# SDR CALA2026011212871

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 7, 2026
- Submitted: January 12, 2026
- Operation: Air carrier
- Aircraft: [N27959](https://openairdocs.org/aircraft/N27959), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36407
- Aircraft time: 48,772 hours, 4,660 cycles
- System (JASC): [2497 · Electrical Power System Wiring](https://openairdocs.org/jasc/2497)
- Part: Resistor
- Part number: 70000290231
- Condition: Burned
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: M
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026011212871

## Discrepancy

MANY STATUS MSGS NITRO GEN SYS ELEC ENG START R2.  FOUND R2 ATRUC TRIPPED ON ESIC.  PRESENT LEG FAULT MAINTENCE MSG 24-17504 RELATED TO THE MULTIPLE STATUS MESSAGES.  FOUND R2 SOFT START RESISTOR (R2 SSRA) BURNED (DAMAGED) IN THE P200 PANEL. FOLLOWED FIM 24-30-F5-69A-421A. (MSG 24-17504). STARTED REMOVAL OF RESISTOR - UNABLE TO SEPERATE FROM CONNECTOR. ADDED PHOTOS OF DAMAGED RESISTOR. ALL PARTS BAGGED AND TIED TO AREA. PLACED NEW PART TAPED TO P200 PANEL. REMOVED R2 SOFT START RESISTOR ASSEMBLY, M2409024, FROM P200 PANEL. SOCKET LOCK ASSY DAMAGED AT POSITION NR 1. SOFT START RESISTOR, 15 AMP CONTACTOR & CONTACTOR LOCATED ON R&E DESK.  RESISTOR, PPDS, SOFT START, M&E 78-2400-3-0030 FOUND BURNED. REMOVED WIRE FROM R2 SOFT START RESISTOR CONNECTOR AT POSITION NR 2 DUE TO INTERNAL HEAT DAMAGE. REPLACED P200 SOFT START RESISTOR ASSEMBLY IN REF TO DMC-B787-A-24-15-09-00A-520A-A, AND INSTALLED NEW CONTACT ON WIRE W100206-00027-16 REF DMC-B787-A-24-35-22-02A-051A-D AND SWPM 20-52-99, OPS CHECK GOOD. STATUS MESSAGES CLEARED, NORMAL ADD EMP:U138152 INDICATIONS ON ESIC PAGE. NO ACTIVE FAULTS AT THIS TIME.

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