# SDR 98ZZZX2879

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N74318
- Make and model: Boeing 727231
- Aircraft serial: 20051
- System (JASC): [2436 · DC Regulator](https://openairdocs.org/jasc/2436)
- Part: Voltage Reg
- Part number: 905D9774
- Condition: Malfunctioned
- Location: E/E Bay
- Stage of operation: CR
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX2879

## Discrepancy

DURING CRUISE FLIGHT, CREW NOTICED ALL LIGHTS IN COCKPIT, RADAR SCREEN, AND GPS SCREEN WOULD FLASH ON AND OFF EVERY FEW MINUTES.  KILOWATTS ON THE NR 1 WOULD SPIKE TO 25 TO 30 KILOWATTS.  NR 2 GENERATOR WOULD DO THE SAME THING.  BTB ILLUMINATED.  COULD NOT BRING NR 2 GEN ON-LINE.  DURING DESCENT, CREW WAS AWARE OF STRONG ELEC  SMOKE IN COCKPIT.  REMOVED AND REPLACED NR 1 AND NR 2 GENERATORS, 3 VOLTAGE REGULATORS.  ON NR 2 GEN FOUND FIELD WIRE TERMINALS LOOSE.   CHECKED WIRING BEHIND ELEC RACK.  FOUND NO DEFECTS.  RAN ALL 3 ENG IN-FLIGHT MODE WITH ALL EQUIP ON.  NO DEFECTS.  NOTED:  PERFORMED OPER CHK OF ACFT AC AND DC GEN PER MM 24-20-0, PAGES 501 TO 504.  REF OPER CNTRL NR EISA98178, AND, NR 98ZZZX2878.

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