# Service difficulty reports: N27957

A list on [N27957](https://openairdocs.org/aircraft/N27957.md).

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

- [SDR CALA2025102110356](https://openairdocs.org/sdr/CALA2025102110356.md): Light · inoperative · Oct 17, 2025 · N27957 · Boeing 7879 · Emergency Lighting
  > FOUND SEAT 44D & 54D EMER LT INOP. SEAT 44D EMER LIGHT ASSY REPLACED.LIGHT CHECK SATIS.RESTORED TO ORIGINAL CONFIG. SEAT 54D EMERGENCY LIGHT ASSY REPLCED AS PER B787-A-33-51-06-00A-520A-A/720A-A.OPERATIONAL CHECK ON SEAT 54D EMERGENCY LIGHT PASSED.
- [SDR CALA2025101710227](https://openairdocs.org/sdr/CALA2025101710227.md): Light · inoperative · Oct 17, 2025 · N27957 · Boeing 7879 · Emergency Lighting
  > FOUND SEAT 44D & 54D EMER LT INOP. SEAT 44D EMER LIGHT ASSY REPLACED.LIGHT CHECK SATIS.RESTORED TO ORIGINAL CONFIG. SEAT 54D EMERGENCY LIGHT ASSY REPLCED IAW B787-A-33-51-06-00A-520A-A/720A-A. OPS CHECK PASSED.
- [SDR CALA2025081407729](https://openairdocs.org/sdr/CALA2025081407729.md): Sensor · faulted · Aug 9, 2025 · N27957 · Boeing 7879 · Flight Control System
  > STABILIZER CONTROL CHANNEL (L2) HAS BEEN DEFERRED IN COMPLIANCE WITH MEL CARD 27105. DEACTIVATED THE INOPERATIVE STAB CONTROL CHANNEL AS REQUIRED ON CARD 27105, IAW AMM DDG 27-41-03. INSTALLED INOPERATIVE STICKER ADJACENT TO AFFECTED L2 STAB CUTOUT SWITCH ON
- [SDR CALA2025052704985](https://openairdocs.org/sdr/CALA2025052704985.md): Fan · failed · May 23, 2025 · N27957 · Boeing 7879 · Air Distribution Fan
  > FUMES NOTICED FROM PAX A ND CREW IN AREA OF CABIN ROW 46. DEBRIEFED CREW. SEE PAPERWORK. PER FLIGHT CREW NO FLIGHT DECK EFFECTS. INFLIGHT CREW NOTICED SMELL WENT AWAY AFTER PILOTS TURNED OFF IFE SWITCH AND RECIRC FAN PRESENT LEG SHOWS UPR RECIRC FAN FAILED IN
- [SDR CALA2025032002994](https://openairdocs.org/sdr/CALA2025032002994.md): Light · faulty · Mar 19, 2025 · N27957 · Boeing 7879 · Emergency Lighting
  > SEAT 30D WITH EMERGENCY PATH LIGHT BROKEN. REMOVED AND REPLACED PROXIMITY LIGHT. AS REF AMM TASK DMC-B787-A-33-51-06-00A-520A-A/DMC-B787-A-33-51-06-00A-720A-A ITEM GOOD FOR SERVICE. OPS TEST OK.
- [SDR CALA2025011001861](https://openairdocs.org/sdr/CALA2025011001861.md): Light · no test · Jan 9, 2025 · N27957 · Boeing 7879 · Emergency Lighting
  > PROCEDURE - EMERGENCY PROXIMITY LIGHT FROM SEAT 30D DOES NOT COME ON DURING TEST. REPLACED FLOOR PRIMITY LIGHT IN REF TO AMM 33-51-06-00A-520A-A AND AMM 33-51-06-00A-720A-A. ITEM OK AFTER TEST.
- [SDR CALA2024102100879](https://openairdocs.org/sdr/CALA2024102100879.md): Light · broken · Oct 18, 2024 · N27957 · Boeing 7879 · Emergency Lighting
  > BROKEN 12F SEAT PROXIMITY EMER LT. REPLACED EMER LT ASSY, OPS CHK OK.
- [SDR CALA2024051601483](https://openairdocs.org/sdr/CALA2024051601483.md): Engine · flamed out · May 14, 2024 · N27957 · Boeing 7879 · Engine (Turbine/Turboprop)
  > ENG FAIL L CAUTION THE LEFT ENGINE HAS FLAMED OUT AND RUN DOWN BELOW IDLE SPEED. FIM TASK REF: G73-90-F8-01A-421B-A CMC MSG# 7332901 FLIGHT STATUS: A INTERMITTENCE CODE: M PH: CLIMB NARRATIVE: ELECTRONIC ENGINE CONTROL CHAN-B (LEFT ENG) SDR FLAGGED.
- [SDR CALA2023112203448](https://openairdocs.org/sdr/CALA2023112203448.md): Slat · damaged · Oct 29, 2023 · N27957 · Boeing 7879 · Leading Edge Devices
  > DURING MARSHELLING OF THE A/C. JET BRIDGE STATIONED AT B66 COLLIDES WITH THE LEADING EDGE OF LEFT WING CAUSING SERIOUS DAMAGE. ATTACHED ADDITIONAL PICTURES OF LEFT WING LEADING EDGE DAMAGE SLAT # 2 & #3 M&E # SEE LOG PAGES 6164370 & 6164494 FOR WORK PERFORME
- [SDR CALA2022042101046](https://openairdocs.org/sdr/CALA2022042101046.md): Gear · inoperative · Apr 21, 2022 · N27957 · Boeing 7879 · Landing Gear System
  > AFTER TAKEOFF GEAR DISAGREE SOUND LIKE NOSEGEAR DOWN DOES NOT FOLLOW COMMAND W/ MX MSG 32-51001, MSG ACTIVE WENT TO INACTIVE WITH GEAR HANDLE DOWN. CREW DEBRIEF: CREW STATED GEAR HANDLE UP, GEAR DISAGREE SOUNDED LIKE GEAR DID NOT RETRACT & DOORS DID NOT CLOSE,
- [SDR CALA2022041800998](https://openairdocs.org/sdr/CALA2022041800998.md): Door · warning message · Apr 14, 2022 · N27957 · Boeing 7879 · Nose/Tail Landing Gear
  > GEAR DISAGREE EICAS MSG. GEAR DOOR CAUTION MSG. WITH NOSE GEAR INDICATION SHOWING HASHED. MAINTENANCE MESSAGE 32-51001. FLIGHT CREW BELIVE NLG DID NOT RETRACT WHEN COMMANDED. AIRCRAFT SUBSEQUENTLY DUMPED FUEL AND RETURNED TO LHR.
- [SDR CALA2022030900619](https://openairdocs.org/sdr/CALA2022030900619.md): Connector · loose · Mar 9, 2022 · N27957 · Boeing 7879 · Lighting System
  > L2 DOOR EMERGENCY EXIT SIGN ABOVE DOOR INOP REF HAECO NON-ROUTIN E NO.9481658 - ORIGINATED BY EMP AS PER N27957(0957) HANGAR NON-ROUTINE PICK UP SHEET (07 MAR 2022) ITEM 1. PERFORMED BY EMP REINSTALLED THE ELECTRICAL CONNECTOR TO DR 2L EXIT MARKING SIGN L33510
- [SDR CALA2022030100538](https://openairdocs.org/sdr/CALA2022030100538.md): Cable · none · Mar 1, 2022 · N27957 · Boeing 7879 · Lighting System
  > DURING PERFORM EMERGENCY LIGHT SYSTEM FULL TEST FOUND PAX SEAT 30DF TO 35DF EMERGENCY LIGHT NOT COME ON REF HAECO NON-ROUTINE NO.9479642 - ORIGINATED BY EMP EA 4400-01112 REV A OP001. PERFORMED BY EMP REFER FIM 33-50-F1-W5A-421A-A REV 140 AND SSM 33-51-11-0A-
- [SDR CALA2021120102231](https://openairdocs.org/sdr/CALA2021120102231.md): None · inoperative · Dec 1, 2021 · N27957 · Boeing 7879 · HF Communications System
  > LEFT HF INOP MAINT MESSAGES 42-59471 AND 23-19401. MESSAGES NOT ACTIVE UPON AND AMM 23-11-05. HF OPERATIONAL TEST CHECKS GOOD. ARRIVAL. REPLACED LEFT HF TRANSCEIVER PRECAUTIONARY. RESET ROTABLE PARTS CHANGE WAS INDICATED - TT # 1195254 SN OFF 8018 CROWN DO
- [SDR CALA2021022600230](https://openairdocs.org/sdr/CALA2021022600230.md): Beam · corroded · Feb 25, 2021 · N27957 · Boeing 7879 · Fuselage Miscellaneous Structure
  > M LAV UNDER SCUFF PLATE BEAM AND FRAME CORROSION REF NON-ROUTINE NR.9426069. SPEC NO.B787-25-3-0069. M LAV UNDER SCUFF PLATE BEAM AND FRAME REPLACED AS PER ECRA 2541 -01547 REV. ORIG.
- [SDR CALA2021022200216](https://openairdocs.org/sdr/CALA2021022200216.md): Light · cracked · Feb 22, 2021 · N27957 · Boeing 7879 · Emergency Lighting
  > THE LEFT FLOOR PROXIMITY LIGHT AT DOOR 3 GALLEY G9B FND CRACKED REF NON-ROUTINE NO.9426063. REPLACED DOOR 3 G9B GALLEY LT 2 EA FLOOR PROXIMITY LIGHT. PERFORMED OP TEST OF EMERGENCY LT FOUND NORMAL REF AMM 33-51-06- 00A-720A REV.144.
- [SDR CALA2021022200215](https://openairdocs.org/sdr/CALA2021022200215.md): Light · cracked · Feb 22, 2021 · N27957 · Boeing 7879 · Emergency Lighting
  > THE LEFT FWD, LEFT AFT, RIGHT FWD AND RIGHT AFT FLOOR PROXIMITY LIGHT AT GALLEY G5 FOUND CRACKED REF NON-ROUTINE NO.9426061. REPLACED G5 GALLEY LT FWD, LT AFT, RT FWD, RT AFT FLOOR PROXIMITY LIGHT. PERFORMED OP TEST OF EMERGENCY LT, FOUND NORMAL REF AMM 33-5
- [SDR CALA2021022200214](https://openairdocs.org/sdr/CALA2021022200214.md): Light · cracked · Feb 22, 2021 · N27957 · Boeing 7879 · Emergency Lighting
  > THE RIGHT FLOOR PROXIMITY LIGHT AT DOOR 3 GALLEY G9B FOUND CRACKED REF NON-ROUTINE NO.9426065. REPLACED DOOR 3 G9B GALLEY RT 2 EA FLOOR PROXIMITY LIGHT. PERFORMED OP TEST OF EMERGENCY LT FOUND NORMAL REF AMM 33-51-06- 00A-720A REV.144.
- [SDR CALA2021022200213](https://openairdocs.org/sdr/CALA2021022200213.md): Light · cracked · Feb 22, 2021 · N27957 · Boeing 7879 · Emergency Lighting
  > THE LEFT AND RIGHT FLOOR PROXIMITY LIGHT AT DOOR 3 GALLEY G9A FND CRACKED REF NON-ROUTINE NO.9426066. REPLACED DOOR 3 GALLEY G9A LT AND RT TOTAL 4 EA FLOOR PROXIMITY LIGHT. PERFORMED OP TEST OF EMERGENCY LT, FOUND NORMAL REF AMM 33 -51-06-00A-720A REV.144.
- [SDR CALA2021022200212](https://openairdocs.org/sdr/CALA2021022200212.md): Light · cracked · Feb 22, 2021 · N27957 · Boeing 7879 · Emergency Lighting
  > THE LEFT FWD, RIGHT FWD AND RIGHT AFT FLOOR PROXIMITY LIGHT AT GALLEY G4 FOUND CRACKED REF NON-ROUTINE NO.9426060 - ORIGINATED BY, SPEC NR.B787-33-3-0002. REPLACED G4 GALLEY LT FWD, RT FWD, RT AFT FLOOR PROXIMITY LIGHT, PERFORMED OP TEST OF EMERGENCY LT, FOUN
- [SDR CALA2021022200210](https://openairdocs.org/sdr/CALA2021022200210.md): Light · cracked · Feb 22, 2021 · N27957 · Boeing 7879 · Emergency Lighting
  > THE LEFT AFT, RIGHT FWD AND RIGHT AFT FLOOR PROXIMITY LIGHT AT DOOR 1 OFCR PANEL FOUND CRACKED REF NON-ROUTINE NO.9426059 - SPEC NO. B787-33-3-0002. THE LEFT AFT, RIGHT FWD AND RIGHT AFT FLOOR PROXIMITY LIGHT AT DOOR 1 OFCR HAD BEEN REPLACED, PERFORMED OPERAT
- [SDR CALA2020103001226](https://openairdocs.org/sdr/CALA2020103001226.md): Windshield · damaged · Oct 29, 2020 · N27957 · Boeing 7879 · Flight Compartment Windows
  > WINDOW HEAT RT FWD ADVISORY LOSS OF RIGHT FORWARD WINDOW HEAT (PRIMARY). FIM TASK REF: 31-90-F8-01A-421B-A CMC MESSAGE 3032413. FLIGHT STATUS: LT INTERMITTENCE CODE: M PH: CRUISE NARRATIVE: 24 PDHM OPS (GPM L8) CMC MESSAGE 3032413 FLIGHT STATUS: LT INTERMITT
- [SDR CALA2018120202463](https://openairdocs.org/sdr/CALA2018120202463.md): Engine · vibration · Nov 29, 2018 · N27957 · Boeing 7879 · Engine (Turbine/Turboprop)
  > LEFT ENG HIGH VIBRATION 7.0. OPERATED AT 66 N1 VIB 2.0. REVIEW OF CMC NIL EXCEEDANCES RECORDED REF CREW REPORT AIRCAFT WAS OPERATING IN ICING CONDITIONS. REF.FTD 71-13002. NIL MSG NOTED HI VIBRATION NOTED. INSPECTION CARRIED OUT AS PER AMM G71-00-00-3A-280A N
- [SDR CALA2017122804633](https://openairdocs.org/sdr/CALA2017122804633.md): Battery · faulty · Dec 28, 2017 · N27957 · Boeing 7879 · Emergency Equipment
  > FIRST OFFICER'S EMERGENCY FLASHLIGHT INOPERATIVE. REMOVED AND REPLACED THE BATTERY. OPS CHECKED GOOD.
- [SDR CALA2017080802554](https://openairdocs.org/sdr/CALA2017080802554.md): Control Unit · faulty · Aug 8, 2017 · N27957 · Boeing 7879 · Emergency Lighting
  > DURING EMERGENCY LIGHT TEST, FOUND FLOOR LIGHTING AT ROWS 1 & 2 INOPERATIVE. R & R WCU AT SEAT 1F, OPS CHECKED GOOD. WORK IAW AMM 33-51-00-00C-320A.

## 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 = 'N27957' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N27957/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.