHOOTING OF THE RH WINDSHIELD HEAT INOP CAS MESSAGE. WHILE REMOVING RH WINDSHIELD HEAT CONTROLLER, NOTED STRONG ELECTRICAL BURNING SMELL FRO
- [SDR CALA2023062602037](https://openairdocs.org/sdr/CALA2023062602037.md): Idg · unknown · Jun 25, 2023 · N792UA · Boeing 777222
  > ELEC GEN SYS R EICAS STATUS IDG HAS DISCONNECTED OR A PROTECTIVE TRIP OF THE GENERATOR CONTROL BREAKER HAS OCCURRED OR A PROTECTIVE TRIP OF THE BTB HAS OCCURRED. REPLACED IDG REF AMM24-11-01. ENGINE RUN ACCOMPLISHED AND ALL INDICATION NORMAL. ROTABLE PARTS CHA
- [SDR ASAA2023062343692](https://openairdocs.org/sdr/ASAA2023062343692.md): Module · faulty · Jun 23, 2023 · N948AK · Boeing 7379
  > SOURCE OFF LIGHT ON GEN 1 SIDE WHEN TRANSFERRING FROM GROUND POWER TO APU GEN. GROUNDED - YES. OMF SHOWS NO FAULTS, GCU & BPCU NO FAULTS, ELECTRICAL PANEL MODULE TEST NO FAULTS AMM 46-13-00, AMM 24-21-00, AMM 24-41-00, AMM 24-31-00, CYCLED A/C POWER WITH NO FI
- [SDR ASAA2023041442902](https://openairdocs.org/sdr/ASAA2023041442902.md): Panel · faulty · Apr 14, 2023 · N956AK · Boeing 7379
  > ON TAKE-OFF ROLL ELEC 2 HYDRAULIC LOW PRESSURE LIGHT ILLUMINATED. GROUNDED - YES. FOUND C/B C881 (F3) IN P92 PANEL OUT. INSPECTED HYD PUMP D02664 + NO DEFECTS FOUND RESET C/B REF B737-9 AMM 20-60-01. C/B POPPED WIEN "A" SYS ELEC 2 SWITCH TURNED ON. C/B DOES NO
- [SDR VNAA202304181111](https://openairdocs.org/sdr/VNAA202304181111.md): Gcu · unknown · Apr 14, 2023 · N543EA · Cndair CL6002C10
  > IDG 2 FAIL INFLIGHT, MULTIPLE STATUS MESSAGES APU BATTERY CHARGER, FLAPS HALFSPEED, SLATS HALFSPEED, DC ESS TIED CLOSED, DC MAIN TIE CLOSED, ICE DET 2 FAIL / REMOVED AND #2 GCU IAW CRJ 900 AMM 24-11-07-000/400-801 AND OPS CHECK GOOD IAW CRJ 900 AMM 24-11-01-71
- [SDR ASAA2023032842646](https://openairdocs.org/sdr/ASAA2023032842646.md): Contactor · faulty · Mar 28, 2023 · N589AS · Boeing 737890
  > APU GEN OFF BUS LIGHT DOES NOT ILLUMINATE AFTER APU START W/APU ELECTRIC AVAILABLE BUT NOT ON BUS. LIGHT BULBS TEST OK. GROUNDED - YES. REPLACED AUX POWER BREAKER C803 REF B737-800 AMM 24-21-41.
- [SDR CALA2023032700890](https://openairdocs.org/sdr/CALA2023032700890.md): Idg · unknown · Mar 27, 2023 · N792UA · Boeing 777222
  > ELEC GEN DRIVE L EICAS ADVISORY LEFT IDG FAULT (LOW INTERNAL OIL PRESSURE). REPLACED BOTH L&R GCU PER AMM 24-22-02-000-801. GCU POST INSTLATION TESTED. FOUND OK. RAN BOTH ENG. GEN OPS NORMAL. PARTS USED: 1211678,QTY:1 27-2421-9-0001,QTY:1 ROTABLE PARTS CHANG
- [SDR IPXA2023022091140](https://openairdocs.org/sdr/IPXA2023022091140.md): Buss · none · Feb 19, 2023 · N432UP · Boeing 75724APF
  > DIVERSION & EMERGENCY DECLARED. L AC BUSS OFF LIGHT IN FLIGHT. FOLLOWED PROCEEDURE IN QRH. RESETTING GEN CONT SWITCH HAD NO EFFECT. UPON STARTING APU AND RUNNING CYCLED L BUS TIE SWITCH WHICH RESTORED POWER TO ACFT. DEFERRED LEFT GENERATOR IAW MEL 24-00-1. DM
- [SDR SWAA2023022005157](https://openairdocs.org/sdr/SWAA2023022005157.md): Buss · fault message · Feb 16, 2023 · N426WN · Boeing 7377H4
  > IN CLIMB AROUND FL 180; LOST #1 GEN; TR1; AND HALF THE AIRCRAFT ELECTRICAL SYSTEM. APU AND GROUND POWER WILL NOT POWER AIRCRAFT; NUMEROUS OTHER NON NORMAL INDICATIONS THROUGHOUT COCKPIT.<[01] RAN #1; #2 ENG; AND APU PER AMM 71-00-00 AND AMM 49-11-00. CYCLED AI
- [SDR SWAA2023022003800](https://openairdocs.org/sdr/SWAA2023022003800.md): Generator · fault message · Feb 16, 2023 · N426WN · Boeing 7377H4
  > IN CLIMB AROUND FL 180; LOST #1 GEN; TR1; AND HALF THE AIRCRAFT ELECTRICAL SYSTEM. APU AND GROUND POWER WILL NOT POWER AIRCRAFT; NUMEROUS OTHER NON NORMAL INDICATIONS THROUGHOUT COCKPIT.<[01] RAN #1; #2 ENG; AND APU PER AMM 71-00-00 AND AMM 49-11-00. CYCLED AI
- [SDR IPXA2023020290543](https://openairdocs.org/sdr/IPXA2023020290543.md): Buss · inoperative · Feb 1, 2023 · N432UP · Boeing 75724APF
  > INSPECTION TYPE:NA*EMERGENCY DECLARED* *LANDED WITH NO FURTHER PROBLEMS* L AC BUSS OFF - RAN QRH PROCEDURE RETURNED A/C TO NORMAL STATUS LEFT BUS TIE REMAINED ISOLATEDRESET BUS TIE SWITCH AND PERFORMED OPS TEST IAW AMM 24-50-00-715-003 TES GOOD AND NO 60DAYS
- [SDR ASAA2022121341168](https://openairdocs.org/sdr/ASAA2022121341168.md): Module · faulted · Dec 13, 2022 · N428AS · Boeing 737990ER
  > ON TAXI-IN WITH APU RUNNING AND ELECTRIC AVAILABLE APU GENERATORS WOULD NOT COME ONLINE. APU GEN VOLTAGE READ 0 (ZERO). GROUNDED - YES. OPERATED APU GERATION SYSTEM WITH NO DISCREPANCIES NOTED. CYCLED POWER SEVERAL TIMES BETWEEN APU AND ENGINES, ALL OPS NML. R
- [SDR ASAA2022120941085](https://openairdocs.org/sdr/ASAA2022120941085.md): Generator · inoperative · Dec 9, 2022 · N428AS · Boeing 737990ER
  > APU GENERATOR FELL OFF LINE PRIOR TO PUSHBACK. GROUNDED - YES. REMOVED AND REPLACED APU GENERATOR WITH REFERENCE B737-900 AMM 49-41-21-400-801 STEP (H) (7C). OPS CHECK GOOD AND NO LEAK FOUND WITH REF AMM 49-41-21-710-001.
- [SDR Z1RA76010232022](https://openairdocs.org/sdr/Z1RA76010232022.md): Generator · worn · Oct 23, 2022 · N760AF · Skrsky S76D
  > AC GEN BEARING LIGHT ILLUMINATED IN FLIGHT.
- [SDR WX0A1900010074276](https://openairdocs.org/sdr/WX0A1900010074276.md): None · none · Oct 7, 2022 · N224NV · Airbus A320214
  > (EMERGENCY DECLARED) #1 ELEC GEN FAULT INFLIGHT FOLLOWED ECAM PROCEDURE RESET GEN 1 FAULT CLEARED AFTER 1 TO 2 MIN, GEN 1 FAULT RETURNED ON ECAM PROCEDURES- NO ELECTRICAL BURN SMELL OR VISUAL INDICATORS / INSTALLED NEW APU STARTER LEADS IAW ESPM 20-48-19.REMO
- [SDR NACA2022091300001](https://openairdocs.org/sdr/NACA2022091300001.md): Control Unit · intermittent · Sep 13, 2022 · N379CX · Boeing 767
  > INTERMITTENT EICAS MESSAGE R GEN DRIVE ON FINAL INTO KMIA. REMOVED ND REPLACED RIGHT GENERATOR CONTROL UNIT IAW B767 AMM 24-22-02 OPS CHECK GOOD. ETOPS GROUND VERIFICATION COMPLIED WITH. AC REMAINS ETOPS 180. NO TIME INFO IN TRAX.
- [SDR 2022FA0000494](https://openairdocs.org/sdr/2022FA0000494.md): None · worn · Sep 2, 2022 · N314RC · Bombdr CL6002D15
  > ON TAKEOFR ROLL, AT 50 KNOTS, PILOT STATED "#2 GEN FAIL" CAS MESSAGE DISPLAYED, AND TAKEOFF ABORTED. FINAL INVESTIGATION REVEALED #2 ENG INTEGRATED DRIVE GENERATOR (IDG) DELTA P INDICATOR WAS SET. REMOVAL AND INSPECTION OF FILTER REVEALED NUMEROUS METAL PART
- [SDR HNAA2022090500254](https://openairdocs.org/sdr/HNAA2022090500254.md): Warning Message · illuminated · Sep 1, 2022 · N669MB · Emb EMB145LR
  > 115V AC OFF BUSS MESSAGE DURING T/O ROLL AT ABOUT 75 KTS. T/O ABORTED AND MESSAGE CLEARED WITH NO ACTION TAKEN. CREW FOLLOWED QRH AND RESET BUSS AS PRECAUTION. IRREGULARITY CLEARED USING NORMAL CREW PROCEDURE.
- [SDR 2022F00317](https://openairdocs.org/sdr/2022F00317.md): None · none · Aug 11, 2022 · N225AX · Boeing 767
  > RIGHT BUS ISOLATED, RIGHT BUS TIE ILLUMINATED. RIGHT GEN OFF LINE. CORRECTIVE ACTION: INSPECTED AND TROUBLESHOOT RIGHT ISOLATION BUS REF FIM 24-20 TASK 802. MAIN BUS / OVERLAP ZONE. ALL CHECKS GOOD AT THIS TIME. RAN BOTH ENGINES AND DISCONNECTED BOTH L & R BU
- [SDR 9WGA2022080878101](https://openairdocs.org/sdr/9WGA2022080878101.md): Gauge · broken · Aug 8, 2022 · N781SN · Doug MD11F
  > DURING CLIMBOUT, LVL 2 ALERT #3 GEN WAS OFF. RIGHT EMERGENCY POWER CAME ON. REMOVED AND REPLACED #3 GCU IAW AMM 24-21-03. ENGINE RUN AND RTS SATISFACTORY.
- [SDR TIMA20220108009](https://openairdocs.org/sdr/TIMA20220108009.md): Generator · inoperative · Aug 1, 2022 · N216CS · Beech C99
  > LEFT BOTH STARTERS ON AFTER START UP ( FLEW A B MODEL FOR 2 WEEKS AND GOT USED TO THE NON LOCKING TOGGLE SWITCH), COUPLE MINUTES AFTER TAKE OFF I NOTICED THE GENERATOR FAIL. TOLD SLC I WAS RETURNING AND LOST POWER. MADE THE DECISION TO FLY INTO KPVU. MADE AT
- [SDR CALA2022070601649](https://openairdocs.org/sdr/CALA2022070601649.md): Hydraulic System · failed · Jul 6, 2022 · N24973 · Boeing 7879
  > HYD PRESS C1 ADVISORY THE MESSAGE IS DISPLAYED WHEN ONE OF THE FOLLOWING CONDITION EXISTS:1.) PUMP IS SELECTED TO OFF AND PUMP PRESSURE IS LOW.2.) PUMP IS COMMANDED TO RUN AND PUMP PRESSURE IS LOW.THIS MESSAGE IS INHIBITED WHEN THE SYSTEM PRESSURE IS LOW OR TH
- [SDR ASAA2022070138906](https://openairdocs.org/sdr/ASAA2022070138906.md): Circuit Breaker · faulty · Jul 1, 2022 · N291BT · Boeing 7379
  > DURING APU START, AC FLAGGED A APU FAULT UNABLE TO ACCEPT A/C POWER (GROUND). GROUNDED - YES. REMOVED AND REPLACED AUX POWER BREAKER, C803 IN P91 POWER PANEL. OPS TEST GOOD; APU START WITH GEN TRANSFER SUCCESSFUL. REF B737-9 AMM 24-21-41. A/C EXT POWER OPS TES
- [SDR 2022F00288](https://openairdocs.org/sdr/2022F00288.md): None · none · Jul 1, 2022 · N705KW · Boeing 767
  > R GEN OFF EICAS MESSAGE ILLUMINATED AFTER TAKEOFF. REPORTED IN BPCU BITE TEST SHOWED ROLLING FAULTS: 1. DP TRIP 2. MAIN BUS/ OVERLAP ZONE 3. GEN/FDR 4. IDG / OIL IN BULB WARNING.
- [SDR 2022FA0000302](https://openairdocs.org/sdr/2022FA0000302.md): None · none · Jun 19, 2022 · N795AX · Boeing 767281
  > L GEN DRIVE, L GEN "OFF" EICAS MESSAGE. AIRCRAFT BTB AND GROUNDED BY MAINTENANCE. PERFORMED BPCU BITE IAW B767 FIM 24-20 FAULT TREE 01 AND TASK 24-20 804. RECONNECTED IDG AND RAN ENG. COULD NOT DUPLICATE NO FAULTS FOUND. PLACARD REMOVED. MX PROC C/W. AIRCRAFT
- [SDR ASAA2022061138613](https://openairdocs.org/sdr/ASAA2022061138613.md): Apu · failed · Jun 11, 2022 · N933AK · Boeing 7379
  > AC WILL NOT TAKE GROUND POWER. GROUNDED - YES. FLIGHT CREW FURTHER CLARIFIED THAT APU WOULD NOT START, NO GROUND SERVICE POWER (SYMPTOMS DESCRIBED IN B737-9 IFIM TASK 24-22-00-810-801). REMOVED AND REPLACED AUXILIARY POWER BREAKER C803 PER B737-9 AMM 24-21-41.
- [SDR ASAA2022060238554](https://openairdocs.org/sdr/ASAA2022060238554.md): Connector · burned · Jun 2, 2022 · N403AS · Boeing 737900ER
  > #2 GEN SOURCE OFF LIGHT ILLUMINATED ON TOUCH DOWN. RESET ONCE CAME BACK ON APPLIED APU AND LIGHT EXTINGUISHED. GROUNDED - YES. GCU 2 LOGGED IDG FAULT. ACCOMP BITE CK OF #2 GCU REF FIM 24-21 TASK 801. TEST PASSED AND IDG FAULT CLEARED. RAN #2 ENG, CSD PORTION O
- [SDR AALA202206039756](https://openairdocs.org/sdr/AALA202206039756.md): Generator · none · May 31, 2022 · N787AL · Boeing 777223
  > AIRCRAFT WAS GROUNDED: AIRCRAFT WAS GROUNDED: AIRCRAFT ELEC BACK GEN L STATUS MESSAGES SHOWED, FLIGHT DIVERTED TO JFK. REMOVED AND REPLACED BACKUP LEFT GENERATOR PER AMM 24-25-01.
- [SDR ASAA2022051238299](https://openairdocs.org/sdr/ASAA2022051238299.md): Circuit Breaker · faulty · May 12, 2022 · N921AK · Boeing 7379
  > AFTER LANDING GEN #2 WOULD NOT TRANSFER TO APU GEN PLACED BOTH ENG GEN BACK ON LINE THEN SELECTED GEN #2 TO APU FIRST. BOTH GEN TRASFERED TO APU GEN. GROUNDED - YES. VERIFIED WITH APU & EXT. & ENG. RUN. REPLACED APU C803 BREAKER WITH NEW ONE. ACCOMP. INST. TES
- [SDR CALA2022050601156](https://openairdocs.org/sdr/CALA2022050601156.md): Harness · damaged · May 5, 2022 · N77871 · Boeing 757
  > LEFT BUSS OFF LIGHT ILLUMINATED ACCOMPANIED BY ISLN LIGHT ON LEFT BUSS TIE SWITCH AND LEFT GEN OFF LIGHT ALSO ILLUMINATED. CREW STATES THE LEFT GEN RESET ONCE SUCCESSFULLY AND WHEN ATTEMPTING TO BRING THE LEFT BUSS BACK ON LINE EVERYTHING TRIPPED OFF AGAIN. NO
- [SDR CALA2022042901100](https://openairdocs.org/sdr/CALA2022042901100.md): Idg · failed · Apr 29, 2022 · N14107 · Boeing 757200
  > ALL ELEC FAIL ON TAKEOFF RGEN RECOVERED 15 SECS LATER STARTED AP U AND RAN QRH FOR LGEN OFF CHECKED AT GENERATOR AND FOUND T2 TERMINAL OF GENERATOR DISPLAYING SAME READINGS. NEEDS GENERATOR REPLACED. AT THE GATE, PERFORMED BITE CHKOF THE BPCU, ALL THE FAULTS W

Next page: https://openairdocs.org/jasc/2420/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 = '2420'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/2420/reports

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