# Incident 19990409021199I: Boeing 737322, Minneapolis, MN, April 9, 1999

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: April 9, 1999, 15:55 local time
- Place: Minneapolis, MN
- Airport: Minneapolis-St Paul International-Wold
- Phase of flight: Normal Cruise
- Operating rules: Air carrier (Part 121)
- Operator: UALA
- Location: 44.9800° N, 93.2638° W: Placed by OpenAirDocs: center of Minneapolis, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.9800&lon=-93.2638&mi=10
- Aircraft: N335UA, a cancelled registration (https://openairdocs.org/deregistered/N335UA-2013-09-10) (OpenAirDocs)
- Registry model: Boeing 737-322 (registry code 138447Y, https://openairdocs.org/model/boeing-737-322) (OpenAirDocs)
- Registry engine: CFM International CFM56 series (registry code 13802, https://openairdocs.org/engine/cfm-international-cfm56-series) (OpenAirDocs)
- Reported make and model: BOEING 737322
- Reported engine: GE CFM56*
- People aboard: 83
- Fatal injuries: 0
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19990409021199I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

DURING CRUISE AT FLIGHT LEVEL 330, CAPTAIN SIDE LOST ALL INSTRUMENT SYSTEM POWER INCLUDING LOSS OF CABIN PRESSURE CONTROL. CREW FOUND TRANSFER BUSS CIRCUIT BREAKER (CB) TRIPPED. RESETTING CB RESTORED ALL POWER. CLIMBED BACK TO FL 330 AND LOST SYSTEM POWER AGAIN, BUT CB DID NOT TRIP. STANDBY POWER DID NOT PICK UP INSTRUMENT LOAD. STANDBY BUS LIGHT WAS ILLUMINATED. CREW DECLARED AN EMERGENCY AND DIVERTED TO MSP. MAINTENANCE PERSONNEL REPLACED NUMBER 1 T-R AND NUMBER 1 TRANSFER RELAY R-3. SYSTEM OPERATED NORMALLY AND AIRCRAFT WAS RETURNED TO SERVICE.

## Other reports on N335UA (1)

Matched to the same aircraft by N-number and date.

- [Incident 20030917022849I](https://openairdocs.org/incident/20030917022849I), Sep 17, 2003: Boeing 737322 (N335UA), Kansas City, MO. (-23) Regional operations center reported ual flight 449 from ord to phx diverted to mci due to a total electrical failure, with emergency equipment on…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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