# Service difficulty reports: N20904

A list on [N20904](https://openairdocs.org/aircraft/N20904.md).

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

- [SDR CALA2025112611495](https://openairdocs.org/sdr/CALA2025112611495.md): Tru · faulted · Nov 23, 2025 · N20904 · Boeing 7878 · Electrical Power System
  > SMELL OF SMOKE IN FWD CABIN AND DOOR 3R FLAGGING SDR. DETECTED SMOKE ODOR IN THE AFT E/E EXHAUST. INSPECTED AFT E&E AND NOTED SMOKE COMING OUT FROM THE BACK SECTION OF THE R1 ATRU M2435003 IN P800 E6. REMOVED R1-ATRU AS PER AMM DMC-B787-A-24-35-00-00A-520A-A.
- [SDR CALA2025110610939](https://openairdocs.org/sdr/CALA2025110610939.md): Light Sys · no discrepancy · Nov 3, 2025 · N20904 · Boeing 7878 · Emergency Lighting
  > EMERGENCY LIGHTS BETWEEN ROW 33 AND 38 LT & RT, NOT WORKING. COMPLETED FULL TEST OF EMERGENCY LIGHT SYSTEM IAW MM DMC-B787-A-33-51-00-07A-343A-A. NO FAULTS FOUND, ALL LIGHTS OPERATING NORMALLY.
- [SDR CALA2025092909382](https://openairdocs.org/sdr/CALA2025092909382.md): Battery · inoperative · Sep 26, 2025 · N20904 · Boeing 7878 · Emergency Lighting
  > L2 DOOR UPPER LIGHTS, 2 EACH, OUT OF THE 4 ARE OUT AND COACH SEATS 33F -37F ARE ALSO OUT. ALSO SEATS 33D-38D ARE ALSO OUT. DOOR 2 LEFT LIGHTS THAT WERE OUT ARE THE WORK LIGHTS, NOT THE EMERGENCY LIGHTS. WHEN WORK LIGHT SWITCHES DEPRESSED ON THE JUMPSEAT, LIGH
- [SDR CALA2025092209072](https://openairdocs.org/sdr/CALA2025092209072.md): Unknown · odor · Sep 19, 2025 · N20904 · Boeing 7878 · Air Distribution System
  > SMOKE REST UPPER DOOR 4 CAUTION, SMOKE IS DETECTED IN THE UPPER CREW REST COMPARTMENT AT DOOR 4. NO SMOKE BUT VAPE SMELL NEAR AFT LAVS CHECKED OFAR AND AFT LAVS AREA. NO EVIDENCE OF SMOKE OR VAPE AND NO ALARMS DISPLAYED. OK TO CONTINUE.
- [SDR CALA2025082808226](https://openairdocs.org/sdr/CALA2025082808226.md): Software · missing · Aug 27, 2025 · N20904 · Boeing 7878 · Emergency Lighting
  > FOUND FWD HALF OF ECONOMY SEATS EMERGENCY LIGHTS WOULD NOT COME ON WITH EMERGENCY SWITCH IN ON POSITION DURING INSTALLATION TEST - CMCF SHOWS CODES 33-11624 AND 33-11726; CLASS 24,26 REMOTE WELS LAMP DRIVER POWER CIRCUIT IS FAILED. REMOVED AND INSTALLED NEW WE
- [SDR CALA2025062605902](https://openairdocs.org/sdr/CALA2025062605902.md): Control Unit · inoperative · Jun 23, 2025 · N20904 · Boeing 7878 · Emergency Lighting
  > EMERGENCY PATH LIGHTING ROWS 30-32 DOES NOT OPERATE. FAULT 33-11624 ACTIVE. LAMP DRIVER FAILED 30F,31F,32F LIGHTS DO NOT ILLUMINATE 30D,31D,32D LIGHTS DO NOT ILLUMINATE FOUND ROW 30D TERMINAL END NOT CONNECTED TO WIRE. RETERMINATED WIRE REF SWPM 20-30-11 PG 56
- [SDR CALA2025061205480](https://openairdocs.org/sdr/CALA2025061205480.md): Bustle · detached · Jun 7, 2025 · N20904 · Boeing 7878 · Escape Slide
  > FOUND DOOR L2 PAX DOOR SLIDE BUSTLE ONE SIDE DETACHED FROM BRACKET; INSTALLED BUSTLE REF DMC-B787-A-52-11-24-03A-720A-A.
- [SDR CALA2025030402568](https://openairdocs.org/sdr/CALA2025030402568.md): Sensor · out of rig · Mar 1, 2025 · N20904 · Boeing 7878 · Door Warning System
  > BULK CARGO DOOR CLOSED AND LATCHED PROXIMITY SENSOR IS OPEN - REPORTED IN AHM MX MSG 52-10316, NEED TO PERFORM AMM 45-11-00-73A-110B "PROX SNSR RIGGING FUNCTION" IN CMCF "OTHER FUNTIONS", IF SENSOR IS OUT OF THE RIG LIMIT, PLEASE ADJUST OR REPLACE SENSOR REF.
- [SDR CALA2025012402024](https://openairdocs.org/sdr/CALA2025012402024.md): Latch · out of adjust · Jan 21, 2025 · N20904 · Boeing 7878 · Escape Slide
  > SLIDE AT DOOR4R HAS LARGE GAP ADJUSTED SLIDE COVER LATCH. RESECURED SLIDE COVER. AMM REF 52-11-24 ADD EMP:379788
- [SDR CALA2025012301985](https://openairdocs.org/sdr/CALA2025012301985.md): Battery · faulted · Jan 19, 2025 · N20904 · Boeing 7878 · Emergency Lighting
  > INSTALLATION TEST - SEAT CENTER EMERGENCY LIGHTS FROM 33L/R TO 38L/R DON'T WORK, WHEN "EMERGENCY LIGHT" SWITCH IS TURN ON. REMOVED AND REPLACED WCU26 AND WBU26 IAW AMM B787-A-33-51-07-01B-720A-A. EMERGENCY FLOOR LIGHTING AT ROWS 33 TO 38 OPS CHECK GOOD.
- [SDR CALA2024020500336](https://openairdocs.org/sdr/CALA2024020500336.md): Coupler · failed · Feb 2, 2024 · N20904 · Boeing 7878 · Communications System Wiring
  > UNABLE TO TRANSMIT ON HF2 NO CARRIER NO VOICE REF LOG PAGE 6970469 RH HF XCVR REPLACED, CMC TEST PASSED. STILL UNABLE TO TRANSMIT. MAINT MESSAGE 23-11072. PER FIM FOR MAINT. MSG 23-11072 SUGGEST TO REPLACE "RIGHT HF COUPLER" B2211203. HF COUPLER M&E 78-2311-9-
- [SDR CALA2024010800059](https://openairdocs.org/sdr/CALA2024010800059.md): Light · incorrect · Jan 6, 2024 · N20904 · Boeing 7878 · Emergency Lighting
  > DURING CHECK THE ECONOMY AND ECONOMY PLUS CENTER SEAT ROWS 30-39 LH FOUND THE EMERGENCY LIGHT ON SEAT 31D P/N INCORRECT,ORIGINAT ED BY EMP V909212,REF TO HAECO NON ROUTINE NO.9472340 EA 3351-01 372 REV B OP012. PERFORMED BY EMP V909212,REPLACED THE LAMP ASSEMB
- [SDR CALA2024010800057](https://openairdocs.org/sdr/CALA2024010800057.md): Light · malfunctioned · Jan 5, 2024 · N20904 · Boeing 7878 · Emergency Lighting
  > 51F EMERGENCY FLOOR LIGHT FOUND FLASH REFER HAECO NON-ROUTINE NO.9471434,ORIGINATED BY EMP:V909212, SPEC NO.B787-33-3-0001. PERFORMED BY EMP:V909212,REPLACED THE LAMP ASSEMBLY AS PER AMM 33-51-06-00A-520/720 REV.179 AND PERFORMED THE INSTALLATION TEST THE TES
- [SDR CALA2021041600479](https://openairdocs.org/sdr/CALA2021041600479.md): Rib · cracked · Apr 15, 2021 · N20904 · Boeing 7878 · Spoilers
  > R/H WING T/E CAVITY REAR SPAR BELOW NO.9 SPOILER BRACKET FND CRACK. HAECO XMN ACCOMPLISHED PART 1 INTERIM REPAIR AS PER ECRA 5751-01 387.AS PER PART 1 STEP 3 INITIATE A DIP TO ACCOMPLISH A PERMANEN T REPAIR PER THE LATEST REVISION OF EC5751-01387 PART 3 ON OR
- [SDR CALA2019110301898](https://openairdocs.org/sdr/CALA2019110301898.md): Door Seal · out of position · Nov 1, 2019 · N20904 · Boeing 7878 · Landing Gear Doors
  > AIRFRAME VIBRATION. REPORTED IN FLT DECK AND FORWARD CABIN. INCREASES WITH HIGHER AIRSPEED. ENG N2 VIBS ARE SHOWING.4 FOR ENG 1,.7 FOR ENG 2. PERFORMED WALK AROUND, FOUND LMG DOOR AFT SEAL PROTRUDING FROM LOWER BELLY. REPOSITIONED SEAL ONLY PER AMM 32-12-01-
- [SDR CALA2017091803223](https://openairdocs.org/sdr/CALA2017091803223.md): Light · damaged · Sep 18, 2017 · N20904 · Boeing 7878 · Emergency Lighting
  > EMERGENCY LIGHTS DAMAGED 25D EMERGENCY EXIT LIGHT BULBS MISSING 6 SEATS. REMOVED AND REPLACED DAMAGED FLOOR PROXIMITY LIGHT AT SEAT REMOVED AND REPLACED NEW LIGHT ASSY @ ROW 25D,25F,32F,36F. ALL OPS CKD NORMAL.OK TO CONTINUE.REF TO AMM 33-51-06.
- [SDR CALA2016050900293](https://openairdocs.org/sdr/CALA2016050900293.md): Warning System · false activation · May 9, 2016 · N20904 · Boeing 7878 · Central Warning
  > LOW SPEED 80KNTS REJECTED TAKEOFF. MULTIPLE EICAS CAUTIONS. MORE THAN FOUR CAUTIONS CYCLED. THE CAUTIONS THAT STAYED WERE SPOILER & AUTO BRAKE FOUND STATUS MSG HYD SPOILER SYS WITH CORRELATED MAIN MSG 27-12 159, 27-12152, 27-12163 & 27-12156. PERFORMED GND
- [SDR CALA2015090300728](https://openairdocs.org/sdr/CALA2015090300728.md): Rib · cracked · Sep 3, 2015 · N20904 · Boeing 7878 · Wing, Rib/Bulkhead
  > RIGHT WING REAR SPAR AT WS 481.10, AUX D INBD RIB, AFT UPPER RT ANGLE CRACKED WITH APPROX 4" IN LENGTH. RT WING INBD FIXED TE AUX D, RIB CRACKED AREA, CRACK LENGTH 3". REPAIRED IAW ECRA 5750-04814 REV PART 1 INTERIM REPAIR & FORM 44.0008 ATTACHED ITEM 1 - 11
- [SDR CALA2015090300727](https://openairdocs.org/sdr/CALA2015090300727.md): Connector · unsecure · Sep 2, 2015 · N20904 · Boeing 7878 · Light System Wiring
  > EMERGENCY LIGHT AT DOOR 2L INOPERATIVE DURING TEST. DOOR 2L EMER LIGHT ELEC PLUG SECURED & TESTED NORMAL IAW AMM 33-51-06.
- [SDR CALA2012103100687](https://openairdocs.org/sdr/CALA2012103100687.md): Oven · odor · Oct 30, 2012 · N20904 · Boeing 7878 · Buffet/Galleys
  > B ZONE GALLEY OVEN POSITION 405 WHEN COOKING MEALS, OVEN EMITS BURNING ODOR. OPINON IS THAT ODOR IS ELECTRICAL. TESTED OVEN COULD NOT DUPLICATE PROBLEM. REPLACED OVEN IAW DMC-B787-A-25-32-00-10A-720A-A & TESTED IAW DMC-B787-A-25-32-00-11A-320A-A. OPS NORM
- [SDR CALA2012101000664](https://openairdocs.org/sdr/CALA2012101000664.md): Slide · unwanted deploy · Oct 10, 2012 · N20904 · Boeing 7878 · Escape Slide
  > L3 DOOR SLIDE DEPLOYED. REMOVED & REPLACED DOOR SLIDE IAW MM 25-66-01 & DOOR ASSIST BOTTLE IAW MM 52-11-22. ALL CHECKED GOOD.
- [SDR CALA2012092800630](https://openairdocs.org/sdr/CALA2012092800630.md): Slide · inoperative · Sep 28, 2012 · N20904 · Boeing 7878 · Escape Slide
  > 25-63-01 EVAC COMMAND SYS DID NOT WORK FROM FLIGHT DECK OR F/A STATIONS. OPS TEST CHECKED GOOD IAW DMC-B787-A-25-63-02-00B (01B) -320 A-A.

## 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 n_number = 'N20904' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N20904/reports

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